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Tip of the Day
Language: Enterprise
Expertise: Beginner
Mar 20, 2001

DB2 UDB V7 (Inserting into Identity Columns)

This tip provided by Experts Exchange

DB2 UDB V7 (Inserting into Identity Columns)

 

This tip provided by Experts Exchange.

 

Question:

I am working with DB2 UDB v7 and need to insert into a table with an identity column.

Example:

SourceTable:
Student    CourseGrade
-------    -----------
Fred       A
Wilma      B

TargetTable Desired result:  
(SurrogateKey is defined as
Int Generated Always As Identity
(Start with 1, Increment by 1, No Cache)
SurrogateKey     Student    CourseGrade
------------     -------    -----------
1                Fred       A
2                Wilma      B

I want to write a statement like:
Insert into TargetTable
Select
  Student,
  CourseGrade
From SourceTable

This produces an error "The number of values assigned is not the same as the number of specified or
implied columns"

Is there a way to specify that the first column is inserted into an identity column?

 

 

Accepted Answer:

To create records using the identity column you should specify only the fields that need populating.

insert into targettable (student,coursegrade) select student,coursegrade from sourcetable;

or

insert into targettable (student,coursegrade) select * from sourcetable;

If updating with values use

insert into targettable (student,coursegrade) values ('Fred','A');

 

Written on 2/06/2001

 

 

DevX Staff
 
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