本以為sqlserver自帶這種根據出生日期自動算年齡而且能精確到天的函式，結果上網找半天也沒找到，只找到些能算到幾歲的。就自己寫了個。大神應該有一行程式碼搞定的辦法，本人的能力只能千行才搞定-->-->

有更好辦法的趕緊來嘲諷我吧。

declare @Age varchar(100),@now datetime, @birthYear int, @birthMonth int, @birthDay int,
@nowYear int,@nowMonth int,@nowDay int,@AgeMonth int,@BirthMonthMaxDays int,@lastBirth int
set @now=GETDATE()
set @birthYear=DateName(year,@dBirthday)
set @birthMonth=DateName(month,@dBirthday)
set @birthDay=DateName(day,@dBirthday)
set @nowYear=DateName(year,GetDate())
set @nowMonth=DateName(month,GetDate())
set @nowDay=DateName(day,GetDate())
set @lastBirth=DATEDIFF(year,@dBirthday,@now)
set @AgeMonth=DATEDIFF(MONTH, dateadd(year,@lastBirth-1,@dBirthday) ,@now) 
set @BirthMonthMaxDays=cast(32-DAY(@dBirthday+32-DAY(@dBirthday)) as int)


if @now>

[email protected] 
begin
set @Age=
case when @lastBirth>0 then
(case when  (@nowMonth>@birthMonth) then cast(@lastBirth as varchar)+'歲'
 when ((@[email protected])and(@nowDay>[email protected])) then  cast(@lastBirth as varchar)+'歲'
 when @nowMonth<@birthMonth and(@lastBirth-1<>0) then cast(@lastBirth-1 as varchar)+'歲'
 else ''
end) 
else '' end +


ltrim(case when @nowMonth>@birthMonth then cast(@

[email protected] as varchar)+'個月' 
when @nowMonth<@birthMonth and [email protected][email protected]<>0  then cast([email protected][email protected] as varchar)+'個月' 
when @[email protected] then case when @nowDay<@birthDay then '11個月' else''end
else ''end) +


case when @nowDay<@birthDay then cast(@

[email protected][email protected] as varchar)+'天'
when @nowDay>@birthDay then cast(@[email protected] as varchar) +'天'
else ''end
end
else
begin
  set @Age='輸入出生日期有誤'
end
return @Age