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if you donamp;#39;t spend a lot of time reading the MySQL documentation you probably you you you probably have a lot more friends than I do but youamp;#39;re missing out on a lot more tips than I am so if we take a look at my personal copy of chapter 8 of the MySQL documentation that is actually not available to purchase I got this printed and bound myself so if we take a look at uh this little note right here as an alternative to a composite index you can introduce a column that is hashed based on information from other columns if the column is short unique an index it might be faster than a wide index on many columns interesting MySQL is telling us that if youamp;#39;re putting a composite index over a bunch of columns you might be better off if you hash all of those things together and put an index on that letamp;#39;s take a look for this example weamp;#39;re weamp;#39;re going to be looking at the addresses table and weamp;#39;ve got about 500,000 rows in here across six go
