From bc2c4b87bb83c0160ddf9b7d2ef395367e029c47 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E2=80=98=E8=B5=B5=E6=B5=A9=E6=95=8F=E2=80=99?=
 <3127104562@qq.com>
Date: Thu, 15 Sep 2022 17:34:04 +0800
Subject: [PATCH 1/3] =?UTF-8?q?=E7=AC=AC=E4=B8=80=E6=AC=A1=E7=AC=94?=
 =?UTF-8?q?=E8=AE=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 ...2\350\241\250\347\272\246\346\235\237.sql" |  78 ++++++++++++++++++
 .../mintty.2022-09-15_16-58-57.png"           | Bin 0 -> 14084 bytes
 2 files changed, 78 insertions(+)
 create mode 100644 "2022--9--15\344\275\234\344\270\232\347\254\224\350\256\260/2022-09-15-\345\273\272\345\272\223\345\273\272\350\241\250\347\272\246\346\235\237.sql"
 create mode 100644 "2022--9--15\344\275\234\344\270\232\347\254\224\350\256\260/mintty.2022-09-15_16-58-57.png"

diff --git "a/2022--9--15\344\275\234\344\270\232\347\254\224\350\256\260/2022-09-15-\345\273\272\345\272\223\345\273\272\350\241\250\347\272\246\346\235\237.sql" "b/2022--9--15\344\275\234\344\270\232\347\254\224\350\256\260/2022-09-15-\345\273\272\345\272\223\345\273\272\350\241\250\347\272\246\346\235\237.sql"
new file mode 100644
index 0000000..ba0691a
--- /dev/null
+++ "b/2022--9--15\344\275\234\344\270\232\347\254\224\350\256\260/2022-09-15-\345\273\272\345\272\223\345\273\272\350\241\250\347\272\246\346\235\237.sql"
@@ -0,0 +1,78 @@
+--关系型数据库:SQL server, Mysql, Oracle 
+--创建数据库：create database 数据库名
+--database:数据库
+
+if exists (select * from sys.databases where name='DBTEST')
+ drop database DBTEST
+
+ create database DBTEST
+
+ --使用数据库
+ use dbtest
+
+ --创建班级表
+ create table ClassInfo(
+	ClassId int primary key identity(1,1),
+	ClassName varchar(20)
+ );
+
+ --插入数据： insert [into] 表名(字段名) values(值)
+ insert into ClassInfo( ClassName) values('软件1班');
+ 
+ insert ClassInfo values('软件2班')
+
+ select * from ClassInfo
+
+ --创建数据表
+ create table StuInfo(
+	stuId int primary key identity(1001,1),  --学生ID
+	--添加一个检查约束，判断用户插入/新增的数据，性别字段是不是男或者女
+	--default:默认约束
+	--check
+	stugender varchar(2) not null default('男') check(stugender='男' or stugender='女'),   --学生性别
+	stuphone char(11) check(len(stuphone)=11) unique,
+	--创建班级外键
+	--ClassID int references ClassInfo(ClassID)
+	ClassID int
+	
+ );
+
+
+ --增加外键
+ --修改表结构 表名 add constraint 约束名 foreign key(要引用的字段) references 主键表(字段)
+ Alter table StuInfo add constraint FK_StuInfo_ClassId foreign key(ClassID) references ClassInfo(ClassID)
+
+
+ --新增姓名列
+ alter table StuInfo add stuName varchar(20)
+
+
+
+ --如果没给出列名，默认是按照顺序一个个添加
+ --insert StuInfo values('女',13888888888)
+
+ --insert StuInfo(stuphone) values(15888888888)
+
+
+
+ select * from StuInfo;
+
+ --字符串：char(5),varchar(5),nvarchar(5)之间区别是什么
+
+
+
+ --删除表:drop table 表名
+ drop table StuInfo
+
+
+ --非空
+
+ --约束，自增(标识列)
+
+ --外键
+ --主键：默认唯一列
+ --默认
+ --唯一：
+ --check检查:
+
+ --插入数据：insert into
\ No newline at end of file
diff --git "a/2022--9--15\344\275\234\344\270\232\347\254\224\350\256\260/mintty.2022-09-15_16-58-57.png" "b/2022--9--15\344\275\234\344\270\232\347\254\224\350\256\260/mintty.2022-09-15_16-58-57.png"
new file mode 100644
