oracle建表設定主鍵自增

首先建立一張表

create

table
member(
memberid 
number
primary
key,
membermail 
varchar2(20)not
null
,membername 
varchar2(20) not
null
,memberpassword 
varchar2(20
));

create

sequence emp_sequence
increment by1
--每次加幾個
start with1--
從1開始計數
nomaxvalue --
不設定最大值
nocycle --
一直累加，不迴圈
nocache --
不建緩衝區

create

trigger
mem_trig before
insert
on member for each row when (new.memberid is
null
)begin
select emp_sequence.nextval into:new.memberid from
dual; 
end;

insert

into member(membermail,membername,memberpassword) values('
[email protected]
','jack
','123456
');

select

*from member;

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首先建立一張表 create table member memberid number primary key,membermail varchar2 20 not null,membername varchar2 20 not null,memberpassword varchar2 20 然後，...

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oracle建表設定主鍵自增 首先建立一張表 create table member memberid number primary key,membermail varchar2 20 not null,membername varchar2 20 not null,memberpassword ...