根据动力节点杜老师的视频以及《mysql必知必会》入门mysql
学习用数据库如下
复制进编辑 .sql文件，导入即可
drop table if exists dept;
drop table if exists salgrade;
drop table if exists emp;
create table dept(
deptno int(10) primary key,
dname varchar(14),
loc varchar(13)
);
create table salgrade(
grade int(11),
losal int(11),
hisal int(11)
);
create table emp(
empno int(4) primary key,
ename varchar(10),
job varchar(9),
mgr int(4),
hiredate date,
sal double(7,2),
comm double(7,2),
deptno int(2)
);
insert into dept(deptno,dname,loc) values(10,'ACCOUNTING','NEW YORK');
insert into dept(deptno,dname,loc) values(20,'RESEARCHING','DALLAS');
insert into dept(deptno,dname,loc) values(30,'SALES','CHICAGO');
insert into dept(deptno,dname,loc) values(40,'OPERATIONS','BOSTON');
insert into salgrade(grade,losal,hisal) values(1,700,1200);
insert into salgrade(grade,losal,hisal) values(2,1201,1400);
insert into salgrade(grade,losal,hisal) values(3,1401,2000);
insert into salgrade(grade,losal,hisal) values(4,2001,3000);
insert into salgrade(grade,losal,hisal) values(5,3001,5000);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7369,'SIMITH','CLERK',7902,'1980-12-17',800,null,20);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7499,'ALLEN','SALESMAN',7698,'1981-02-20',1600,300,30);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7521,'WARD','SALESMAN',7698,'1981-02-22',1250,500,30);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7566,'JONES','MANAGER',7839,'1981-04-02',2975,null,20);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7654,'MARTIN','SALESMAN',7698,'1981-09-28',1250,1400,30);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7698,'BLAKE','MANAGER',7839,'1981-05-01',2850,null,30);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7782,'CLARK','MANAGER',7839,'1981-06-09',2450,null,10);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7788,'SCOTT','ANALYST',7566,'1987-04-19',3000,null,20);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7839,'KING','PRESIDENT',null,'1981-11-17',5000,null,10);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7844,'TURNER','SALESMAN',7698,'1981-09-08',1500,null,30);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7876,'ADAMS','CLERK',7788,'1987-05-23',1100,null,20);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7900,'JAMES','CLERK',7698,'1981-12-03',950,null,30);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7902,'FORD','ANALYST',7566,'1981-12-03',3000,null,20);
insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno)
values(7934,'MILLER','CLERK',7782,'1982-01-23',1300,null,10);
select * from dept;
select * from salgrade;
select * from emp;
数据说明
+--------+-------------+----------+
|部门编号 | 部门名称 | 驻地 |
+--------+-------------+----------+
| deptno | dname | loc |
+--------+-------------+----------+
| 10 | ACCOUNTING | NEW YORK |
| 20 | RESEARCHING | DALLAS |
| 30 | SALES | CHICAGO |
| 40 | OPERATIONS | BOSTON |
+--------+-------------+----------+
+-------+-------+-------+
|工资等级| 下限 | 上限 |
+-------+-------+-------+
| grade | losal | hisal |
+-------+-------+-------+
| 1 | 700 | 1200 |
| 2 | 1201 | 1400 |
| 3 | 1401 | 2000 |
| 4 | 2001 | 3000 |
| 5 | 3001 | 5000 |
+-------+-------+-------+
+-------+--------+-----------+------+------------+---------+---------+--------+
|员工编号| 名字 | 职位 | 上级 | 入职时间 | 工资 | 津贴 |部门编号 |
+-------+--------+-----------+------+------------+---------+---------+--------+
| empno | ename | job | mgr | hiredate | sal | comm | deptno |
+-------+--------+-----------+------+------------+---------+---------+--------+
| 7369 | SIMITH | CLERK | 7902 | 1980-12-17 | 800.00 | NULL | 20 |
| 7499 | ALLEN | SALESMAN | 7698 | 1981-02-20 | 1600.00 | 300.00 | 30 |
| 7521 | WARD | SALESMAN | 7698 | 1981-02-22 | 1250.00 | 500.00 | 30 |
| 7566 | JONES | MANAGER | 7839 | 1981-04-02 | 2975.00 | NULL | 20 |
| 7654 | MARTIN | SALESMAN | 7698 | 1981-09-28 | 1250.00 | 1400.00 | 30 |
| 7698 | BLAKE | MANAGER | 7839 | 1981-05-01 | 2850.00 | NULL | 30 |
| 7782 | CLARK | MANAGER | 7839 | 1981-06-09 | 2450.00 | NULL | 10 |
| 7788 | SCOTT | ANALYST | 7566 | 1987-04-19 | 3000.00 | NULL | 20 |
| 7839 | KING | PRESIDENT | NULL | 1981-11-17 | 5000.00 | NULL | 10 |
| 7844 | TURNER | SALESMAN | 7698 | 1981-09-08 | 1500.00 | NULL | 30 |
| 7876 | ADAMS | CLERK | 7788 | 1987-05-23 | 1100.00 | NULL | 20 |
| 7900 | JAMES | CLERK | 7698 | 1981-12-03 | 950.00 | NULL | 30 |
| 7902 | FORD | ANALYST | 7566 | 1981-12-03 | 3000.00 | NULL | 20 |
| 7934 | MILLER | CLERK | 7782 | 1982-01-23 | 1300.00 | NULL | 10 |
+-------+--------+-----------+------+------------+---------+---------+--------+
