From fdf54ac42efa55b6ec5c8770af7d7ecfea9dfbe5 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E2=80=9C=E5=AD=94=E5=87=AF=E8=BE=89=E2=80=9D?= <“2814283821@qq.com”> Date: Fri, 24 Feb 2023 23:19:48 +0800 Subject: [PATCH] =?UTF-8?q?=E4=BD=9C=E4=B8=9A?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../20230224\344\275\234\344\270\232.md" | 218 ++++++++++++++++++ 1 file changed, 218 insertions(+) create mode 100644 "44 \345\255\224\345\207\257\350\276\211/20230224\344\275\234\344\270\232.md" diff --git "a/44 \345\255\224\345\207\257\350\276\211/20230224\344\275\234\344\270\232.md" "b/44 \345\255\224\345\207\257\350\276\211/20230224\344\275\234\344\270\232.md" new file mode 100644 index 0000000..7010bb6 --- /dev/null +++ "b/44 \345\255\224\345\207\257\350\276\211/20230224\344\275\234\344\270\232.md" @@ -0,0 +1,218 @@ +| | | | +| ---------------- | ------------------------------------------------------------ | ------------------------------------------------------------ | +| ## 第1题：员工表 | | | +| | [2](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_2) | | +| | [3](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_3) | ```mysql | +| | [4](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_4) | drop table if exists `employee`; | +| | [5](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_5) | #创建employee表 | +| | [6](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_6) | CREATE TABLE employee( | +| | [7](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_7) | id INT, | +| | [8](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_8) | `name` VARCHAR(20), | +| | [9](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_9) | sex VARCHAR(20), | +| | [10](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_10) | tel VARCHAR(20), | +| | [11](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_11) | addr VARCHAR(50), | +| | [12](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_12) | salary FLOAT | +| | [13](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_13) | ); | +| | [14](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_14) | | +| | [15](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_15) | #添加信息 | +| | [16](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_16) | INSERT INTO employee(id,`name`,sex,tel,addr,salary)VALUES | +| | [17](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_17) | (10001,'张一一','男','13456789000','广东韶关',10010.58), | +| | [18](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_18) | (10002,'刘小红','女','13454319000','广东江门',12010.21), | +| | [19](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_19) | (10003,'李四','男','0751-1234567','广东佛山',10040.11), | +| | [20](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_20) | (10004,'刘小强','男','0755-5555555','广东深圳',15010.23), | +| | [21](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_21) | (10005,'王艳','男',NULL,'广东广州',14050.16); | +| | [22](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_22) | ``` | +| | [23](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_23) | | +| | [24](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_24) | | +| | [25](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_25) | | +| | [26](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_26) | \| ***\*id\**** \| ***\*name\**** \| ***\*sex\**** \| ***\*tel\**** \| ***\*addr\**** \| ***\*salary\**** \| | +| | [27](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_27) | \| ------ \| -------- \| ------- \| ------------ \| -------- \| ---------- \| | +| | [28](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_28) | \| 10001 \| 张一一 \| 男 \| 13456789000 \| 广东韶关 \| 10010.58 \| | +| | [29](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_29) | \| 10002 \| 刘小红 \| 女 \| 13454319000 \| 广东江门 \| 12010.21 \| | +| | [30](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_30) | \| 10003 \| 李四 \| 男 \| 0751-1234567 \| 广东佛山 \| 10040.11 \| | +| | [31](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_31) | \| 10004 \| 刘小强 \| 男 \| 0755-5555555 \| 广东深圳 \| 15010.23 \| | +| | [32](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_32) | \| 10005 \| 王艳 \| 女 \| NULL \| 广东广州 \| 14050.16 \| | +| | [33](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_33) | | +| | [34](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_34) | ***\*要求1：\****查询出薪资在12000~13000之间的员工信息。 | +| | [35](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_35) | | +| | [36](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_36) | ***\*要求2：\****查询出姓“刘”的员工的工号，姓名，家庭住址。 | +| | [37](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_37) | | +| | [38](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_38) | ***\*要求3：\****将“李四”的家庭住址改为“广东韶关” | +| | [39](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_39) | | +| | [40](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_40) | ***\*要求4：\****查询出名字中带“小”的员工 | +| | [41](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_41) | | +| | [42](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_42) | ***\*要求5：\****查询出薪资高于11000的男员工信息 | +| | [43](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_43) | | +| | [44](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_44) | ***\*要求6：\****查询没有登记电话号码的员工 | +| | [45](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_45) | | +| | [46](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_46) | ***\*要求7：\****查询薪资高于12000或者家是广东深圳、广州的男员工 | +| | [47](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_47) | | +| | [48](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_48) | ***\*要求8：\****查询每个员工的年薪，显示“姓名、年薪” | +| | [49](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_49) | | +| | [50](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_50) | ```mysql | +| | [51](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_51) | CREATE DATABASE staff CHARSET utf8; | +| | [52](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_52) | USE staff; | +| | [53](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_53) | CREATE TABLE