Need help with the Merge statement

Question

I want to update a table called Sorels_ext from a table called Sorels. The link between them is the fkey_id of Sorels_ext equals the identity_column of the Sorels table. Thi

Answer 1

I believe you have to alias your your source data like so:

USING (select SOR.identity_column, 
   CASE  WHEN left(SOR.FPARTNO, 2) = 'BL' 
   THEN 'Blue'        
   WHEN left(SOR.FPARTNO, 2) = 'RD' 
   THEN 'Red'        
   ELSE 'White'      
   END from Sorels AS SOR) **AS SOR** ON  (SORe.fkey_id = SOR.identity_column)