计算aage的sql函数

ALTER FUNCTION [dbo].[get_FullAge]( @birthday datetime, @currentDay datetime)RETURNS INTASBEGINDECLARE @age INTSET @age = DATEDIFF(YEAR, @birthday, @currentDay)IF DATEDIFF(DAY, DATEADD(YEAR, @age, @birthday), @currentDay) <= 0SET @age = @age - 1IF DATEPART(MONTH, @birthday) = 2 AND DATEPART(DAY, @birthday) = 29 AND DATEPART(MONTH, @currentDay) = 3AND DATEPART(DAY, @currentDay) = 1 AND NOT (YEAR(@currentDay) % 4 = 0 AND (YEAR(@currentDay) % 100 !=0 OR YEAR(@currentDay) % 400 = 0))SET @age = @age - 1IF @age < 0SET @age = 0  RETURN @ageEND

--Sql根据出生日期计算age（不是很准确）

1.  select datediff(year,EMP_BIRTHDAY,getdate()) as '年龄' from  EMPLOYEEUnChangeInfo

2.  floor((DateDiff(day,u.EMP_BIRTHDAY,getdate()))/365