Convert HH:MM:SS string to number of minutes

Question

I have the below query.

select cast(dateadd(minute, datediff(minute, TimeIn, TimeOut), 0) as time(0) )

I get the results from two columns in th

Answer 1

Unfortunately, if you want to use DATEPART function for values with more than 24 hours, you will receive an error:

Conversion failed when converting date and/or time from character string."

You can test it with this code:

declare @Time DATETIME = '32:00:00'
select ((DATEPART(HOUR, @Time)*60) + (DATEPART(MINUTE, @Time)))

To solve this, I worked with this another approach:

declare @tbl table(WorkHrs VARCHAR(8))
insert into @tbl(WorkHrs) values ('02:47:00')
insert into @tbl(WorkHrs) values ('32:00:00')
-- Sum in minutes
SELECT TRY_CAST(([HOURS] * 60) + [MINUTES] + ([SECOND] / 60) AS INT) as TotalInMinutes
FROM (
SELECT 
    -- Use this aproach to get separated values 
    SUBSTRING(WorkHrs,1,CHARINDEX(':',WorkHrs)-1) AS [HOURS],
    SUBSTRING(WorkHrs,4,CHARINDEX(':',WorkHrs)-1) AS [MINUTES],
    SUBSTRING(WorkHrs,7,CHARINDEX(':',WorkHrs)-1) AS [SECOND] -- probably you can ignore this one
    FROM @tbl
)
tbl
-- Sum in seconds
    SELECT TRY_CAST(([HOURS] * 3600) + ([MINUTES] * 60) + [SECOND] AS INT) as TotalInSeconds
    FROM (
    SELECT 
    -- Use this aproach to get separated values 
    SUBSTRING(WorkHrs,1,CHARINDEX(':',WorkHrs)-1) AS [HOURS],
    SUBSTRING(WorkHrs,4,CHARINDEX(':',WorkHrs)-1) AS [MINUTES],
    SUBSTRING(WorkHrs,7,CHARINDEX(':',WorkHrs)-1) AS [SECOND]
    FROM @tbl
)
tbl

This code will return like this: