How to Find Redundant Indexes in SQL

The following two indexes are redundant in most SQL databases: It is usually safe to drop the first index, because all queries that query the LAST_NAME column only can still profit from the second index I_ACTOR_2. The reason being that LAST_NAME is the first column of the composite index I_ACTOR_2 (it would be a different […]

via How to Find Redundant Indexes in SQL — Java, SQL and jOOQ.

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