Re: SELECT from multiple tables (not join though)

SELECT 'table1' AS source, file_name FROM file_info_1 WHERE
file_parent_dir='/'
UNION
SELECT 'table2' AS source, file_name FROM file_info_2 WHERE
file_parent_dir='/'
UNION
SELECT 'table3' AS source, file_name FROM file_info_3 WHERE
file_parent_dir='/' ORDER BY file_name;

On January 10, 2005 01:24 pm, Madison Kelly wrote:
> Bruno Wolff III wrote:
> > On Mon, Jan 10, 2005 at 12:47:53 -0500,
> >
> >   Madison Kelly <linux@alteeve.com> wrote:
> >>The trick now is I need to know which table each result came from. I can
> >>add another column and record the table number and SELECT that at the
> >>same time but before I do I was wondering if I can do this more
> >>efficiently or elegantly.
> >
> > You can add a constant to the select list in each of the subselects
> > that indicates which table is being used.
>
> ^.^; Can you point me to docs that will help me learn how to do that?
> Thanks! Or rather, do you mean add a column to the table with an ID for
> the table that I select beside the file_name? If so, that is what I am
> planning to do if I can't find a smoother way to do it.
>
> Thanks!!
>
> Madison
>
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