You want to use a LEFT JOIN, which will select all the records from A and link them with records in B if there are any. If there are
no matches in B, the the fields from B will be NULL. You then just check for the NULL value (no match) in a B field and use that as
your filter.
SELECT A.*,B.D FROM A LEFT JOIN B ON A.C=B.D WHERE B.D IS NULL
----- Original Message -----
From: "Aaron Cannon" <[EMAIL PROTECTED]>
To: <mysql@lists.mysql.com>
Sent: Wednesday, January 03, 2007 3:47 PM
Subject: select statement question
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Hi all. I hope this is the right place to ask this.
I have two tables, A and B. Each of these tables has a column with
integers. The column in table A is C and the one in B is D.
I need a select statement that will return all records whose C value is not
in any row in D.
for example:
C =
1
2
3
4
5
6
7
8
11
D =
2
4
6
8
10
and the statement would return:
1
3
5
7
11
Probably an easy question for those of you more experienced but I have no
clew.
Thanks in advance.
Sincerely
Aaron Cannon
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Skype: cannona
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address.)
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