Tsql 如何在T-SQL中使用年、月和日计算年龄
在T-SQL（SQL Server 2000）中，以年、月、日为单位计算某人年龄的最佳方法是什么Tsql 如何在T-SQL中使用年、月和日计算年龄,tsql,datediff,Tsql,Datediff,在T-SQL（SQL Server 2000）中，以年、月、日为单位计算某人年龄的最佳方法是什么 datediff函数不能很好地处理年份边界，另外，将月份和天数分开将是一个难题。我知道我可以在客户端相对容易地完成这项工作，但我希望在我的计算机中完成。您是否正在尝试计算一个年龄段的总天数/月数/年数？你有开始的日期吗？或者你正在试图解剖它（例如：24年，1个月，29天） 如果您有正在使用的开始日期，datediff将使用以下命令输出总天数/月数/年数： Select DateDiff(d,'198
datediffSelect DateDiff(d,'1984-07-12','2008-09-11')
Select DateDiff(m,'1984-07-12','2008-09-11')
Select DateDiff(yyyy,'1984-07-12','2008-09-11')
现在，如果你想做解剖法，你必须减去年数（天-365*年），然后再进一步计算得到月数，等等。下面是一些T-SQL，它给出了自@date中指定的日期起的年数、月数和日数。它考虑到DATEDIFF（）计算差异的事实，而不考虑它是哪一个月或哪一天（因此8/31和9/1之间的月差异是1个月），并使用case语句处理该差异，在适当的情况下递减结果
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
CREATE PROCEDURE dbo.CalculateAge
@dayOfBirth datetime
AS
DECLARE @today datetime, @thisYearBirthDay datetime
DECLARE @years int, @months int, @days int
SELECT @today = GETDATE()
SELECT @thisYearBirthDay = DATEADD(year, DATEDIFF(year, @dayOfBirth, @today), @dayOfBirth)
SELECT @years = DATEDIFF(year, @dayOfBirth, @today) - (CASE WHEN @thisYearBirthDay > @today THEN 1 ELSE 0 END)
SELECT @months = MONTH(@today - @thisYearBirthDay) - 1
SELECT @days = DAY(@today - @thisYearBirthDay) - 1
SELECT @years, @months, @days
GO
与函数的类型相同
create function [dbo].[Age](@dayOfBirth datetime, @today datetime)
RETURNS varchar(100)
AS
Begin
DECLARE @thisYearBirthDay datetime
DECLARE @years int, @months int, @days int
set @thisYearBirthDay = DATEADD(year, DATEDIFF(year, @dayOfBirth, @today), @dayOfBirth)
set @years = DATEDIFF(year, @dayOfBirth, @today) - (CASE WHEN @thisYearBirthDay > @today THEN 1 ELSE 0 END)
set @months = MONTH(@today - @thisYearBirthDay) - 1
set @days = DAY(@today - @thisYearBirthDay) - 1
return cast(@years as varchar(2)) + ' years,' + cast(@months as varchar(2)) + ' months,' + cast(@days as varchar(3)) + ' days'
end
创建过程getDatedifference
(
@开始日期时间，
@结束日期日期时间
)
作为
开始
声明@monthToShow int
声明@dayToShow int
--设置为@startdate='1/21/1934'
--set@enddate=getdate（）
如果（天（@startdate）>天（@enddate））
开始
设置@dayToShow=0
如果（月（@startdate）>月（@enddate））
开始
设置@monthToShow=（12个月（@startdate）+月（@enddate）-1）
结束
如果（月（@startdate）<月（@enddate））
开始
设置@monthToShow=（（月（@enddate）-month（@startdate））-1）
结束
其他的
开始
设置@monthToShow=11
结束
--设置@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））-1
如果（@monthToShow试试这个
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，“DateDiff（year…”给出了这个人今年的年龄，所以我只添加了一个案例说明，如果他们今年还没有过生日，那么减去1年，否则返回值。我多次看到这个问题，结果输出年、月、日，但从来没有数字/十进制结果。（至少没有一个圆不正确）。
我欢迎对该功能的反馈。可能还不需要进行一些调整
--函数的输入是两个日期。
--输出是十进制（7,4）格式的两个日期之间的年数。
--输出总是一个正整数
--注意：如果差值大于999.9999，则不处理输出
--逻辑基于三个步骤。
--1）差异是否小于1年（0.5000、0.3333、0.6667等）
--2）差值是否正好是一个整数年（1、2、3等）
--3）（否则）…区别是年和天数。（1.5000、2.3333、7.6667等）
`DateTime
T-SQL中的值存储为浮点数。您可以将日期相互减去，现在就有了一个新日期，即它们之间的时间跨度
declare @birthdate datetime
set @birthdate = '6/15/1974'
--age in years - short version
print year(getdate() - @birthdate) - year(0)
--age in years - visualization
declare @mindate datetime
declare @span datetime
set @mindate = 0
set @span = getdate() - @birthdate
print @mindate
print @birthdate
print getdate()
print @span
--substract minyear from spanyear to get age in years
