部門表

dept部門表(deptno部門編號/dname部門名稱/loc地點(diǎn)) create table dept (deptno numeric(2),dname varchar(14),loc varchar(13) );insert into dept values (10, 'ACCOUNTING', 'NEW YORK'); insert into dept values (20, 'RESEARCH', 'DALLAS'); insert into dept values (30, 'SALES', 'CHICAGO'); insert into dept values (40, 'OPERATIONS', 'BOSTON');

工資等級表

salgrade工資等級表(grade 等級/losal此等級的最低/hisal此等級的最高) create table salgrade (grade numeric,losal numeric,hisal numeric );insert into salgrade values (1, 700, 1200); insert into salgrade values (2, 1201, 1400); insert into salgrade values (3, 1401, 2000); insert into salgrade values (4, 2001, 3000); insert into salgrade values (5, 3001, 9999);

員工表

emp員工表(empno員工號/ename員工姓名/job工作/mgr上級編號/hiredate受雇日期/sal薪金/comm傭金/deptno部門編號) 工資 ＝ 薪金 ＋ 傭金
1.表自己跟自己連接

create table emp (empno numeric(4) not null,ename varchar(10),job varchar(9),mgr numeric(4),hiredate datetime,sal numeric(7, 2),comm numeric(7, 2),deptno numeric(2) );insert into emp values (7369, 'SMITH', 'CLERK', 7902, '1980-12-17', 800, null, 20); insert into emp values (7499, 'ALLEN', 'SALESMAN', 7698, '1981-02-20', 1600, 300, 30); insert into emp values (7521, 'WARD', 'SALESMAN', 7698, '1981-02-22', 1250, 500, 30); insert into emp values (7566, 'JONES', 'MANAGER', 7839, '1981-04-02', 2975, null, 20); insert into emp values (7654, 'MARTIN', 'SALESMAN', 7698, '1981-09-28', 1250, 1400, 30); insert into emp values (7698, 'BLAKE', 'MANAGER', 7839, '1981-05-01', 2850, null, 30); insert into emp values (7782, 'CLARK', 'MANAGER', 7839, '1981-06-09', 2450, null, 10); insert into emp values (7788, 'SCOTT', 'ANALYST', 7566, '1982-12-09', 3000, null, 20); insert into emp values (7839, 'KING', 'PRESIDENT', null, '1981-11-17', 5000, null, 10); insert into emp values (7844, 'TURNER', 'SALESMAN', 7698, '1981-09-08', 1500, 0, 30); insert into emp values (7876, 'ADAMS', 'CLERK', 7788, '1983-01-12', 1100, null, 20); insert into emp values (7900, 'JAMES', 'CLERK', 7698, '1981-12-03', 950, null, 30); insert into emp values (7902, 'FORD', 'ANALYST', 7566, '1981-12-03', 3000, null, 20); insert into emp values (7934, 'MILLER', 'CLERK', 7782, '1982-01-23', 1300, null, 10);

selsect

1查詢出部門編號為30的所有員工的編號和姓名

select deptno,empno,ename from emp where deptno=30 group by deptno,empno,ename

2.找出部門編號為10中所有經(jīng)理，和部門編號為20中所有銷售員的詳細(xì)資料

select * from emp where deptno=10 and job='manager' union all select * from emp where deptno=20 and job='salesman'

3.查詢所有員工詳細(xì)信息，用工資降序排序，如果工資相同使用入職日期升序排序

select empno,ename,job,mgr,hiredate,sal,comm,deptno, (sal+ifnull(comm,0)) as sal from emp order by sal desc,hiredate asc;

4.列出最低薪金大于1500的各種工作及從事此工作的員工人數(shù)。

select job, sum(sal)as sal, count(ename)as pcount from emp group by job having sum(sal)>1500

5.列出在銷售部工作的員工的姓名，假定不知道銷售部的部門編號。

select job,deptno from emp where job='salesman'

6.查詢姓名以S開頭的\以S結(jié)尾\包含S字符\第二個(gè)字母為L

select ename from emp where ename like 's%';

select ename from emp where ename like '%s';

select ename from emp where ename like '%s%';

select ename from emp where ename like '_l%';

7.查詢每種工作的最高工資、最低工資、人數(shù)

select job, max(sal+ifnull(comm,0)), min(sal+ifnull(comm,0)), count(empno) from emp group by job;

8.列出薪金 高于 公司平均薪金的所有員工號，員工姓名，所在部門名稱，上級領(lǐng)導(dǎo)，工資，工資等級

select e.empno,e.ename,d.dname,e.mgr,e.sal,s.grade from emp as e left join dept as d on e.deptno=d.deptno left join salgrade as s on e.sal>s.losal and e.sal<hisal where e.sal>(select avg(sal) from emp)

9.列出薪金 高于 在部門30工作的 所有/任何一個(gè)員工的薪金的員工姓名和薪金、部門名稱。

select e.ename,e.sal,d.dname from emp as e left join dept as d on e.deptno=d.deptno where e.sal>(select max(sal) from emp where deptno=30)select e.ename,e.sal,d.dname from emp as e left join dept as d on e.deptno=d.deptno where e.sal>(select min(sal) from emp where deptno=30)

總結(jié)

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