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I have a Mysql Table that is used for a log file on the that table there is a field called 'log_date' And it stores the date in the following format( %Y-%m-%d %H:%i.%s ).On the DB the dates look like something this 2013-20-05 00:00.00. Lets say today's date is 2013-20-05 And I have log files from 2013-01-01 to present day. If I run a query like this:

SELECT * FROM log_table
WHERE STR_TO_DATE(log_date, '%Y-%m-%d %H:%i.%s') < '2013-05-05 00:00.00'

This is returning every row in the DB including rows that are greater than 2013-05-05 00:00.00

And if I reverse the < (less then) to a > (greater then) with a query that looks like this: 

SELECT * FROM log_table
WHERE STR_TO_DATE(log_date, '%Y-%m-%d %H:%i.%s') > '2013-05-05 00:00.00'

Then it returns ZERO rows. I think the time stamp is what is causing the problem I have worked with the date format before but not the DateTime format. Why is this happening?

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2 に答える 2

41

log_date は DateTime データ型である必要があります。MySQL DATE 関数を使用する方がはるかに簡単です。いくつかの例

SELECT * FROM log_table
WHERE DATE(log_date) < '2013-05-05'

SELECT * FROM log_table
WHERE DATE(log_date) > '2013-05-05'

SELECT * FROM log_table
WHERE DATE(log_date) BETWEEN '2013-04-05' AND '2013-05-05'

SELECT * FROM log_table
WHERE DATE(log_date) BETWEEN DATE(CURRENT_DATE() - INTERVAL 2 WEEK) AND 
DATE(CURRENT_DATE() + INTERVAL 4 DAY)
于 2013-05-20T21:03:51.740 に答える
1

あなたはそれで試すことができます..

WHERE DATE_FORMAT(AUCTION_DATE, '%Y%m%d') >= DATE_FORMAT('2013/5/18', '%Y%m%d')

now()関数を使用して今日の日付を取得することもできます。

于 2013-05-21T05:11:17.130 に答える