MySQL - Using an alias in a subquery with WHERE clause

Posted by gaoshan88 on Stack Overflow See other posts from Stack Overflow or by gaoshan88
Published on 2010-04-19T20:19:03Z Indexed on 2010/04/19 20:23 UTC
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mysql

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mysql-query

I have a feeling I am completely borking this MySQL query but I'll ask anyway. I am wondering why I get the warning Unknown column 'FOO', and how I can get this query to work properly, in 'where clause' when I run the following:

SELECT
sample_id as FOO
FROM
tbl_test
WHERE
sample_id = 521 AND sample_id IN (
Select
sample_id
FROM
tbl_test
WHERE
sample_id = FOO
GROUP BY sample_id
)

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