Portal | Manuals | References | Downloads | Info | Programs | JCLs | Mainframe wiki | Quick Ref
IBM Mainframe Computers Forums Index
 
Register
 
IBM Mainframe Computers Forums Index Mainframe: Search IBM Mainframe Forum: FAQ Memberlist Profile Log in to check your private messages Log in
 
Update table when inner select returns 1 row

 
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> DB2
View previous topic :: :: View next topic  
Author Message
morpheus007

New User


Joined: 27 Dec 2005
Posts: 58

PostPosted: Thu Nov 22, 2007 6:06 am    Post subject: Update table when inner select returns 1 row
Reply with quote

We have a requirement to Update a table only when an inner Select statement returns 1 row as result.If the select returns anything other than 1 row then the outer update must not run.

Kindly let me know how to code the query.The query has to be outside the programming environment as it will be run from jcl.
Back to top
View user's profile Send private message

stodolas

Active Member


Joined: 13 Jun 2007
Posts: 632
Location: Wisconsin

PostPosted: Thu Nov 22, 2007 6:36 pm    Post subject:
Reply with quote

Based on my experience, this is not possible. You need to check how many rows are returned from the SELECT before running the update. It needs to be done in 2 steps with a check between the 2 of them or the inner SELECT needs to have a scalar function or a FETCH FIRST 1 ROWS ONLY in it to force the get of only one row.
Back to top
View user's profile Send private message
View previous topic :: :: View next topic  
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> DB2 All times are GMT + 6 Hours
Page 1 of 1

 

Search our Forum:

Similar Topics
Topic Author Forum Replies Posted
No new posts How to force a select query to abend neo4u DB2 5 Mon Apr 23, 2018 1:36 pm
No new posts Searching a table for the field name? socker_dad COBOL Programming 8 Sat Mar 31, 2018 2:57 am
No new posts Need inputs on DB2 tablespace/table r... ashek15 DB2 3 Sat Mar 24, 2018 11:49 pm
No new posts SELECT TO MULIPLE OUTFIL speermb DFSORT/ICETOOL 5 Fri Mar 23, 2018 10:44 pm
No new posts COBOL declaration for table Poha Eater DB2 3 Mon Feb 26, 2018 6:58 pm

Facebook
Back to Top
 
Job Vacancies | Forum Rules | Bookmarks | Subscriptions | FAQ | Polls | Contact Us