Oracle 如何实现自增id

1. 创建一个序列
2. 创建一个触发器
3. 绑定触发器

-- sql 语句
create table employee(
id int,
DeptNo number,
EmpNo number,
Ename varchar(16),
Job varchar(32),
Sal float,
HireDate date,
constraint pk_employee primary key(EmpNo)
);

-- 2. 创建序列
create sequence employ_autoinc
minvalue 1
maxvalue 999999999999
start with 1
increment by 1
nocache;

-- 3. 创建一个触发器

/*-- Created on 2021/2/8 by HP 
create or replace trigger insert_employ_autoinc
before insert on employee
for each row

begin
  -- Test statements here
  select employ_autonic.nextval into:new.id from dual;
  
  
end insert_employ_autoinc;*/

 insert into employee(DeptNo,EmpNo,Ename,job,sal,hiredate) 
  values(520,5201002,'James zhou','PD',6000,to_date('2012-10-22','yyyy-mm-dd'));
  select * from employee;

注意 先创建序列 在创建触发器
触发器内容

create or replace trigger insert_employ_autoinc
before insert on employee
for each row

begin
  -- Test statements here
  select employ_autoinc.nextval into:new.id from dual;
  
  
end insert_employ_autoinc;

插入数据

 insert into employee(DeptNo,EmpNo,Ename,job,sal,hiredate) 
  values(520,5201002,'James zhou','PD',6000,to_date('2012-10-22','yyyy-mm-dd'));
  insert into employee(DeptNo,EmpNo,Ename,job,sal,hiredate) 
  values(530,5201003,'kai yang','PD',6000,to_date('2012-10-22','yyyy-mm-dd'));

查询

select * from employee;

删除表

drop table employee;
drop sequence employ_autoinc;

标签：insert,自增,autoinc,EmpNo,employ,employee,Oracle,--,id
来源： https://www.cnblogs.com/yk2763691852/p/14389829.html