oracle經典建表語句–scott建表
複製**
create table emp
(empno number(4) primary key,
ename varchar2(10),
job varchar2(9),
mgr number(4),
hiredate date,
sal number(7,2),
comm number(7,2),
depno number(4)
);create table dept(
deptno number(4),
dname varchar2(14),
loc varchar2(13)
);create table salgrade
(grade number,
losal number,
hisal number
);create table bonus
(ename varchar(10),
job varchar2(9),
sal number,
comm number
);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』);
select * from dept;
insert into emp values
(7369,『smith』,『clerk』,7902,to_date(『17-12-1980』,『dd-mm-yyyy』),800,null,20);
insert into emp values
(7499,『allen』,『salesman』,7698,to_date(『20-2-1981』,『dd-mm-yyyy』),1600,300,30);
insert into emp values
(7521,『ward』,『salesman』,7698,to_date(『22-2-1981』,『dd-mm-yyyy』),1250,500,30);
insert into emp values
(7566,『jones』,『manager』,7839,to_date(『2-4-1981』,『dd-mm-yyyy』),2975,null,20);
insert into emp values
(7654,『martin』,『salesman』,7698,to_date(『28-9-1981』,『dd-mm-yyyy』),1250,1400,30);
insert into emp values
(7698,『blake』,『manager』,7839,to_date(『1-5-1981』,『dd-mm-yyyy』),2850,null,30);
insert into emp values
(7782,『clark』,『manager』,7839,to_date(『9-6-1981』,『dd-mm-yyyy』),2450,null,10);
insert into emp values
(7839,『king』,『president』,null,to_date(『17-11-1981』,『dd-mm-yyyy』),5000,null,10);
insert into emp values
(7844,『turner』,『salesman』,7698,to_date(『8-9-1981』,『dd-mm-yyyy』),1500,0,30);
insert into emp values
(7900,『james』,『clerk』,7698,to_date(『3-12-1981』,『dd-mm-yyyy』),950,null,30);
insert into emp values
(7902,『ford』,『analyst』,7566,to_date(『3-12-1981』,『dd-mm-yyyy』),3000,null,20);
insert into emp values
(7934,『miller』,『clerk』,7782,to_date(『23-1-1982』,『dd-mm-yyyy』),1300,null,10);
select * from emp;
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);
select * from salgrade;
commit;
–外來鍵約束
create table qq(
garde number(3) primary key,
gname varchar2(20)
);create table firend(
fid number(3),
name varchar2(20),
grade number(3),
foreign key(grade) references qq(garde) on delete cascade
);創表時建立外來鍵:
foreign key(列名) references 引用外來鍵表名(列名) on delete cascade
創表後新增外來鍵:
alter table 表名 add constraint 外來鍵約束名 foreign key(列名) references 引用外來鍵表(列名)
on update restrict //同步更新
on delete restrict // 同步刪除;
…oracle實現主鍵id自增
– 建立表
create table t_module (
module_id int not null ,
module_code varchar(32) not null,
module_name varchar(32) not null,
isnew int default 0 ,
primary key (module_id)
)– 為 表 建立 序列
– 從1 開始, 每次 加1
create sequence seq_module start with 1 increment by 1;
–查詢 下乙個 id
select seq_module.nextval from dual
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