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does it slow down the query time to use a lot of unique indexes? i dont have that many im just curious, i think i have heard this some where
It depends on the database server software and table/index type you are using.
Inserts will be slower any time you have indexes of any sort, but not necessarily by a lot – this will depend on the table size as well.
In general, unique indexes should speed up any SELECT queries you use that are able to take advantage of the index(es)