Question

I want to update the table value comparing with two column values.

Query

UPDATE  acc SET slloc =
  (SELECT  Location
    FROM   Duplication$
    WHERE  Duplication$.GROUP1 = acc.grpcd 
         AND acc.ccode = Duplication$.div)

The above query showing error as

Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
The statement has been terminated.

How can i change my query

Answer 1

Just rewrite your UPDATE to use a JOIN and you can update as many rows as you like…

UPDATE a SET slloc = d.Location
FROM acc a
JOIN Duplication$ d ON d.GROUP1 = a.grpcd 
                AND d.div = a.ccode