Oracle Auto-increment ID implementation

Source: Internet
Author: User

Oracle Auto-increment ID implementation

First, create a table:

 

Create table test (id number (32) not null primary key, name varchar2 (32 ));

 

Create sequence test_sequenceINCREMENT BY 1 -- add several start with 1 each time -- count NOMAXVALUE from 1 -- do not set the maximum value NOCYCLE -- accumulate all the time, do not cycle NOCACHE -- do not CREATE a buffer

 

Create trigger test_trigger before insert on test for each row when (new. id is null) -- starts the trigger to generate the idnumber begin select test_sequence.nextval into: new. id from sys. dual; end;
Insert into test (name) values ('hangsan'); insert into test (id, name) values (101, 'lisi ');

 

 

PS: When a trigger is created, ":" In into: new. id from sys. dual is near new, not into: new. id from sys. dual.

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.