emloyee( | +| | [54](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_54) | id INT, | +| | [55](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_55) | `name` VARCHAR(20), | +| | [56](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_56) | sex VARCHAR(20), | +| | [57](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_57) | tel VARCHAR(20), | +| | [58](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_58) | addr VARCHAR(50), | +| | [59](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_59) | salary FLOAT | +| | [60](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_60) | ); | +| | [61](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_61) | DESC emloyee; | +| | [62](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_62) | SELECT * FROM emloyee; | +| | [63](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_63) | INSERT INTO emloyee (id,name,sex,tel,addr,salary)VALUES | +| | [64](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_64) | (10001,'张一一','男','13456789000','广东韶关',10010.58), | +| | [65](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_65) | (10002,'刘小红','女','13454319000','广东江门',12010.21), | +| | [66](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_66) | (10003,'李四','男','0751-1234567','广东佛山',10040.11), | +| | [67](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_67) | (10004,'刘小强','男','0755-5555555','广东深圳',15010.23), | +| | [68](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_68) | (10005,'王艳','女',NULL,'广东广州',14050.16);) | +| | [69](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_69) | SELECT id,name,sex,tel,addr,salary FROM emloyee WHERE salary >=12000 AND salary <=13000; | +| | [70](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_70) | SELECT id,name,addr FROM emloyee WHERE name LIKE '刘%'; | +| | [71](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_71) | UPDATE emloyee SET addr = '广东韶关' WHERE NAME = '李四'; | +| | [72](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_72) | -- UPDATE emloyee SET sex = '女' WHERE name = '王艳'; | +| | [73](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_73) | SELECT name FROM emloyee WHERE NAME LIKE'%小%'; | +| | [74](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_74) | SELECT id,name,sex,tel,addr,salary FROM emloyee WHERE salary > 11000; | +| | [75](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_75) | SELECT id,name,sex,tel,addr,salary FROM emloyee WHERE tel IS null; | +| | [76](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_76) | SELECT id,name,sex,tel,addr,salary FROM emloyee WHERE salary >12000 \|\|addr in('广东深圳','广东广州')AND sex = '男'; | +| | [77](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_77) | SELECT id,name as 姓名,sex,tel,addr,salary as 年薪 FROM emloyee | +| | [78](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_78) | ``` | +| | [79](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_79) | | +| | [80](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_80) | ## 第2题：国家信息表 | +| | [81](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_81) | | +| | [82](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_82) | countries_info表中存储了国家名称、所属大陆、面积、人口和 GDP 值。 | +| | [83](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_83) | | +| | [84](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_84) | ```mysql | +| | [85](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_85) | DROP TABLE IF EXISTS `countries_info`; | +| | [86](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_86) | CREATE TABLE `countries_info`( | +| | [87](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_87) | `name` VARCHAR(100), | +| | [88](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_88) | `continent` VARCHAR(100), | +| | [89](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_89) | `area` INT, | +| | [90](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_90) | population INT, | +| | [91](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_91) | gdp BIGINT | +| | [92](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_92) | ); | +| | [93](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_93) | | +| | [94](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_94) | INSERT INTO countries_info VALUES | +| | [95](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_95) | ('Afghanistan','Asia',652230,25500100,20343000000), | +| | [96](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_96) | ('Albania','Europe',28748,2831741,12960000000), | +| | [97](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_97) | ('Algeria','Africa',2381741,37100000,188681000000), | +| | [98](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_98) | ('Andorra','Europe',468,78115,3712000000), | +| | [99](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_99) | ('Angola','Africa',1246700,20609294,100990000000); | +| | [100](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_100) | ``` | +| | [101](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_101) | | +| | [102](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_102) | 表数据样例： | +| | [103](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_103) | | +| | [104](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_104) | ```mysql | +| | [105](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_105) | +-------------+-----------+---------+------------+--------------+ | +| | [106](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_106) | \| name \| continent \| area \| population \| gdp \| | +| | [107](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_107) | +-------------+-----------+---------+------------+--------------+ | +| | [108](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_108) | \| Afghanistan \| Asia \| 652230 \| 25500100 \| 20343000000 \| | +| | [109](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_109) | \| Albania \| Europe \| 28748 \| 2831741 \| 12960000000 \| | +| | [110](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_110) | \| Algeria \| Africa \| 2381741 \| 37100000 \| 188681000000 \| | +| | [111](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_111) | \| Andorra \| Europe \| 468 \| 78115 \| 3712000000 \| | +| | [112](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_112) | \| Angola \| Africa \| 1246700 \| 20609294 \| 100990000000 \| | +| | [113](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_113) | +-------------+-----------+---------+------------+--------------+ | +| | [114](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_114) | ``` | +| | [115](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_115) | | +| | [116](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_116) | ***\*要求1：\**** 查询大国 的国家名称、人口和面积。 | +| | [117](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_117) | | +| | [118](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_118) | 如果一个国家满足下述两个条件之一，则认为该国是 大国 ： | +| | [119](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_119) | | +| | [120](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_120) | - 面积至少为 300万平方公里（即，3000000 km2） | +| | [121](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_121) | | +| | [122](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_122) | - 人口至少为 2500 万（即 25000000） | +| | [123](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_123) | | +| | [124](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_124) | ***\*要求2：\****查询属于亚洲的国家名称、所属大陆、面积、人口和 GDP 值 | +| | [125](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_125) | | +| | [126](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_126) | ***\*要求3：\****查询国土面积不足1万平方公里且人口不走10万人的国家信息 | +| | [127](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_127) | | +| | [128](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_128) | ***\*要求4：\****查询国家名字中包含“o“字母的国家信息 | +| | [129](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_129) | | +| | [130](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_130) | ***\*要求5：\****查询GDP值超过10000000000的国家信息 | +| | [131](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_131) | | +| | [132](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_132) | ***\*要求6：\****查询每个国家的人均贡献GDP值（GDP/人口总数）并显示为“国家名、人口、GDP值、人均贡献GDP值” | +| | [133](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_133) | | +| | [134](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_134) | ***\*要求7：\****查询人均贡献GDP值低于1000的国家信息。 | +| | [135](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_135) | | +| | [136](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_136) | ***\*要求8：\****查询每个国家的人均国土面积（面积/人口总数）并显示为“国家名、面积、人口、人均国土面积值” | +| | [137](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_137) | | +| | [138](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_138) | ```mysql | +| | [139](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_139) | DROP TABLE IF EXISTS `countries_info`; | +| | [140](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_140) | CREATE TABLE `countries_info`( | +| | [141](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_141) | `name` VARCHAR(100), | +| | [142](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_142) | `continent` VARCHAR(100), | +| | [143](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_143) | `area` INT, | +| | [144](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_144) | population INT, | +| | [145](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_145) | gdp BIGINT | +| | [146](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_146) | ); | +| | [147](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_147) | | +| | [148](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_148) | INSERT INTO countries_info VALUES | +| | [149](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_149) | ('Afghanistan','Asia',652230,25500100,20343000000), | +| | [150](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_150) | ('Albania','Europe',28748,2831741,12960000000), | +| | [151](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_151) | ('Algeria','Africa',2381741,37100000,188681000000), | +| | [152](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_152) | ('Andorra','Europe',468,78115,3712000000), | +| | [153](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_153) | ('Angola','Africa',1246700,20609294,100990000000); | +| | [154](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_154) | -- **要求1：** 查询大国 的国家名称、人口和面积。 | +| | [155](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_155) | -- | +| | [156](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_156) | -- 如果一个国家满足下述两个条件之一，则认为该国是 大国 ： | +| | [157](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_157) | -- | +| | [158](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_158) | -- - 面积至少为 300万平方公里（即，3000000 km2） | +| | [159](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_159) | -- | +| | [160](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_160) | -- - 人口至少为 2500 万（即 25000000） | +| | [161](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_161) | SELECT name as 大国,continent,area,population,gdp FROM countries_info WHERE area >=3000000 \|\| population >= 25000000; | +| | [162](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_162) | -- **要求2：**查询属于亚洲的国家名称、所属大陆、面积、人口和 GDP 值 | +| | [163](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_163) | SELECT name as 大国,continent,area,population,gdp FROM countries_info WHERE continent = 'Asia'; | +| | [164](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_164) | -- **要求3：**查询国土面积不足1万平方公里且人口不走10万人的国家信息 | +| | [165](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_165) | SELECT name as 大国,continent,area,population,gdp FROM countries_info WHERE area < 10000 && population < 100000; | +| | [166](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_166) | -- **要求4：**查询国家名字中包含“o“字母的国家信息 | +| | [167](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_167) | SELECT name as 大国,continent,area,population,gdp FROM countries_info WHERE name LIKE "%o%"; | +| | [168](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_168) | -- **要求5：**查询GDP值超过10000000000的国家信息 | +| | [169](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_169) | SELECT name as 大国,continent,area,population,gdp FROM countries_info WHERE gdp >10000000000; | +| | [170](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_170) | -- **要求6：**查询每个国家的人均贡献GDP值（GDP/人口总数）并显示为“国家名、人口、GDP值、人均贡献GDP值” | +| | [171](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_171) | SELECT name 国家名,population 人口,gdp GDP值,gdp/population FROM countries_info; | +| | [172](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_172) | SELECT 3712000000/468 | +| | [173](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_173) | -- **要求7：**查询人均贡献GDP值低于1000的国家信息。 | +| | [174](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_174) | SELECT name 国家名,area 国土,population 人口,gdp GDP值,gdp/population FROM countries_info WHERE gdp/population<1000; | +| | [175](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_175) | -- **要求8：**查询每个国家的人均国土面积（面积/人口总数）并显示为“国家名、面积、人口、人均国土面积值” | +| | [176](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_176) | SELECT name 国家名,area 国土,population 人口,gdp GDP值,area/population 人均国土 FROM countries_info; | +| | [177](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_177) | -- SELECT * FROM TABLE countries_info; | +| | [178](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_178) | | +| | [179](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_179) | | +| | [180](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_180) | | +| | [181](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_181) | SELECT * FROM `countries_info` | +| | [182](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_182) | CREATE DATABASE countries_info CHARSET utf8; | +| | [183](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_183) | use countries_info; | +| | [184](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_184) | CREATE TABLE `countries_info`( | +| | [185](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_185) | `name` VARCHAR(100), | +| | [186](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_186) | `continent` VARCHAR(100), | +| | [187](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_187) | `area` INT, | +| | [188](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_188) | population INT, | +| | [189](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_189) | gdp BIGINT | +| | [190](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_190) | ); | +| | [191](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_191) | INSERT INTO countries_info VALUES | +| | [192](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_192) | ('Afghanistan','Asia',652230,25500100,20343000000), | +| | [193](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_193) | ('Albania','Europe',28748,2831741,12960000000), | +| | [194](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_194) | ('Algeria','Africa',2381741,37100000,188681000000), | +| | [195](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_195) | ('Andorra','Europe',468,78115,3712000000), | +| | [196](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_196) | ('Angola','Africa',1246700,20609294,100990000000); | +| | [197](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_197) | SELECT name as 大国,continent,area,population,gdp FROM countries_info WHERE area >=3000000 \|\| population >= 25000000; | +| | [198](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_198) | SELECT name as 大国,continent,area,population,gdp FROM countries_info WHERE continent = 'Asia'; | +| | [199](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_199) | SELECT name as 大国,continent,area,population,gdp FROM countries_info WHERE area < 10000 && population < 100000; | +| | [200](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_200) | SELECT name as 大国,continent,area,population,gdp FROM countries_info WHERE name LIKE "%o%"; | +| | [201](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_201) | SELECT name as 大国,continent,area,population,gdp FROM countries_info WHERE gdp >10000000000; | +| | [202](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_202) | SELECT name as 国家,continent,area 人口,population,gdp GDP值,meangdp 人均GDP FROM countries_info; | +| | [203](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_203) | DESC countries_info; | +| | [204](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_204) | -- select ename 姓名,salary 工资,commission_pct 奖金比例, salary*(1+ifnull(commission_pct,0)) 实发工资 from t_employee ; | +| | [205](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_205) | -- 计算时ifnull(xx,代替值) 当xx是null时，用代替值计算 ifnull(commission_pct,0) | +| | [206](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_206) | SELECT name 国家名,area 人口,gdp GDP值,gdp/(IFNULL(meangdp,area)) 人均 FROM countries_info; | +| | [207](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_207) | #创建一个字符段里面放数据来查询 | +| | [208](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_208) | ALTER TABLE countries_info ADD meangdp DECIMAL; | +| | [209](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_209) | UPDATE countries_info SET meangdp = gdp/(IFNULL(meangdp,population)); | +| | [210](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_210) | UPDATE countries_info SET meangdp = NULL; | +| | [211](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_211) | SELECT `name`,continent,area,population,gdp,meangdp FROM countries_info WHERE meangdp<1000; | +| | [212](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_212) | SELECT `name`,continent,area,population,gdp/population mea FROM countries_info WHERE mea<1000; | +| | [213](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_213) | SELECT `name`,area,population,area/population FROM countries_info; | +| | [214](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_214) | SELECT * FROM `countries_info`; | +| | [215](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_215) | ``` | +| | [216](https://gitee.com/liu-shaohai/mysql-base/commit/5f99c28d5caaadd0689c2092852258087fc8e8d6#c33f5e0ca9f0c559f84b7cefbe3a1d2103153798_0_216) | | \ No newline at end of file -- Gitee