Create a primary key auto-increment table in Oracle

Source: Internet
Author: User

1. Create a table

 
Create TableTest_increase (useridNumber(10)Not Null Primary Key,/*Primary Key, automatically added*/UsernameVarchar2(20));

2,Create auto-increment Sequence

 CreateSequence testincrease_sequence IncrementBy 1--Add a fewStartWith 1--Count from 1Nomaxvalue--If the maximum value is not set, set the maximum value to maxvalue 9999.Nocycle--Always accumulate, not loopCache10;

3,Create a trigger

Create TriggerTest_increase beforeInsert OnTest_increaseForEach row/*Checks whether each row is triggered.*/BeginSelectTestincrease_sequence.nextvalInto: New. useridFromDual;End;//*Exit sqlplus row Edit*/

4. Submit

Commit ; 5. Test
 
Insert IntoTest_increase (username)Values('Test');

From: http://www.cnblogs.com/lizhishugen/archive/2012/11/29/2794692.html

 

 

 

 

 

 

 

 

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.