From 817d30f496f25c0ac8b58a5b29890f21a9eda0a9 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E9=82=B9=E4=BA=A8=E4=BC=9F?= <529310475@qq.com> Date: Fri, 10 Mar 2023 12:59:34 +0800 Subject: [PATCH 1/2] =?UTF-8?q?=E5=BE=97=E5=85=AD=E6=AC=A1=E4=BD=9C?= =?UTF-8?q?=E4=B8=9A?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../WWWW3.09.md" | 156 ++++++++++++++++++ 1 file changed, 156 insertions(+) create mode 100644 "11 \351\202\271\344\272\250\344\274\237/WWWW3.09.md" diff --git "a/11 \351\202\271\344\272\250\344\274\237/WWWW3.09.md" "b/11 \351\202\271\344\272\250\344\274\237/WWWW3.09.md" new file mode 100644 index 0000000..3c19249 --- /dev/null +++ "b/11 \351\202\271\344\272\250\344\274\237/WWWW3.09.md" @@ -0,0 +1,156 @@ +``` +create database xiaoshuo charset utf8; +use xiaoshuo; +1 +create table author( +author_id int primary key, +author_name varchar(20) not null unique, +credits int, +vip_id varchar(20) not null, +foreign key(vip_id) references vip(vip_id) +); +2 +create table vip( +vip_id varchar(20) primary key, +vip_name varchar(20) not null unique +); +3 +create table story( +story_id int primary key auto_increment, +author_id int, +foreign key(author_id) references author(author_id), +type_id varchar(20), +foreign key(type_id) references type(type_id), +story_name varchar(50), +views_number int +); +4 +create table type( +type_id varchar(20) primary key, +type_name varchar(20) not null unique +); +insert into author values + (1001,'朱逸群',600,'VIP02'), + (1002,'范建',8510,'VIP04'), + (1003,'史珍香',981,'VIP02'), + (1004,'范统',2364,'VIP02'), + (1005,'杜子腾',257,'VIP01'), + (1006,'刘产',678,'VIP02'), + (1007,'杜琦燕',438,'VIP03'); + insert into vip values + ('VIP01','青铜作家'), + ('VIP02','白银作家'), + ('VIP03','黄金作家'), + ('VIP04','钻石作家'); + insert into story values + (1,1002,'L03','母猪产后与护理师的二三事',6541), + (2,1005,'L04','拖拉机大战蜘蛛侠',563), + (3,1003,'L01','这只小龙虾不正经',8754), + (4,1006,'L04','一个爹爹三个娃',36354), + (5,1006,'L01','皇上滚开本宫只劫财',3674), + (6,1005,'L05','给长城贴瓷砖的小太监',6541), + (7,1003,'L03','不科学御兽',1257), + (8,1005,'L01','镜面管理局',3216), + (9,1004,'L02','关于我成为灭魂师之后',1147), + (10,1004,'L05','公子别秀',2078); +insert into type values + ('L01','玄幻'), + ('L02','奇幻'), + ('L03','武侠'), + ('L04','仙侠'), + ('L05','都市'); +``` + +-- 1. 根据前面提供的表结构和表数据,创建数据库并分别创建这张四张表;并插入相关数据。(提醒:外键 +-- 请注意建表顺序和插入数据的顺序) (30分) +-- 2. 将story 表中的story_name字段类型改成varchar(40) 。(2分) + +``` +alter table story modify story_name varchar(40); +``` + +-- 3. 在author表中增加一个性别字段 字段名:author_sex,类型: char(10),要求默认值为'男'。 (3分) + +``` +alter table author add author_sex char(10) DEFAULT '男'; +``` + +-- 4. 将作家编号为1005、1007的作家性别改为'女' 。