To get yesterday's date, you need to subtract one day from today's date. Use CURDATE() to get today's date. In MySQL, you can subtract any date interval using the DATE_SUB() function. Here, since you need to subtract one day, you use DATE_SUB(CURDATE(), INTERVAL 1 DAY) to get yesterday's date.
Following the answer from Philip Rego, you can use SELECT GETDATE() - 1 to subtract days from a date.
SELECT DATE(NOW()-INTERVAL 15 DAY)
For a list of units see http://dev.mysql.com/doc/refman/5.1/en/date-and-time-functions.html#function_date-add
Not entirely related to this question but is related to the title:
SELECT SUBTIME("10:24:21", "5"); -- subtracts 5 seconds. (returns "10:24:16")
SELECT SUBTIME("10:24:21", "01:00:00"); -- subtracts one hour. (returns "09:24:21")
Documentation: MySQL SUBTIME
function
Use:
SELECT NOW() - INTERVAL 15 DAY
to keep the datetime precision.
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