Question

I have all dates stored as timestamps (int) in the database.

how can I get dates that are exactly 3 days earlier?

I tried

SELECT date from user WHERE  DATE_ADD(DATE( FROM_UNIXTIME( `created` ) ), INTERVAL 3 DAY) = CURDATE()

is that the best/most efficient way to do it?

Answer 1

SELECT date
FROM user
WHERE created = UNIX_TIMESTAMP(CURRENT_DATE - INTERVAL 3 DAY)

Note: no function used on the created column in where clause. This query should be able to use index.