• I agree with Gus... if there are any duplicates in Mytable02 according to the WHERE clause, the SELECT will find them and return them. Updates, however, will only update a row in MyTable01 only once no matter how many "identical" rows exist in MyTable02. Some loath that fact... I frequently count on it. Oracle won't even let you do it.

    --Jeff Moden


    RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
    First step towards the paradigm shift of writing Set Based code:
    ________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

    Change is inevitable... Change for the better is not.


    Helpful Links:
    How to post code problems
    How to Post Performance Problems
    Create a Tally Function (fnTally)