創建表
create table person (pid int,name varchar2(20) unique,
age int check(age between 0 and 150),sex varchar(4) default '男',tp int,
address varchar(200),constraint person_pid_pk primary key(pid));
插入數據
insert into person values(0011,'劉三姐',25,'男',13930123021,'河北省曲陽縣');
創建子表
create table book(bid int primary key not null,bname varchar2(20),bprice number(5,2),pid int,
constraint person_book_pid_fk foreign key(pid) references person(pid));
插入數據
insert into book values(0101,'簡愛',7.85,0011);
增加部門50
select * from dept;
insert into dept values(50,'HR','HOUSTON');
在emp中插入新數據
insert into emp(empno,ename,job,sal,mgr,hiredate,comm,deptno)
values(8888,'張三','經理',9000,null,sysdate,null,50);
ROWNUM
查詢前五個數據
select rownum,empno,ename,job,sal,hiredate
from emp where rownum<=5;

select * from

查詢后五個數據
(select rownum rn,empno,ename,job,sal,hiredate from emp
where rownum <=10 ) temp
where temp.rn>5;

總結

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