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-- 
Gitee


From e7cb7cce8c5921d19418591f816d084eca4fcc6b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=B5=B5=E6=B5=A9=E6=95=8F?= <3127104562@qq.com>
Date: Thu, 15 Sep 2022 10:26:38 +0000
Subject: [PATCH 2/3] =?UTF-8?q?=E5=88=A0=E9=99=A4=E6=96=87=E4=BB=B6=202022?=
 =?UTF-8?q?--9--15=E4=BD=9C=E4=B8=9A=E7=AC=94=E8=AE=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 ...2\350\241\250\347\272\246\346\235\237.sql" |  78 ------------------
 .../mintty.2022-09-15_16-58-57.png"           | Bin 14084 -> 0 bytes
 2 files changed, 78 deletions(-)
 delete mode 100644 "2022--9--15\344\275\234\344\270\232\347\254\224\350\256\260/2022-09-15-\345\273\272\345\272\223\345\273\272\350\241\250\347\272\246\346\235\237.sql"
 delete mode 100644 "2022--9--15\344\275\234\344\270\232\347\254\224\350\256\260/mintty.2022-09-15_16-58-57.png"

diff --git "a/2022--9--15\344\275\234\344\270\232\347\254\224\350\256\260/2022-09-15-\345\273\272\345\272\223\345\273\272\350\241\250\347\272\246\346\235\237.sql" "b/2022--9--15\344\275\234\344\270\232\347\254\224\350\256\260/2022-09-15-\345\273\272\345\272\223\345\273\272\350\241\250\347\272\246\346\235\237.sql"
deleted file mode 100644
index ba0691a..0000000
--- "a/2022--9--15\344\275\234\344\270\232\347\254\224\350\256\260/2022-09-15-\345\273\272\345\272\223\345\273\272\350\241\250\347\272\246\346\235\237.sql"
+++ /dev/null
@@ -1,78 +0,0 @@
---关系型数据库:SQL server, Mysql, Oracle 
---创建数据库：create database 数据库名
---database:数据库
-
-if exists (select * from sys.databases where name='DBTEST')
- drop database DBTEST
-
- create database DBTEST
-
- --使用数据库
- use dbtest
-
- --创建班级表
- create table ClassInfo(
-	ClassId int primary key identity(1,1),
-	ClassName varchar(20)
- );
-
- --插入数据： insert [into] 表名(字段名) values(值)
- insert into ClassInfo( ClassName) values('软件1班');
- 
- insert ClassInfo values('软件2班')
-
- select * from ClassInfo
-
- --创建数据表
- create table StuInfo(
-	stuId int primary key identity(1001,1),  --学生ID
-	--添加一个检查约束，判断用户插入/新增的数据，性别字段是不是男或者女
-	--default:默认约束
-	--check
-	stugender varchar(2) not null default('男') check(stugender='男' or stugender='女'),   --学生性别
-	stuphone char(11) check(len(stuphone)=11) unique,
-	--创建班级外键
-	--ClassID int references ClassInfo(ClassID)
-	ClassID int
-	
- );
-
-
- --增加外键
- --修改表结构 表名 add constraint 约束名 foreign key(要引用的字段) references 主键表(字段)
- Alter table StuInfo add constraint FK_StuInfo_ClassId foreign key(ClassID) references ClassInfo(ClassID)
-
-
- --新增姓名列
- alter table StuInfo add stuName varchar(20)
-
-
-
- --如果没给出列名，默认是按照顺序一个个添加
- --insert StuInfo values('女',13888888888)
-
- --insert StuInfo(stuphone) values(15888888888)
-
-
-
- select * from StuInfo;
-
- --字符串：char(5),varchar(5),nvarchar(5)之间区别是什么
-
-
-
- --删除表:drop table 表名
- drop table StuInfo
-
-
- --非空
-
- --约束，自增(标识列)
-
- --外键
- --主键：默认唯一列
- --默认
- --唯一：
- --check检查:
-
- --插入数据：insert into
\ No newline at end of file
diff --git "a/2022--9--15\344\275\234\344\270\232\347\254\224\350\256\260/mintty.2022-09-15_16-58-57.png" "b/2022--9--15\344\275\234\344\270\232\347\254\224\350\256\260/mintty.2022-09-15_16-58-57.png"
