在T-SQL（SQL Server 2000）中计算某人的年，月和日的年龄的最佳方法是什么？
datediff函数不能很好地处理年份界限，另外，将月份和日期分开将是一个负担。我知道我可以相对轻松地在客户端进行操作，但是我想在stored procedure中完成操作。
以下是一些T-SQL，可为您提供自@date指定的日期以来的年，月和天数。它考虑到DATEDIFF（）计算差异而没有考虑是哪个月或一天的事实（因此8/31和9/1之间的月份差异为1个月），并使用case语句处理该差异，从而减少结果，其中适当。
DECLARE @date datetime, @tmpdate datetime, @years int, @months int, @days int
SELECT @date = '2/29/04'
SELECT @tmpdate = @date
SELECT @years = DATEDIFF(yy, @tmpdate, GETDATE()) - CASE WHEN (MONTH(@date) > MONTH(GETDATE())) OR (MONTH(@date) = MONTH(GETDATE()) AND DAY(@date) > DAY(GETDATE())) THEN 1 ELSE 0 END
SELECT @tmpdate = DATEADD(yy, @years, @tmpdate)
SELECT @months = DATEDIFF(m, @tmpdate, GETDATE()) - CASE WHEN DAY(@date) > DAY(GETDATE()) THEN 1 ELSE 0 END
SELECT @tmpdate = DATEADD(m, @months, @tmpdate)
SELECT @days = DATEDIFF(d, @tmpdate, GETDATE())
SELECT @years, @months, @days
相当老的问题，但我想分享我在计算年龄时所做的工作
[基于BUT两天之间的小时，结束日期被截断，这是一种简单的方法。
您是否要计算年龄的总天数/月数/年数？您有开始日期吗？还是您要剖析（例如：24年零1个月29天）？
这里是SQL代码，为您提供自sysdate以来的年数，月数和天数。输入此格式（dd_mon_yy）的input_birth_date的值。注意：输入年，月和日的相同值（出生日期），例如85年3月1日
DateTime值存储为浮点数。您可以相互减去日期，现在有了一个新的日期，即它们之间的时间跨度。
CREATE FUNCTION DBO.GET_AGE
(
@DATE AS DATETIME
)
RETURNS VARCHAR(MAX)
AS
BEGIN
DECLARE @YEAR AS VARCHAR(50) = ''
DECLARE @MONTH AS VARCHAR(50) = ''
DECLARE @DAYS AS VARCHAR(50) = ''
DECLARE @RESULT AS VARCHAR(MAX) = ''
SET @YEAR = CONVERT(VARCHAR,(SELECT DATEDIFF(MONTH,CASE WHEN DAY(@DATE) > DAY(GETDATE()) THEN DATEADD(MONTH,1,@DATE) ELSE @DATE END,GETDATE()) / 12 ))
SET @MONTH = CONVERT(VARCHAR,(SELECT DATEDIFF(MONTH,CASE WHEN DAY(@DATE) > DAY(GETDATE()) THEN DATEADD(MONTH,1,@DATE) ELSE @DATE END,GETDATE()) % 12 ))
SET @DAYS = DATEDIFF(DD,DATEADD(MM,CONVERT(INT,CONVERT(INT,@YEAR)*12 + CONVERT(INT,@MONTH)),@DATE),GETDATE())
SET @RESULT = (RIGHT('00' + @YEAR, 2) + ' YEARS ' + RIGHT('00' + @MONTH, 2) + ' MONTHS ' + RIGHT('00' + @DAYS, 2) + ' DAYS')
RETURN @RESULT
END
SELECT DBO.GET_AGE('04/12/1986')
DECLARE @BirthDate datetime, @AgeInMonths int
SET @BirthDate = '10/5/1971'
SET @AgeInMonths -- Determine the age in "months old":
= DATEDIFF(MONTH, @BirthDate, GETDATE()) -- .Get the difference in months
- CASE WHEN DATEPART(DAY,GETDATE()) -- .If today was the 1st to 4th,
< DATEPART(DAY,@BirthDate) -- (or before the birth day of month)
THEN 1 ELSE 0 END -- ... don't count the month.
SELECT @AgeInMonths / 12 as AgeYrs -- Divide by 12 months to get the age in years
,@AgeInMonths % 12 as AgeXtraMonths -- Get the remainder of dividing by 12 months = extra months
,DATEDIFF(DAY -- For the extra days, find the difference between,
,DATEADD(MONTH, @AgeInMonths -- 1. Last Monthly Birthday
, @BirthDate) -- (if birthdays were celebrated monthly)
,GETDATE()) as AgeXtraDays -- 2. Today's date.
对于那些想要在表中创建计算列以存储年龄的人：
这是给定生日和当前日期的年龄计算方法。
还有另一种计算年龄的方法是
尝试一下...
