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SQL: Joining the same table twice (or more)
Problem:
In table A, "A.foo" and "A.bar" both refer to records in table B. How to join both in a single SQL statement?
 
Solution:
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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