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07.22.2007 at 06:49PM PDT, ID: 22713187
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7.6

speeding up a %like% search

Asked by pdanese in MySQL Server, Databases Miscellaneous, Search Engines

Hi, I'm using MySQL 5 as a back-end for a web-based query, but this may be a more generalizable database-search question.

Many of the db queries that I want to perform involve searching tables w/ a few million rows via a 'like' query.

e.g. select * from cars where license_plate like '%XB%' /* looking for all license plates that contain the letters XB next to each other.

What (if anything) can be done to speed up this query.
I understand that an index on the license_plate column won't help because of the leading wildcard, but is there *anything* that can speed up such a query?

e.g. processor speed, platter-speed on the hard disk?, extra RAM...anything?

thanks!Start Free Trial
 
 
[+][-]07.22.2007 at 07:16PM PDT, ID: 19544613

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Zones: MySQL Server, Databases Miscellaneous, Search Engines
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Solution Provided By: weellio
Participating Experts: 3
Solution Grade: A
 
 
[+][-]07.22.2007 at 10:32PM PDT, ID: 19545234

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[+][-]07.23.2007 at 02:48AM PDT, ID: 19545954

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[+][-]07.23.2007 at 03:06AM PDT, ID: 19546019

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[+][-]07.23.2007 at 03:57AM PDT, ID: 19546240

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