SELECT CASE WHEN
(DATEADD(year,DATEDIFF(year, @datestart ,@dateend) , @datestart) > @dateend)
THEN DATEDIFF(year, @datestart ,@dateend) -1
ELSE DATEDIFF(year, @datestart ,@dateend)
END
基本上是“ DateDiff（year ...”，它给出了该人今年的年龄，所以我只加一个案例说明，如果他们今年还没有生日，则减去1年，否则返回值。
declare @BirthDate datetime
declare @TotalYear int
declare @TotalMonths int
declare @TotalDays int
declare @TotalWeeks int
declare @TotalHours int
declare @TotalMinute int
declare @TotalSecond int
declare @CurrentDtTime datetime
set @BirthDate='1998/01/05 05:04:00' -- Set Your date here
set @TotalYear= FLOOR(DATEDIFF(DAY, @BirthDate, GETDATE()) / 365.25)
set @TotalMonths= FLOOR(DATEDIFF(DAY,DATEADD(year, @TotalYear,@BirthDate),GetDate()) / 30.436875E)
set @TotalDays= FLOOR(DATEDIFF(DAY, DATEADD(month, @TotalMonths,DATEADD(year,
@TotalYear,@BirthDate)), GETDATE()))
set @CurrentDtTime=CONVERT(datetime,CONVERT(varchar(50), DATEPART(year,
GetDate()))+'/' +CONVERT(varchar(50), DATEPART(MONTH, GetDate()))
+'/'+ CONVERT(varchar(50),DATEPART(DAY, GetDate()))+' '
+ CONVERT(varchar(50),DATEPART(HOUR, @BirthDate))+':'+
CONVERT(varchar(50),DATEPART(MINUTE, @BirthDate))+
':'+ CONVERT(varchar(50),DATEPART(Second, @BirthDate)))
set @TotalHours = DATEDIFF(hour, @CurrentDtTime, GETDATE())
if(@TotalHours < 0)
begin
set @TotalHours = DATEDIFF(hour,DATEADD(Day,-1, @CurrentDtTime), GETDATE())
set @TotalDays= @TotalDays -1
end
set @TotalMinute= DATEPART(MINUTE, GETDATE())-DATEPART(MINUTE, @BirthDate)
if(@TotalMinute < 0)
set @TotalMinute = DATEPART(MINUTE, DATEADD(hour,-1,GETDATE()))+(60-DATEPART(MINUTE,
@BirthDate))
set @TotalSecond= DATEPART(Second, GETDATE())-DATEPART(Second, @BirthDate)
Print 'Your age are'+ CHAR(13)
+ CONVERT(varchar(50), @TotalYear)+' Years, ' +
CONVERT(varchar(50),@TotalMonths) +' Months, ' +
CONVERT(varchar(50),@TotalDays)+' Days, ' +
CONVERT(varchar(50),@TotalHours)+' Hours, ' +
CONVERT(varchar(50),@TotalMinute)+' Minutes, ' +
CONVERT(varchar(50),@TotalSecond)+' Seconds. ' +char(13)+
'Your are born at day of week was - ' + CONVERT(varchar(50),DATENAME(dw ,
@BirthDate ))
+char(13)+char(13)+
+'Your Birthdate to till date your '+ CHAR(13)
+'Years - ' + CONVERT(varchar(50), FLOOR(DATEDIFF(DAY, @BirthDate, GETDATE()) /
365.25))
+' , Months - ' + CONVERT(varchar(50),DATEDIFF(MM,@BirthDate,getdate()))
+' , Weeks - ' + CONVERT(varchar(50),DATEDIFF(wk,@BirthDate,getdate()))
+' , Days - ' + CONVERT(varchar(50),DATEDIFF(dd,@BirthDate,getdate()))+char(13)+
+'Hours - ' + CONVERT(varchar(50),DATEDIFF(HH,@BirthDate,getdate()))
+' , Minutes - ' + CONVERT(varchar(50),DATEDIFF(mi,@BirthDate,getdate()))
+' , Seconds - ' + CONVERT(varchar(50),DATEDIFF(ss,@BirthDate,getdate()))
declare @StartDate datetime = '2016-01-31'
declare @EndDate datetime = '2016-02-01'
SELECT @StartDate AS [StartDate]
,@EndDate AS [EndDate]
,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END AS [Years]
,DATEDIFF(Month,(DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate)),@EndDate) - CASE WHEN DATEADD(Month, DATEDIFF(Month,DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate),@EndDate) , @StartDate) > @EndDate THEN 1 ELSE 0 END AS [Months]
