我有一个表，上面列出了人们的出生日期(目前是nvarchar(25))
我如何将其转换为日期，然后以年为单位计算他们的年龄?
我的数据如下所示
ID Name DOB
1 John 1992-01-09 00:00:00
2 Sally 1959-05-20 00:00:00
我希望看到:
ID Name AGE DOB
1 John 17 1992-01-09 00:00:00
2 Sally 50 1959-05-20 00:00:00
当前回答
如果你找到你的年龄。 Select (months_between(sysdate,dob)/12) from table_name 如果你找到你的大致年龄。 从table_name中选择round(months_between(sysdate,dob)/12);在这里输入代码 dob是列名。用于当前日期的Sysdate。Months_between用于查找dob到当前日期的总月份
其他回答
Declare @dob datetime
Declare @today datetime
Set @dob = '05/20/2000'
set @today = getdate()
select CASE
WHEN dateadd(year, datediff (year, @dob, @today), @dob) > @today
THEN datediff (year, @dob, @today) - 1
ELSE datediff (year, @dob, @today)
END as Age
所以上面的很多解决方案都是错误的DateDiff(yy，@Dob， @PassedDate)不会考虑两个日期的月和日。同样，只有在正确排序的情况下，省道部件才能进行比较。
下面的代码非常简单:
create function [dbo].[AgeAtDate](
@DOB datetime,
@PassedDate datetime
)
returns int
with SCHEMABINDING
as
begin
declare @iMonthDayDob int
declare @iMonthDayPassedDate int
select @iMonthDayDob = CAST(datepart (mm,@DOB) * 100 + datepart (dd,@DOB) AS int)
select @iMonthDayPassedDate = CAST(datepart (mm,@PassedDate) * 100 + datepart (dd,@PassedDate) AS int)
return DateDiff(yy,@DOB, @PassedDate)
- CASE WHEN @iMonthDayDob <= @iMonthDayPassedDate
THEN 0
ELSE 1
END
End
declare @birthday as datetime
set @birthday = '2000-01-01'
declare @today as datetime
set @today = GetDate()
select
case when ( substring(convert(varchar, @today, 112), 5,4) >= substring(convert(varchar, @birthday, 112), 5,4) ) then
(datepart(year,@today) - datepart(year,@birthday))
else
(datepart(year,@today) - datepart(year,@birthday)) - 1
end
SELECT ID,
Name,
DATEDIFF(yy,CONVERT(DATETIME, DOB),GETDATE()) AS AGE,
DOB
FROM MyTable
我已经在我们的生产代码中使用这个查询近10年了:
SELECT FLOOR((CAST (GetDate() AS INTEGER) - CAST(Date_of_birth AS INTEGER)) / 365.25) AS Age
