RE: Sql - updating multiple records with a sequential value

["Smith, Mike" <Mike_Smith@xxxxxxxxxxxxxxxx>]

Subqueries are where I really struggle.  I have taken your query and
converted to proper field names as such. 
UPDATE contmast00 a SET a.cmsuffix =                                
  CASE CMMASTF WHEN 'Y' THEN '00'                                   
  ELSE                                                              
    (SELECT b.cmsuffix                                              
     FROM (SELECT cmmastr, cmcontract,                              
                  RIGHT(DIGITS(ROW_NUMBER()                         
                               OVER(PARTITION BY cmmastr            
                                    ORDER BY cmcontract)),2)        
                  AS suffix                                         
           FROM contmast00 b                                        
           WHERE cmmastf = 'N') b                                   
     WHERE a.cmmastr = b.cmmastr AND a.cmcontract = b.cmcontract)   
  END                                                               

When I run this it tells me Column CMSUFFIX not in table B in *N. this
points to the (SELECT b.cmsuffix 

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Elvis Budimlic
Sent: Wednesday, April 23, 2008 2:56 PM
To: 'Midrange Systems Technical Discussion'
Subject: RE: Sql - updating multiple records with a sequential value


I goofed on qtemp/t1, it should have said myFile (or whatever your real
file name is). PARTITION is an SQL keyword.  In the context of
ROW_NUMBER function (available with V5R4) you can think of it as a GROUP
BY equivalent.

Elvis

Celebrating 11-Years of SQL Performance Excellence on IBM i5/OS and
OS/400 www.centerfieldtechnology.com
 

-----Original Message-----
Subject: RE: Sql - updating multiple records with a sequential value

Thanks Elvis, 
2 questions.  
Does qtemp/t1 have to exist?  I get a T1 in qtemp not found.  

Also, what is PARTITION?   Is this a keyword?  I couldn't find it in my
sql book.  If not what is PARTITION