diff --git "a/\344\275\234\344\270\232/\344\275\234\344\270\232.sql" "b/\344\275\234\344\270\232/\344\275\234\344\270\232.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..8266a0bdbf79d7e57574c6a57b0c10512b74a36a
--- /dev/null
+++ "b/\344\275\234\344\270\232/\344\275\234\344\270\232.sql"
@@ -0,0 +1,98 @@
+create database DBTEST;
+use DBTEST;
+
+
+--部门信息表
+create table sectionInfo(
+
+--部门编号
+ sectionID int primary key identity (1001,1),
+
+--部门名称 
+ sectionName varchar(10) not null
+
+);
+
+
+insert into sectionInfo (sectionName) values ('销售部');
+insert into sectionInfo (sectionName) values('财务部');
+insert into sectionInfo (sectionName) values('前端开发部');
+insert into sectionInfo (sectionName) values('后端开发部');
+insert into sectionInfo (sectionName) values('测试部');
+
+
+select * from sectionInfo;
+
+
+--员工信息表
+create table userInfo(
+
+--员工编号
+  userNo int primary key identity (2001,1) not null,
+
+  --员工姓名
+ userName  varchar(10) not null unique check(len(UserName)>4),
+ 
+--员工性别 
+ userSex varchar(2) not null check(userSex='男'or userSex='女'),
+
+ --员工年龄 
+ userAge int not null check(1<=userAge or userAge <=100),
+ 
+--员工地址 
+ userAddress varchar(50) default('湖北'),
+
+--员工部门，外键引用部门信息表的部门编号
+ userSection int 
+);
+
+
+select * from userInfo;
+
+
+insert into userInfo(userName,userSex,userAge,userAddress,userSection) values('张三三三三','男',22,'湖北',1001);
+insert into userInfo(userName,userSex,userAge,userAddress,userSection) values('李四四四四','男',28,'湖北',1002);
+insert into userInfo(userName,userSex,userAge,userAddress,userSection) values('王五五五五','男',35,'湖北',1003);
+insert into userInfo(userName,userSex,userAge,userAddress,userSection) values('黄丽丽丽丽','女',22,'湖北',1004);
+insert into userInfo(userName,userSex,userAge,userAddress,userSection) values('马蓉蓉蓉蓉','女',56,'湖北',1005);
+
+
+
+--员工考勤表
+create table workinfo(
+
+--考勤编号
+workID int primary key not null identity(3001,1),
+
+--考勤员工,外键,引用的是员工信息表的员工编号
+userId int  not null,
+
+--考勤时间
+workTime datetime not null,
+
+--考勤说明，内容只能是“迟到”，“早退”，“旷工”，“病假”，“事假”中的一种
+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(userId,workTime,workDescription) values (2007,2021-2-11,'迟到');
+insert into  workinfo(userId,workTime,workDescription) values (2008,2022-3-13,'早退');
+insert into  workinfo(userId,workTime,workDescription) values (2009,2021-1-19,'旷工');
+insert into  workinfo(userId,workTime,workDescription) values (2010,2022-7-1,'病假');
+insert into  workinfo(userId,workTime,workDescription) values (2011,2022-6-24,'事假');
+
+select * from workinfo;
+
+
+--外键
+
+--员工信息表连部门表
+ Alter table userInfo add constraint aaa foreign key (userSection) references sectionInfo(sectionID);
+
+--员工考勤表连员工信息表
+Alter table workinfo add constraint  bbb foreign key (userId) references userInfo(userNo);
+
+
diff --git "a/\344\275\234\344\270\232/\347\254\224\350\256\260.txt" "b/\344\275\234\344\270\232/\347\254\224\350\256\260.txt"
new file mode 100644
index 0000000000000000000000000000000000000000..8036792692f7850f9128372924aa239a67940889
--- /dev/null
+++ "b/\344\275\234\344\270\232/\347\254\224\350\256\260.txt"
@@ -0,0 +1,19 @@
+create database锛堝缓鏁版嵁搴擄級 DBTEST(鏁版嵁搴撳悕绉�);
+use DBTEST;锛堜娇鐢ㄦ暟鎹簱锛�
+
+
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+璇彞1
+璇彞2
+.....
+
+锛�
+primary key 鏄富閿�
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+鍏朵腑鍋囧 闇�瑕佺殑闇�姹傛槸澶т簬1灏忎簬100鏄棤娉昪heck锛�1<鍒楀悕<100锛夌殑浜嗭紝寰楃敤or锛堟垨鑰咃級鏉ュ紕check锛�1<鍒楀悕 or  鍒楀悕>100锛�
+
+
+娣诲姞澶栭敭鐨勬柟娉曟湁涓ょ鍏朵腑 Alter table 鐨勬剰鎬濇槸淇敼琛ㄧ粨鏋� 鎵�浠ユ槸鍦ㄥ悗闈㈣繘琛屾坊鍔犵殑 add灏辨槸娣诲姞鐨勬剰鎬� constraint涔熷氨鏄浐瀹氱粨鏋� 鍚庨潰璺熷閿悕绉帮紝foreign key涔熸槸鍥哄畾 锛堬級
+Alter table userInfo add constraint aaa foreign key (userSection) references sectionInfo(sectionID);
\ No newline at end of file