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    Contributing User
    Devshed Regular (2000 - 2499 posts)

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    i don't like it
    Then I won't do it

    you start with that table, and the WHERE clause applies the filter, thus only one row is returned, and from that point on, only matching rows are joined
    I do not know the internal workings of MySQL or any other SQL engine, but maybe I should try to educate myself. Are you saying that the source code first figures out which table to deal with first (I understand that just cause I put table1 first in the query doesn't guarantee it will be run first, but go with me..), then filters the table based on the WHERE, then JOINs the next table, and filters again based on the WHERE, etc, etc?
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  3. SQL Consultant
    Devshed Supreme Being (6500+ posts)

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    Originally Posted by NotionCommotion
    Are you saying that ...

    i'm saying that if you have FROM x JOIN y JOIN z WHERE then it would make more sense if written FROM z JOIN y JOIN x WHERE

    since that's the way it's going to be executed, why not write it that way | @rudydotca
    Buy my SitePoint book: Simply SQL
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