(2分) + +``` +update author set author_sex='女' where author_id='1005' or author_id='1007'; +``` + +-- 5. 作家杜子腾,写了一篇名为《拜登夸我很帅》的都市小说,有854个浏览量,请将这条信息插入到story +-- 表。(3分) + +``` +insert into story values(11,1005,'L05','拜登夸我很帅',854); +``` + +-- 6. 《拖拉机大战蜘蛛侠》这篇小说,浏览量涨了100,请更新story表中的相关数据。(2分) + +``` +update story set views_number=views_number+100 where story_name='拖拉机大战蜘蛛侠'; +``` + +-- 7. 请删除story表的中《皇上滚开本宫只劫财》这篇小说相关数据。(2分) + +``` +delete from story where story_name='皇上滚开本宫只劫财'; +``` + +-- 8. 查询 浏览量大于 8000的小说的作者编号和小说作品名称。(2分) + +``` +select * from story where views_number>8000; +``` + +-- 9. 查询积分大于1000 并且会员等级高于vip03的作家所有信息。(3分) + +``` +SELECT * FROM author where credits>1000 and vip_id>'vip03'; +``` + +-- 10. 查询姓名以杜字开头的作家的姓名,积分和等级编号。(3分) + +``` +select author_name,credits,vip_id from author where author_name like '杜_%'; +``` + +-- 11. 查询积分在100、1000之间的作家信息,以积分降序排列。 (3分) + +``` +select * from author where credits between 100 and 1000 order by credits desc; +``` + +-- 12. 查询出小说的总浏览量,最高浏览量,最小浏览量,平均浏览量,给字段用上中文别名。(3分) + +``` +select sum(views_number) 总浏览量,max(views_number) 最高浏览量,min(views_number) 最小浏览量,avg(views_number) 平均浏览量 from story; +``` + +-- 13. 查询各种等级的作家的平均积分和作家数量,并对查询结果使用中文别名。(3分) +-- 14. 查询小说数量大于等于2的分类编号和小说数量。(4分) + +``` +select type_id,count(type_id) 小说数量 from story where type_id>='L02' group by type_id; +``` + +-- 15. 查询所有小说中浏览量最少的书的作品编号、作品名称和类型编号、浏览量。(4分) +-- 16. 查询积分比刘产高的作者所有信息。(5分) + +``` +select * from author where credits > (select credits from author where author_name='刘产'); +``` + +-- 17. 查询出哪些白银作家是没有写小说的,显示这些作家的姓名、等级名称。(8分) + +-- 18. 找出写过作品浏览量大于5000的作家的所有作品中浏览量不到1000的作品信息(8分) + +``` +select * from story where author_id in (select author_id from story where views_number>5000) and views_number<1000; +``` + +-- 19. 查询所有小说的小说编号、小说名称、浏览量、分类名称、作者姓名、作者积分、作者等级名称,结果 +-- 字段要用中文别名,并按浏览量降序排列,如果浏览量一样的,再按积分降序排列。(10分) \ No newline at end of file -- Gitee From 1a7dd0426ab0fc64b3a6e1cbe0c25a56d7f78137 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E9=82=B9=E4=BA=A8=E4=BC=9F?= <529310475@qq.com> Date: Fri, 10 Mar 2023 13:40:00 +0800 Subject: [PATCH 2/2] =?UTF-8?q?=E5=BE=97=E5=85=AD=E6=AC=A1=E4=BD=9C?= =?UTF-8?q?=E4=B8=9A?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- .../20230309.md" | 0 1 file changed, 0 insertions(+), 0 deletions(-) rename "11 \351\202\271\344\272\250\344\274\237/WWWW3.09.md" => "11 \351\202\271\344\272\250\344\274\237/20230309.md" (100%) diff --git "a/11 \351\202\271\344\272\250\344\274\237/WWWW3.09.md" "b/11 \351\202\271\344\272\250\344\274\237/20230309.md" similarity index 100% rename from "11 \351\202\271\344\272\250\344\274\237/WWWW3.09.md" rename to "11 \351\202\271\344\272\250\344\274\237/20230309.md" -- Gitee