If you create multiple unique keys in a table, would that slow down read/write times?
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If you create multiple unique keys in a table, would that slow down read/write times?
It won’t hurt read times much (unless you have a very low amount of RAM available) since they simply sit on the HDD/RAM but it will definitely hurt write times. For each insert/update/delete you do, the index has to be updated. If you have many indexes, many indexes will have to be updated.