print year(@span) - year(@mindate)
print month(@span)
print day(@span)
下面是SQL代码，它提供自sysdate以来的年、月和日数。
输入此格式（dd_mon_yy）的输入值。注：输入年、月和日的相同值（出生日期），如85年3月1日
select trunc((sysdate -to_date('&input_birth_date_dd_mon_yy'))/365) years,
trunc(mod(( sysdate -to_date('&input_birth_date_dd_mon_yy'))/365,1)*12) months,
trunc((mod((mod((sysdate -to_date('&input_birth_date_dd_mon_yy'))/365,1)*12),1)*30)+1) days
from dual
很老的问题，但我想和大家分享一下我在计算年龄方面做了些什么
Declare @BirthDate As DateTime
Set @BirthDate = '1994-11-02'
SELECT DATEDIFF(YEAR,@BirthDate,GETDATE()) - (CASE
WHEN MONTH(@BirthDate)> MONTH(GETDATE()) THEN 1
WHEN MONTH(@BirthDate)= MONTH(GETDATE()) AND DAY(@BirthDate) > DAY(GETDATE()) THEN 1
Else 0 END)
声明@BirthDate datetime，@AgeInMonths int
设定出生日期='1971年10月5日'
设置@AgeInMonths——确定“月龄”中的年龄：
=DATEDIFF（月，@BirthDate，GETDATE（））--。以月为单位获取差值
-DATEPART（DAY，GETDATE（））时的大小写-。如果今天是第1到第4天，
获取文本年龄的简单方法如下：
Select cast((DATEDIFF(m, date_of_birth, GETDATE())/12) as varchar) + ' Y & ' +
cast((DATEDIFF(m, date_of_birth, GETDATE())%12) as varchar) + ' M' as Age
结果格式为：
**63 Y & 2 M**
用ISO格式的日期通过算术实现。
测试用例
天数的计算方法与公认的答案不同，差异如下所示：
逐案陈述的简短版本：
如果您只想要年和月的年龄，可以更简单
set @years = ( @now_i/100 - @dob_i/100)/100
set @months =(12 + month(@now) - month(@dob))%12
select @years,@months -- 1, 0
注意：对于希望在表中创建计算列以存储年龄的人来说，这是一个非常有用的链接：
CASE WHEN DateOfBirth< DATEADD(YEAR, (DATEPART(YEAR, GETDATE()) - DATEPART(YEAR, DateOfBirth))*-1, GETDATE())
THEN DATEPART(YEAR, GETDATE()) - DATEPART(YEAR, DateOfBirth)
ELSE DATEPART(YEAR, GETDATE()) - DATEPART(YEAR, DateOfBirth) -1 END
DateOfBirth
以下是我根据出生日期和当前日期计算年龄的方法
select case
when cast(getdate() as date) = cast(dateadd(year, (datediff(year, '1996-09-09', getdate())), '1996-09-09') as date)
then dateDiff(yyyy,'1996-09-09',dateadd(year, 0, getdate()))
else dateDiff(yyyy,'1996-09-09',dateadd(year, -1, getdate()))
end as MemberAge
go
有一种简单的方法，基于两天之间的小时数，但结束日期被截断
SELECT CAST(DATEDIFF(hour,Birthdate,CAST(GETDATE() as Date))/8766.0 as INT) AS Age FROM <YourTable>
选择CAST（DATEDIFF（小时）、生日、CAST（GETDATE
declare @now date,@dob date, @now_i int,@dob_i int, @days_in_birth_month int
declare @years int, @months int, @days int
set @now = '2013-02-28'
set @dob = '2012-02-29' -- Date of Birth
set @now_i = convert(varchar(8),@now,112) -- iso formatted: 20130228
set @dob_i = convert(varchar(8),@dob,112) -- iso formatted: 20120229
set @years = ( @now_i - @dob_i)/10000
-- (20130228 - 20120229)/10000 = 0 years
set @months =(1200 + (month(@now)- month(@dob))*100 + day(@now) - day(@dob))/100 %12
-- (1200 + 0228 - 0229)/100 % 12 = 11 months
set @days_in_birth_month = day(dateadd(d,-1,left(convert(varchar(8),dateadd(m,1,@dob),112),6)+'01'))
set @days = (sign(day(@now) - day(@dob))+1)/2 * (day(@now) - day(@dob))
+ (sign(day(@dob) - day(@now))+1)/2 * (@days_in_birth_month - day(@dob) + day(@now))
-- ( (-1+1)/2*(28 - 29) + (1+1)/2*(29 - 29 + 28))
-- Explain: if the days of now is bigger than the days of birth, then diff the two days
-- else add the days of now and the distance from the date of birth to the end of the birth month
select @years,@months,@days -- 0, 11, 28
dob now years months days
2012-02-29 2013-02-28 0 11 28 --Days will be 30 if calculated by the approach in accepted answer.
