At 13:16 -0400 9/23/02, Jesse Sheidlower wrote: >On Mon, Sep 23, 2002 at 11:20:49AM -0500, Paul DuBois wrote: > >I had a question about the use of the UNION command in this >context. > >The original poster asked about getting the name of the >_table_ as well as some other data, which would seem to be >relatively necessary for doing many types of things with the >results of the query. For example, if you issue a query that >gives you the union of seven different tables, and then you >want to do another query based on these results, you'll need >to know which of the seven tables a particular result came >from. The docs on UNION don't seem to address this, none of >the responses mentioned it, and I can't seem to find any >discussion of how to retrieve the table name in a SELECT query >(I acknowledge that most of the time you wouldn't need it, but >in a UNION you might). > >How do you get the table name returned as part of the query >results? Or am I misunderstanding how one would work with the >results? > >Jesse Sheidlower
You can't get the name of the table *from the query*. However, I assume that you already know the name of the table, or you wouldn't be able to write the query in the first place. :-) So just select an extra column: CREATE TABLE tmp SELECT 't1' AS tbl_name, t1.* FROM t1 ... ; INSERT INTO tmp SELECT 't2', t2.* FROM t2 ... ; INSERT INTO tmp SELECT 't3', t3.* FROM t3 ... ; When you're done, the first column will indicate the name of the table from which each row was obtained. --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
