将表t_uaer的字段ID设置为自增:(用序列sequence的方法来实现)----创建表
Create table t_user(
Id number(6),userid varchar2(20),loginpassword varchar2(20),isdisable number(6)
);----创建序列
create sequence user_seq
increment by 1
start with 1
nomaxvalue
nominvalue
nocache----创建触发器
create or replace trigger tr_user
before insert on t_user
for each row
begin
select user_seq.nextval into :new.id from dual;
end;----测试
insert into t_user(userid,loginpassword, isdisable)
values("ffll","liudddyujj", 0);
insert into t_user(userid,loginpassword, isdisable)
values("dddd","zhang", 0)
select * from t_user;
就可以看出结果。
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