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Asked: 2026-06-13T02:17:16+00:00

I had a query like this select count(distinct sessionKey) as tot from visits But

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I had a query like this

select count(distinct sessionKey) as tot from visits

But it takes too much time for execution 48512 ms Now.

Within some months data in table will become double of the current amount of data.How I can optimize this query

This is my table structure

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1 Answer

  1. Editorial Team

    add an INDEX in your column SessionKey and it will improve its performance.

    ALTER TABLE visits ADD INDEX (SessionKey)
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