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    <p>The problem with the '%keyword%' type search is that there is no way to efficiently search on it in a regular table, even if you create an index on that column. Think about how you would look that string up in the phone book. There is actually no way to optimize it - you have to scan the entire phone book - and that is what MySQL does, a full table scan.</p> <p>If you change that search to 'keyword%' and use an index, you can get very fast searching. It sounds like this is not what you want, though.</p> <p>So with that in mind, I have used fulltext indexing/searching quite a bit, and here are a few pros and cons:</p> <p><strong>Pros</strong></p> <ul> <li>Very fast</li> <li>Returns results sorted by relevance (by default, although you can use any sorting)</li> <li>Stop words can be used.</li> </ul> <p><strong>Cons</strong></p> <ul> <li>Only works with MyISAM tables</li> <li>Words that are too short are ignored (default minimum is 4 letters)</li> <li>Requires different SQL in where clause, so you will need to modify existing queries.</li> <li>Does not match partial strings (for example, 'word' does not match 'keyword', only 'word')</li> </ul> <p><a href="http://dev.mysql.com/doc/refman/5.0/en/fulltext-natural-language.html" rel="noreferrer">Here is some good documentation on full-text searching</a>.</p> <p>Another option is to use a searching system such as <a href="http://www.sphinxsearch.com/" rel="noreferrer">Sphinx</a>. It can be extremely fast and flexible. It is optimized for searching and integrates well with MySQL.</p>
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    1. POIs Full Text search the answer?
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    1. COThanks, I thorght about useing something like Sphinx, but to be honest, unless it's going to take a huge amount of time, I'd rather build it myself that way I understand how it works.
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    2. COwe're getting close to implementing sphinx in one of our applications. we do heavy searching on a ton of data. we used fulltext searching for a while, but needed to move to innodb for transactions. But, fulltext was easy to implement and really fast.
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