用時間戳查詢MySQL數據庫

Question

我有一個時間戳字段[SubmissionDate]，默認爲current_timestamp，我想知道如何以這樣的方式查詢我的數據庫，例如我只顯示在某一年提交的所有條目和月？ 喜歡的東西：

SELECT * FROM DNA_entrys 
WHERE `SubmissionDate`.month = February 
AND `SubmissionDate`.year = 2004 

應該是一個基本操作，但我找不到對

Answer 1

SELECT * FROM DNA_entrys 
WHERE month(`SubmissionDate`) = 2 
AND year(`SubmissionDate`) = 2004 

壽，我建議：

SELECT * FROM DNA_entrys 
WHERE `SubmissionDate` between '2004-02-01' and ('2004-03-01' - INTERVAL 1 SECOND) 

後者允許使用索引，這使得查詢速度更快，如果你有ithat索引字段。

Answer 2

快速解答工作的呢？

SELECT * FROM DNA_entrys 
WHERE MONTH(SubmissionDate) = 2 
AND YEAR(SubmissionDate) = 2004