• If to you NULL = '' then declare you column NOT NULL !! (maybe even add "with default '' )

    there are some nice article regarding NULL and its impact for mistakes .... to happen ....

    -http://www.sqlservercentral.com/articles/Advanced+Querying/2829/

    - http://www.sqlservercentral.com/articles/T-SQL/understandingthedifferencebetweenisnull/871/

    - http://www.sqlservercentral.com/articles/ANSI_NULLs/69234/

    - http://www.sqlservercentral.com/articles/Advanced+Querying/gotchasqlaggregatefunctionsandnull/1947/

    - http://www.sqlservercentral.com/articles/Advanced/2921/

    Johan

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