,DATEDIFF(Day, DATEADD(Month,DATEDIFF(Month, (DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate)),@EndDate) - CASE WHEN DATEADD(Month, DATEDIFF(Month,DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate),@EndDate) , @StartDate) > @EndDate THEN 1 ELSE 0 END ,DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate)) ,@EndDate) - CASE WHEN DATEADD(Day,DATEDIFF(Day, DATEADD(Month,DATEDIFF(Month, (DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate)),@EndDate) - CASE WHEN DATEADD(Month, DATEDIFF(Month,DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate),@EndDate) , @StartDate) > @EndDate THEN 1 ELSE 0 END ,DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate)) ,@EndDate),DATEADD(Month,DATEDIFF(Month, (DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate)),@EndDate) - CASE WHEN DATEADD(Month, DATEDIFF(Month,DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate),@EndDate) , @StartDate) > @EndDate THEN 1 ELSE 0 END ,DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate) - CASE WHEN DATEADD(Year,DATEDIFF(Year,@StartDate,@EndDate), @StartDate) > @EndDate THEN 1 ELSE 0 END,@StartDate))) > @EndDate THEN 1 ELSE 0 END AS [Days]
select DOB as Birthdate,
YEAR(GETDATE()) as ThisYear,
YEAR(getdate()) - EAR(date1) as Age
from TableName
SELECT DOB AS Birthdate ,
YEAR(GETDATE()) AS ThisYear,
YEAR(getdate()) - YEAR(DOB) AS Age
FROM tableprincejain
DECLARE @DoB AS DATE = '1968-10-24'
DECLARE @cDate AS DATE = CAST('2000-10-23' AS DATE)
SELECT
--Get Year difference
DATEDIFF(YEAR,@DoB,@cDate) -
--Cases where year difference will be augmented
CASE
--If Date of Birth greater than date passed return 0
WHEN YEAR(@DoB) - YEAR(@cDate) >= 0 THEN DATEDIFF(YEAR,@DoB,@cDate)
--If date of birth month less than date passed subtract one year
WHEN MONTH(@DoB) - MONTH(@cDate) > 0 THEN 1
--If date of birth day less than date passed subtract one year
WHEN MONTH(@DoB) - MONTH(@cDate) = 0 AND DAY(@DoB) - DAY(@cDate) > 0 THEN 1
--All cases passed subtract zero
ELSE 0
END
通过文本获取年龄的简单方法如下：
这里是一个（略）简单的版本：
与功能相同。
create procedure getDatedifference
(
@startdate datetime,
@enddate datetime
)
as
begin
declare @monthToShow int
declare @dayToShow int
--set @startdate='01/21/1934'
--set @enddate=getdate()
if (DAY(@startdate) > DAY(@enddate))
begin
set @dayToShow=0
if (month(@startdate) > month(@enddate))
begin
set @monthToShow= (12-month(@startdate)+ month(@enddate)-1)
end
else if (month(@startdate) < month(@enddate))
begin
set @monthToShow= ((month(@enddate)-month(@startdate))-1)
end
else
begin
set @monthToShow= 11
end
-- set @monthToShow= convert(int, DATEDIFF(mm,0,DATEADD(dd,DATEDIFF(dd,0,@enddate)- DATEDIFF(dd,0,@startdate),0)))-((convert(int,FLOOR(DATEDIFF(day, @startdate, @enddate) / 365.25))*12))-1
if(@monthToShow<0)
begin
set @monthToShow=0
end
declare @amonthbefore integer
set @amonthbefore=Month(@enddate)-1
if(@amonthbefore=0)
begin
set @amonthbefore=12
end
if (@amonthbefore in(1,3,5,7,8,10,12))
begin
set @dayToShow=31-DAY(@startdate)+DAY(@enddate)
end
if (@amonthbefore=2)
begin
IF (YEAR( @enddate ) % 4 = 0 AND YEAR( @enddate ) % 100 != 0) OR YEAR( @enddate ) % 400 = 0
begin
set @dayToShow=29-DAY(@startdate)+DAY(@enddate)
end
else
begin
set @dayToShow=28-DAY(@startdate)+DAY(@enddate)
end
end
if (@amonthbefore in (4,6,9,11))
begin
set @dayToShow=30-DAY(@startdate)+DAY(@enddate)
end
end
else
begin
--set @monthToShow=convert(int, DATEDIFF(mm,0,DATEADD(dd,DATEDIFF(dd,0,@enddate)- DATEDIFF(dd,0,@startdate),0)))-((convert(int,FLOOR(DATEDIFF(day, @startdate, @enddate) / 365.25))*12))
if (month(@enddate)< month(@startdate))
begin
set @monthToShow=12+(month(@enddate)-month(@startdate))
end
else
begin
set @monthToShow= (month(@enddate)-month(@startdate))
end
set @dayToShow=DAY(@enddate)-DAY(@startdate)
end
SELECT
FLOOR(DATEDIFF(day, @startdate, @enddate) / 365.25) as [yearToShow],
@monthToShow as monthToShow ,@dayToShow as dayToShow ,
convert(varchar,FLOOR(DATEDIFF(day, @startdate, @enddate) / 365.25)) +' Year ' + convert(varchar,@monthToShow) +' months '+convert(varchar,@dayToShow)+' days ' as age
return
end
我使用我修改过的此功能（天部分），来自@Dane答案：https://stackoverflow.com/a/57720/2097023
我已经看过几次这个问题了，结果输出的是年，月，日，但是从来没有数字/小数的结果。 （至少没有一个不会四舍五入的错误）。欢迎对此功能提出反馈。可能仍不需要一点调整。