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Skrevet av Emne: SQL: Joining the same table twice (or more)  (Lest 2495 ganger)

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SQL: Joining the same table twice (or more)
« på: 27. ſeptember 2008, 18:24 pm »
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    • In table A, "A.foo" and "A.bar" both refer to records in table B. How to join both in a single SQL statement?
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    ATC

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    [Solved] SQL: Joining the same table twice (or more)
    « Svar #1 på: 27. ſeptember 2008, 18:24 pm »
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    • Use JOIN..AS like this:

    SELECT A.*, fooB.*, barB.*
    FROM A
    LEFT JOIN B AS fooB ON (A.foo = fooB.id)
    LEFT JOIN B AS barB ON (A.bar = barB.id)
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