为什么这个MySQL查询返回0结果

Question

我想在过去5分钟内获得所有记录，但它什么都没有返回..

SELECT * FROM (`user_actions`) WHERE `IP` = '127.0.0.1' AND `type` = 'Failed Login' AND date =DATE_SUB(NOW(), INTERVAL 5 MINUTE) 

Answer 1

It's returning nothing because there no results for what you're asking for.... a date of exactly 5 minutes ago.

You should not use the = operator for your DATE , you should be using inequalities.

That is, you want the date greater than 5-minutes-ago

Answer 2

It should be date > not date = , which would only match rows exactly equal to the time 5 minutes ago.

As an example, if it is currently 12:30PM, to find the rows that are within the last 5 minutes, you want all those with a time greater than 12:25PM. Querying only for rows with a time equal to 12:25PM won't give you those recorded at 12:26PM, 12:27PM, etc.

SELECT * FROM user_actions WHERE IP = '127.0.0.1' AND type = 'Failed Login' AND date > DATE_SUB(NOW(), INTERVAL 5 MINUTE)