如何将日期转换为年，月，日日期格式

Question

我尝试从日数中获取年，月，日的数量。我尝试这样做：

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 ; 

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