SQL compare question.. non-distincts

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  1. #1

    Default SQL compare question.. non-distincts

    Hi, Im wondering is CF has an easy way of doing this, or if there is a way
    using SQL:

    I'm finding duplicated rows in the DB (SQL*SVR) and need to schedule a script
    that runs and compares the contents of the first 7 or 8 columes per row to
    determine if there is a duplicate item. The determining factors that identify
    a unique item are these columns. Something like "Search through the db and
    look for these NON-DISTINCT values for the columns in question"? (where all 7
    column values are the same)

    Many thanks

    Damnit Spock! Guest

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  3. #2

    Default Re: SQL compare question.. non-distincts

    What do you want to know about them?

    SELECT column1, ... column8, count(*)
    FROM table
    GROUP BY column1, ... column8
    HAVING count(*) > 1

    will show you the count of rows for each of the 8 values that appear more than
    once.

    A unique key on those 7 or 8 columns will prevent duplicates from being
    entered, but any duplicates will have to be removed before you can apply the
    constraint.

    JR

    jonwrob Guest

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