MySQL日期格式-日期查询困难

Question

I want to perform a simple query like this in my PHP,

SELECT noslots FROM calender WHERE coursedate = '01-01-2012';

however my dates are stored in the database in the standard YYYY-MM-DD format so obviously I get no reults.

I have tried reading through the manual but for a beginner it is difficult to extract the correct information

thank you for any help you can offer!

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Answer 1

You can use -

SELECT noslots
FROM calender
WHERE coursedate = STR_TO_DATE('01-01-2012', '%d-%m-%Y');

You might need to switch the %d and %m around depending on your date format.

Answer 2

MySQL's ONLY supported date/time format is yyyy-mm-dd hh:mm:ss . You cannot pass any other string and have it properly parsed as a date. It is up to you to properly format your dates into the mysql format, meaning you'll have to pass 2012-01-01 in the query.

Answer 3

我将使用PHP的date()和strtotime()函数：

mysql_query("SELECT `noslots` FROM `calender` WHERE `coursedate` = '" . date('Y-m-d H:i:s', strtotime('01-01-2012')) . "'");