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  1. #1
    Junior Member
    Join Date
    Jun 2018
    Posts
    10
    Member #
    59288

    How do I calculate how many each number originally in the first table met once?

    There are two tables, for example telephones, the second is names. Join each other via Left join. Accordingly, the records are duplicated. how to calculate how many each number was originally in the first table met once?
    XoXo 22coders

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