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-- 
Gitee


From 2d545a789fc6670525b71e2f8ae4f418fdbe4298 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=B5=B5=E6=B5=A9=E6=95=8F?= <3127104562@qq.com>
Date: Thu, 15 Sep 2022 18:41:54 +0800
Subject: [PATCH 3/3] =?UTF-8?q?9=E6=9C=8815=E5=8F=B7=E7=AC=94=E8=AE=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../SQLQuery1.sql"                            | 55 +++++++++++++
 ...60\346\215\256\345\233\236\346\273\232.md" | 10 +++
 ...2\350\241\250\347\272\246\346\235\237.sql" | 78 +++++++++++++++++++
 3 files changed, 143 insertions(+)
 create mode 100644 "27\345\217\267\350\265\265\346\265\251\346\225\217/2022-9-15\344\275\234\344\270\232/SQLQuery1.sql"
 create mode 100644 "27\345\217\267\350\265\265\346\265\251\346\225\217/2022-9-15\347\254\224\350\256\260/1.1\346\225\260\346\215\256\345\233\236\346\273\232.md"
 create mode 100644 "27\345\217\267\350\265\265\346\265\251\346\225\217/2022-9-15\347\254\224\350\256\260/2022-09-15-\345\273\272\345\272\223\345\273\272\350\241\250\347\272\246\346\235\237.sql"

diff --git "a/27\345\217\267\350\265\265\346\265\251\346\225\217/2022-9-15\344\275\234\344\270\232/SQLQuery1.sql" "b/27\345\217\267\350\265\265\346\265\251\346\225\217/2022-9-15\344\275\234\344\270\232/SQLQuery1.sql"
new file mode 100644
index 0000000..df71103
--- /dev/null
+++ "b/27\345\217\267\350\265\265\346\265\251\346\225\217/2022-9-15\344\275\234\344\270\232/SQLQuery1.sql"
@@ -0,0 +1,55 @@
+--创建数据库 DBTEST
+create database DBTEST
+use DBTEST
+create table  sectionInfo(
+sectionID  int primary key identity(1,1),
+ sectionName  varchar(10) not null
+)
+insert into sectionInfo values('小敏'),('小明'),('小笑'),('小白'),('小黑')
+
+create table  userInfo(
+userNo    int primary key identity(1,1) not null,
+ userName  varchar(10) unique  not null,
+ userSex   varchar(2) not null check(userSex='男' or userSex='女'),
+ userAge   int not null,
+ userAddress  varchar(50) default('湖北'),
+ userSection int references sectionInfo(sectionID)
+)
+drop table userInfo
+insert into userInfo values('小敏','女',20,'湖南',5),('小明','女',18,'武汉',2),('小笑','女',20,'湖南',2),('小白','女',20,'湖南',5),('小黑','女',20,'湖南',5)
+create table workInfo(
+workId int primary key not null,
+userId  int references userInfo(userNo),
+workTime datetime not null,
+workDescription  varchar(40) not null check(workDescription='迟到'or workDescription='早退'or workDescription='旷工' or   workDescription='病假' or workDescription='事假')
+
+)
+insert into workInfo values(1,1,'2022/9/15','迟到'),(2,2,'2022/9/15','迟到'),(3,3,'2022/9/15','迟到'),(4,4,'2022/9/15','迟到'),(5,5,'2022/9/15','病假')
+
+
+
+--  再创建表：
+
+	--部门信息表（sectionInfo）
+	--部门编号  sectionID  int 标识列  主键
+	--部门名称  sectionName  varchar(10)  不能为空
+
+	--	员工信息表（userInfo）
+	--	员工编号  userNo  int  标识列 主键  不允许为空
+	--	员工姓名  userName  varchar(10)  唯一约束 不允许为空 长度必须大于4
+	--	员工性别  userSex   varchar(2)  不允许为空  只能是男或女
+	/**员工年龄  userAge   int  不能为空  范围在1-100之间
+	员工地址  userAddress  varchar(50)  默认值为“湖北”
+	员工部门  userSection  int  外键，引用部门信息表的部门编号
+
+
+	员工考勤表（workInfo）
+	考勤编号  workId int 标识列  主键  不能为空
