将分钟舍入到小时和刻钟 (SQL)

Question

I have a total of minutes and I am trying to convert these minutes in hours and quarters of hours, for instance:

513 minutes / 60 = 8.55 -> so would be 8.3 hours
485 minutes / 60 = 8.083 -> 8 hours

How can I do this using SQL?

I have been searching and what I found was this, but doesn't work for me:

@mins is the variable where I am storing the minutes.

set @mins = dateadd(minute, datediff(minute,0,@mins) / 15 * 15, 0)

Answer 1

Assuming that you can't have times that are 24 or more hours, you could do something like:

SELECT CONCAT(DATEPART(HOUR,T.[Time]),'.',DATEPART(MINUTE,T.[Time]) /10)
FROM (VALUES(513),(485),(107))V(YourColumn)
     CROSS APPLY(VALUES(DATEADD(MINUTE, YourColumn, CONVERT(time(0),'00:00')))) T([Time]);

But, like I mention in my comment under the question, this feels like the beginnings of an XY problem .

Answer 2

This appears to do what you want, rounding down to the nearest 15 minutes and then treating that as "decimal" hours:

select mins / 60 + (((mins % 60)) / 15) * 0.15
from (values (513), (485)) v(mins)

Using a number to represent the minutes is really misleading and likely to result in errors downstream, when 8.3 is interpreted as 8.3 hours -- which is 498 minutes.

I would strongly encourage you to represent the value as a proper time value. You can generate that using:

timefromparts(mins / 60, (((mins % 60)) / 15) * 15, 0, 0, 0)

Here is a db<>fiddle.

Answer 3

DECLARE @MinutesTotal   int
DECLARE @QuatersTotal   int
DECLARE @HoursOut       int
DECLARE @QuatersOut     numeric(10,2)

SET @MinutesTotal   =   
                --      513 --  8:30 
                --      485 --  8:00 
                        166 --  2:45    

SET @QuatersTotal   =   @MinutesTotal / 15                          
SET @HoursOut       =   @QuatersTotal /  4                          
SET @QuatersOut     =   (@QuatersTotal - (@HoursOut * 4)) * 15



DECLARE @ResultTime time = '00:00'

SET     @ResultTime = DATEADD(HOUR  , @HoursOut     , @ResultTime)
SET     @ResultTime = DATEADD(MINUTE, @QuatersOut   , @ResultTime)

SELECT  
        @ResultTime 
    ,   ResultAsString  =   CONVERT(varchar(5), @ResultTime )
    ,   ResultAsDecimal =   @HoursOut + (@QuatersOut / 100)

Answer 4

I think that you want this arithmetics:

select @min / 60 + @min % 60 / 100.0

This gives you the number of hours as an integer, followed by the remaining number of minutes in the decimal part, so for your sample data this yields 8.33 and 8.05 respectively.

On the other hand, if you want the decimal part to represents the number of quarters of hours, then:

select @min / 60 + @min % 60 / 15 / 10.0

This produces 8.2 and 8.0 .