On Tue, July 31, 2007 8:52, David Ruggles said:
I need to find a userid across several different tables.
What is the best way to do this?
For example I have three tables
TableA
TableB
TableC
They all have a field id
I want to find the value 123 in the field id in any one of these
I want to find the value 123 in the field id in any one of these
tables.
SELECT id FROM TableA WHERE id = 123
UNION
SELECT id FROM TableB WHERE id = 123
UNION
SELECT id FROM TableC WHERE id = 123
Please note that UNION requires that the same number (and type?) of
fields be selected from each
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Sent: Tuesday, July 31, 2007 11:56 AM
To: mysql@lists.mysql.com
Subject: Re: Finding a value in multiple tables
On Tue, July 31, 2007 8:52, David Ruggles said:
I need to find a userid across several different tables.
What is the best way to do this?
For example I have
