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6.0

DB2 Generated by Default

Asked by rrjegan17 in DB2 Database

Tags: DB2, Identity

Hi,
   I am aware that using GENERATED BY DEFAULT option for Identity Columns, DB2 provides me the ability to insert ID(mentioned in the sample code below) of my choice and If I don't provide ID then ID would be created by Server. But when I specify a value myself, Server doesn't caches that value and throws violation since I have those values inserted myself earlier and a Primary Key constraint defined. If I dont have Primary Key defined then it inserts duplicate values.

I need a solution such that I need to insert my own values as well as from Server if I dont specify value.
Is there any other way to overcome this situation ?

Kindly execute the sample code below in order to reproduce my problem.
Thanks in advance for your time and support.
1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
create table test ( 
   id integer primary key generated by default AS IDENTITY (START WITH 1, INCREMENT BY 1, NO CACHE),
   col varchar(10)
);
 
insert into test (id, col) values ( 1, 'ab');
insert into test (id, col) values ( 2, 'cd');
insert into test (id, col) values ( 3, 'ef');
insert into test (col) values ( 'bc');
insert into test (col) values ( 'de');
insert into test (col) values ( 'fg');
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About this solution

Zone: DB2 Database
Tags: DB2, Identity
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Solution Provided By: rrjegan17
Participating Experts: 2
Solution Grade: A
 
 
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