On Fri, Jan 7, 2011 at 9:46 AM, Toby Hart Dyke t...@hartdyke.com wrote:
On 1/7/2011 12:10 AM, Fahim M wrote:
Hi
I have a certain number of mysql tables(relation), say 50, some of them
having 5 fields and some with 6 fields. a particular search item may be
found in multiple tables with multiple rows. I am using a loop to find all
those.
My problem is I want to first combine all those results and then find all
the unique entries. (the query results may overlap).
What is the best way to do it?
If you're looking for unique results, do a UNION query for all the tables.
You'll need to add a dummy field for the 5-field tables, and make sure the
field names are the same (use oldfieldname AS newfieldname to make sure
everything ends up the correct result column). UNION queries automatically
remove duplicates.
Toby
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Though from the sounds of it, there is a problem with the table design
if you have multiple results in multiple tables
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Bastien
Cat, the other other white meat
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