A missing quote made MySQL scan 7.2 million rows. Here's how EXPLAIN exposed the problem and what it taught us about safe ...
Missing indexes are one reason why an SQL query takes longer (much longer) to complete. Here's how to find out about them and fix the problem. In my previous article, Identifying your slowest SQL ...
The indexes on a the tables of a large database make a huge difference in its performance and utility. Without an index, locating a single record in a large table can take several seconds; with the ...
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