SELECT中的Cap字段值

Question

我试图限制特定字段,以便它们不超过特定值.

例如,这样的东西就足够了,我可以指定一个字段不应超过8:

SELECT (
        cap(t.MondayHrs,8) 
        + cap(t.TuesdayHrs,8)
        + cap(t.WednesdayHrs,8)
        + cap(t.ThursdayHrs,8)
        + cap(t.FridayHrs,8)
       ) as TotalHours

如果MondayHrs = 7,则应将其添加到TotalHours为7.如果MondayHrs = 10,则应将其添加到TotalHours为8(我的上限值)

T-SQL内置了什么可以促进这一点？

Answer 1

create function Cap (@Value float,@maxValue float) Returns float 
as
begin
Declare @Result float
if @Value > @maxValue select @Result=@Maxvalue else select @Result=@Value
Return @Result
end;

用法

Select dbo.Cap(1,10),dbo.Cap(11,10)

Answer 2

尝试...

select least(t.MondayHrs,8) 
    + least(t.TuesdayHrs,8)
    + least(t.WednesdayHrs,8)
    + least(t.ThursdayHrs,8)
    + least(t.FridayHrs,8)
   ) as TotalHours