• UPDATE t SET t.sno = s.sno

    FROM t INNER JOIN s ON s.sid=t.sid

    WHERE t.sno IS NULL

    Gail Shaw
    Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
    SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

    We walk in the dark places no others will enter
    We stand on the bridge and no one may pass