如何將日期轉換爲年，月，日日期格式

Question

我嘗試從日數中獲取年，月，日的數量。我嘗試這樣做：

SELECT enddate,startdate,extract(month from enddate)-extract(month from startdate) 
    FROM workexpdeails ; 

Answer 1

SELECT 
    enddate 
    ,startdate 
    ,(YEAR(enddate)*12+MONTH(enddate)) - (YEAR(startdate)*12+MONTH(startdate)) 
    as diffmonths 
    ,DATEDIFF(enddate, startdate) as diffdays 
FROM workexpdeails ; 

參見：http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html