Hi - I have a question regarding an innodb table we have that currently has 6 indexes which, for ease-of-use and brevity, I’ll display as:
All indexes are non-unique.
Given this series of indexes, wouldn’t I1, I5, and I6 be unnecessary?
Would it be better to replace the indexes with a single index (A-H)?
Is a non-unique index of N columns better/faster than N indexes?
This table has slightly more than 3 million records and records are periodically updated.