+	考勤员工  userId  int 外键 引用员工信息表的员工编号 不能为空
+	考勤时间  workTime datetime 不能为空
+	考勤说明  workDescription  varchar(40) 不能为空 内容只能是“迟到”，“早退”，“旷工”，“病假”，“事假”中的一种
+
+
+    为每张表添加5条测试数据**/
+
+
diff --git "a/27\345\217\267\350\265\265\346\265\251\346\225\217/2022-9-15\347\254\224\350\256\260/1.1\346\225\260\346\215\256\345\233\236\346\273\232.md" "b/27\345\217\267\350\265\265\346\265\251\346\225\217/2022-9-15\347\254\224\350\256\260/1.1\346\225\260\346\215\256\345\233\236\346\273\232.md"
new file mode 100644
index 0000000..484590b
--- /dev/null
+++ "b/27\345\217\267\350\265\265\346\265\251\346\225\217/2022-9-15\347\254\224\350\256\260/1.1\346\225\260\346\215\256\345\233\236\346\273\232.md"
@@ -0,0 +1,10 @@
+#                 1.1鏁版嵁鍥炴粴
+
+## 1.1.1绗竴姝� $ git log锛堟壘鍒版渶鍒濆鐨勬棩蹇楃爜锛�
+
+## 1.1.2绗簩閮ㄧ湅閭ｄ釜瑕佸垹鐨勬枃浠剁爜锛坈ommit dbdec1be9fe646f9942ae0b364dfc6609075c4c1锛�
+
+## 1.1.3绗笁姝� 杩愮敤閭ｄ釜鏂囦欢鐮佹墽琛屽垹闄� $ git reset --hard dbdec1be9fe646f9942ae0b364dfc6609075c4c1 
+
+## 1.1.4绗洓姝� $ git push -f 鐧诲綍鑷繁鐨勭爜浜戣处鍙�
+
diff --git "a/27\345\217\267\350\265\265\346\265\251\346\225\217/2022-9-15\347\254\224\350\256\260/2022-09-15-\345\273\272\345\272\223\345\273\272\350\241\250\347\272\246\346\235\237.sql" "b/27\345\217\267\350\265\265\346\265\251\346\225\217/2022-9-15\347\254\224\350\256\260/2022-09-15-\345\273\272\345\272\223\345\273\272\350\241\250\347\272\246\346\235\237.sql"
new file mode 100644
index 0000000..ba0691a
--- /dev/null
+++ "b/27\345\217\267\350\265\265\346\265\251\346\225\217/2022-9-15\347\254\224\350\256\260/2022-09-15-\345\273\272\345\272\223\345\273\272\350\241\250\347\272\246\346\235\237.sql"
@@ -0,0 +1,78 @@
+--关系型数据库:SQL server, Mysql, Oracle 
+--创建数据库：create database 数据库名
+--database:数据库
+
+if exists (select * from sys.databases where name='DBTEST')
+ drop database DBTEST
+
+ create database DBTEST
+
+ --使用数据库
+ use dbtest
+
+ --创建班级表
+ create table ClassInfo(
+	ClassId int primary key identity(1,1),
+	ClassName varchar(20)
+ );
+
+ --插入数据： insert [into] 表名(字段名) values(值)
+ insert into ClassInfo( ClassName) values('软件1班');
+ 
+ insert ClassInfo values('软件2班')
+
+ select * from ClassInfo
+
+ --创建数据表
+ create table StuInfo(
+	stuId int primary key identity(1001,1),  --学生ID
+	--添加一个检查约束，判断用户插入/新增的数据，性别字段是不是男或者女
+	--default:默认约束
+	--check
+	stugender varchar(2) not null default('男') check(stugender='男' or stugender='女'),   --学生性别
+	stuphone char(11) check(len(stuphone)=11) unique,
+	--创建班级外键
+	--ClassID int references ClassInfo(ClassID)
+	ClassID int
+	
+ );
+
+
+ --增加外键
+ --修改表结构 表名 add constraint 约束名 foreign key(要引用的字段) references 主键表(字段)
+ Alter table StuInfo add constraint FK_StuInfo_ClassId foreign key(ClassID) references ClassInfo(ClassID)
+
+
+ --新增姓名列
+ alter table StuInfo add stuName varchar(20)
+
+
+
+ --如果没给出列名，默认是按照顺序一个个添加
+ --insert StuInfo values('女',13888888888)
+
+ --insert StuInfo(stuphone) values(15888888888)
+
+
+
+ select * from StuInfo;
+
+ --字符串：char(5),varchar(5),nvarchar(5)之间区别是什么
+
+
+
+ --删除表:drop table 表名
+ drop table StuInfo
+
+
+ --非空
+
+ --约束，自增(标识列)
+
+ --外键
+ --主键：默认唯一列
+ --默认
+ --唯一：
+ --check检查:
+
+ --插入数据：insert into
\ No newline at end of file
-- 
Gitee