Oracle SQL：经典查询练手第一篇

发表于：2011-6-27 10:33

作者：胡勇来源：51Testing软件测试网采编

--------14．列出所有员工的姓名、部门名称和工资。---------
SQL> select a.ename,(select b.dname from dept b where b.deptno=a.deptno) as deptname,sal from emp a;
ENAME DEPTNAME SAL
---------- -------------- ---------
SMITH RESEARCH 800.00
ALLEN SALES 1600.00
WARD SALES 1250.00
JONES RESEARCH 2975.00
MARTIN SALES 1250.00
BLAKE SALES 2850.00
CLARK ACCOUNTING 2450.00
SCOTT RESEARCH 4000.00
KING ACCOUNTING 5000.00
TURNER SALES 1500.00
ADAMS RESEARCH 1100.00
JAMES SALES 950.00
FORD RESEARCH 3000.00
MILLER ACCOUNTING 1300.00
EricHu ACCOUNTING 5500.00
huyong ACCOUNTING 5500.00
WANGJING ACCOUNTING 5500.00
17 rows selected

--------15．列出所有部门的详细信息和部门人数。---------
SQL> select a.deptno,a.dname,a.loc,(select count(deptno) from emp b where b.deptno=a.deptno group by b.deptno) as deptcount from dept a;
DEPTNO DNAME LOC DEPTCOUNT
------ -------------- ------------- ----------
10 ACCOUNTING NEW YORK 6
20 RESEARCH DALLAS 5
30 SALES CHICAGO 6
40 OPERATIONS BOSTON
50 50abc 50def
60 Developer HaiKou
6 rows selected

--------17．列出各个部门的MANAGER（经理）的最低薪金。--------
SQL> select deptno,min(sal) from emp where job='MANAGER' group by deptno;
DEPTNO MIN(SAL)
------ ----------
10 2450
20 2975
30 2850

--------18．列出所有员工的年工资,按年薪从低到高排序。---------
SQL> select ename,(sal+nvl(comm,0))*12 as salpersal from emp order by salpersal;
ENAME SALPERSAL
---------- ----------
SMITH 9600
JAMES 11400
ADAMS 13200
MILLER 15600
TURNER 18000
WARD 21000
ALLEN 22800
CLARK 29400
MARTIN 31800
BLAKE 34200
JONES 35700
FORD 36000
SCOTT 48000
KING 60000
EricHu 66168
huyong 66168
WANGJING 66168
17 rows selected