SQL简单语句总结习题

              --创建一个表
create table  plspl_company_info(
              empno number(5) not null, 
              ename varchar2(10) not null,
              job varchar2(10),
              manager number(5),
              hiredate date,
              sal  number(5),
              comm  number(5),
              deptno number(3)
              );
            
insert into plspl_company_info values (7369, ‘SMITH‘, ‘CLERK‘, 7902, date ‘1980-12-17‘, 800, NULL, 10);
insert into plspl_company_info values (7293, ‘ALLEN‘, ‘SALESMAN‘, 7689, date ‘1981-03-27‘, 1867, NULL, 20);
insert into plspl_company_info values (7562, ‘JAMES‘, ‘SALESMAN‘, 7689, date ‘1981-09-11‘, 1796, NULL, 20);
insert into plspl_company_info values (7936, ‘JONES‘, ‘ANAYST‘, 7656, date ‘1980-09-01‘, 3250, NULL, 30);
insert into plspl_company_info values (7688, ‘WEST‘, ‘MANAGER‘, 7839, date ‘1981-02-28‘, 2985, 900, 40);
insert into plspl_company_info values (7499, ‘PAUL‘, ‘MANAGER‘, 7839, date ‘1980-03-26‘, 3600, NULL, 40);
insert into plspl_company_info values (7778, ‘FORD‘, ‘CLERK‘, 7902, date ‘1987-04-17‘, 960, NULL, 10);
insert into plspl_company_info values (7289, ‘ADAMS‘, ‘SALESMAN‘, 7689, date ‘1980-01-09‘, 1956, NULL, 20);
insert into plspl_company_info values (7531, ‘MATIN‘, ‘SALESMAN‘, 7689, date ‘1980-05-14‘, 1906, NULL, 20);
insert into plspl_company_info values (7916, ‘KING‘, ‘ANAYST‘, 7656, date ‘1982-06-04‘, 2864, NULL, 30);
insert into plspl_company_info values (7365, ‘BLKAE‘, ‘CLERK‘, 7902, date ‘1981-09-11‘, 1200, 1100, 10);
insert into plspl_company_info values (7784, ‘CHRIS‘, ‘CLERK‘, 7902, date ‘1981-07-16‘, 1376, NULL, 10);

select * from plspl_company_info;


执行结果：

SQL>

Table created

1 row inserted

1 row inserted

1 row inserted

1 row inserted

1 row inserted

1 row inserted

1 row inserted

1 row inserted

1 row inserted

1 row inserted

1 row inserted

1 row inserted

EMPNO ENAME JOB MANAGER HIREDATE SAL COMM DEPTNO
------ ---------- ---------- ------- ----------- ------ ------ ------
7369 SMITH CLERK 7902 1980/12/17 800 10
7293 ALLEN SALESMAN 7689 1981/3/27 1867 20
7562 JAMES SALESMAN 7689 1981/9/11 1796 20
7936 JONES ANAYST 7656 1980/9/1 3250 30
7688 WEST MANAGER 7839 1981/2/28 2985 900 40
7499 PAUL MANAGER 7839 1980/3/26 3600 40
7778 FORD CLERK 7902 1987/4/17 960 10
7289 ADAMS SALESMAN 7689 1980/1/9 1956 20
7531 MATIN SALESMAN 7689 1980/5/14 1906 20
7916 KING ANAYST 7656 1982/6/4 2864 30
7365 BLKAE CLERK 7902 1981/9/11 1200 1100 10
7784 CHRIS CLERK 7902 1981/7/16 1376 10

12 rows selected

SQL>

select * from plspl_company_info where deptno = 30;

select ename, empno , deptno from  plspl_company_info where job = ‘CLERK‘;

select * from plspl_company_info where comm > sal*0.6 ;

select * from plspl_company_info where (deptno = 10 and job = ‘MANAGER‘) or (deptno = 20 and job = ‘CLERK‘) ;

select * 
from plspl_company_info 
where (deptno = 10 and job = ‘MANAGER‘) or (deptno = 20 and job = ‘CLERK‘) or ((job not in(‘MANAGER‘, ‘CLERK‘)) and sal >= 2000) ;

select distinct job from plspl_company_info where comm is not null ;

select * from plspl_company_info where (comm is  null) or comm < 100 ;

select * from plspl_company_info where ename not like ‘%A%‘;

select * from plspl_company_info where ename like ‘%A%‘ order by sal DESC, hiredate, job;