2012-02-29 2016-02-28 3 11 28 --Days will be 31 if calculated by the approach in accepted answer, since the day of birth will be changed to 28 from 29 after dateadd by years.
2012-02-29 2016-03-31 4 1 2
2012-01-30 2016-02-29 4 0 30
2012-01-30 2016-03-01 4 1 2 --Days will be 1 if calculated by the approach in accepted answer, since the day of birth will be changed to 30 from 29 after dateadd by years.
2011-12-30 2016-02-29 4 1 30
set @days = CASE WHEN day(@now) >= day(@dob) THEN day(@now) - day(@dob)
ELSE @days_in_birth_month - day(@dob) + day(@now) END
set @years = ( @now_i/100 - @dob_i/100)/100
set @months =(12 + month(@now) - month(@dob))%12
select @years,@months -- 1, 0
CASE WHEN DateOfBirth< DATEADD(YEAR, (DATEPART(YEAR, GETDATE()) - DATEPART(YEAR, DateOfBirth))*-1, GETDATE())
THEN DATEPART(YEAR, GETDATE()) - DATEPART(YEAR, DateOfBirth)
ELSE DATEPART(YEAR, GETDATE()) - DATEPART(YEAR, DateOfBirth) -1 END
select case
when cast(getdate() as date) = cast(dateadd(year, (datediff(year, '1996-09-09', getdate())), '1996-09-09') as date)
then dateDiff(yyyy,'1996-09-09',dateadd(year, 0, getdate()))
else dateDiff(yyyy,'1996-09-09',dateadd(year, -1, getdate()))
end as MemberAge
go
SELECT CAST(DATEDIFF(hour,Birthdate,CAST(GETDATE() as Date))/8766.0 as INT) AS Age FROM <YourTable>
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
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
CREATE FUNCTION dbo.EdadAMD
(
@FECHA DATETIME
)
RETURNS NVARCHAR(10)
AS
BEGIN
DECLARE
@tmpdate DATETIME
, @years INT
, @months INT
, @days INT
, @EdadAMD NVARCHAR(10);
SELECT @tmpdate = @FECHA;
SELECT @years = DATEDIFF(yy, @tmpdate, GETDATE()) - CASE
WHEN (MONTH(@FECHA) > MONTH(GETDATE()))
OR (
MONTH(@FECHA) = MONTH(GETDATE())
AND DAY(@FECHA) > DAY(GETDATE())
) THEN
1
ELSE
0
END;
SELECT @tmpdate = DATEADD(yy, @years, @tmpdate);
SELECT @months = DATEDIFF(m, @tmpdate, GETDATE()) - CASE
WHEN DAY(@FECHA) > DAY(GETDATE()) THEN
1
ELSE
0
END;
SELECT @tmpdate = DATEADD(m, @months, @tmpdate);
IF MONTH(@FECHA) = MONTH(GETDATE())
AND DAY(@FECHA) > DAY(GETDATE())
SELECT @days =
DAY(EOMONTH(GETDATE(), -1)) - (DAY(@FECHA) - DAY(GETDATE()));
ELSE
SELECT @days = DATEDIFF(d, @tmpdate, GETDATE());
SELECT @EdadAMD = CONCAT(@years, 'a', @months, 'm', @days, 'd');
RETURN @EdadAMD;
END;
GO
FirstName LastName DOB
sai krishnan 1991-11-04
Harish S A 1998-10-11
Select datediff(MONTH,DOB,getdate())/12 as dates from [Organization].[Employee]
firstname dates
sai 27
Harish 20
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()))
Your age are
22 Years, 0 Months, 2 Days, 11 Hours, 30 Minutes, 16 Seconds.
Your are born at day of week was - Monday
Your Birthdate to till date your
Years - 22 , Months - 264 , Weeks - 1148 , Days - 8037
Hours - 192899 , Minutes - 11573970 , Seconds - 694438216