《Mysql學(xué)習(xí)探討如何計(jì)算age的sql函數(shù)》要點(diǎn)：
本文介紹了Mysql學(xué)習(xí)探討如何計(jì)算age的sql函數(shù)，希望對(duì)您有用。如果有疑問，可以聯(lián)系我們。
代碼如下:
ALTER FUNCTION [dbo].[get_FullAge]
(
?@birthday datetime, @currentDay datetime
)
RETURNS INT
AS
BEGIN
DECLARE @age INT
SET @age = DATEDIFF(YEAR, @birthday, @currentDay)
IF DATEDIFF(DAY, DATEADD(YEAR, @age, @birthday), @currentDay) <= 0
?SET @age = @age - 1
IF DATEPART(MONTH, @birthday) = 2 AND DATEPART(DAY, @birthday) = 29 AND DATEPART(MONTH, @currentDay) = 3
?AND DATEPART(DAY, @currentDay) = 1 AND
?NOT (YEAR(@currentDay) % 4 = 0 AND (YEAR(@currentDay) % 100 !=0 OR YEAR(@currentDay) % 400 = 0))
?SET @age = @age - 1
IF @age < 0
?SET @age = 0
? RETURN @age
END
--Sql根據(jù)出生日期計(jì)算age(不是很準(zhǔn)確)
1.? select datediff(year,EMP_BIRTHDAY,getdate()) as '年齡' from? EMPLOYEEUnChangeInfo
2.? floor((DateDiff(day,u.EMP_BIRTHDAY,getdate()))/365
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