Mysql Explain Explained
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Adrian Hardy's slides from PHPNW08 ...
Adrian Hardy's slides from PHPNW08
Once you have your query returning the correct results, speed becomes an important factor. Speed can either be an issue from the outset, or can creep in as your dataset grows. Understanding the EXPLAIN command is essential to helping you solve and even anticipate slow queries.
Associated video: http://blip.tv/file/1791781
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