Convert string to seconds of time [duplicate] - sql

Question

I have table name tblAttend in which one column named WorkHrs is of datatype varchar.
The result of simple select query is
I sum this column's value and get result in seconds my query is
select sum(DATEDIFF(SECOND, '0:00:00', WorkHrs ))
from tblAttend
and it shows this output:
Now the issue is, when sum of WorkHrs is greater than 24 hours it will throw an error:
What can you suggest to get around this problem? Thanks in advance

Answer 1

Try splitting each time into its component parts by converting the time to a string and then multiplying by the number of seconds relevant to each part.
Data conversion to integer is implicit
select Sum(Left(WorkHrs,2) * 3600 + substring(WorkHrs, 4,2) * 60 + substring(WorkHrs, 7,2))
from tblAttend

Answer 2

Try:
DECLARE #DURATION TIME = '01:43:24'
SELECT DATEDIFF(SECOND, '1/1/1900', CONVERT(DATETIME, #DURATION))

Answer 3

Try this:
SELECT DATEDIFF(SECOND, CONVERT(DATE,GETDATE()), GETDATE())

Answer 4

I have implemented the following function to use it in the management of my projects :
/****** Object: UserDefinedFunction [dbo].[Seconds] Script Date: 10/6/2017 12:00:22 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
/*
select [dbo].[Seconds]('24:00:00'),(24*3600)
select [dbo].[Seconds]('102:56:08'),(102*3600+56*60+8)
*/
ALTER FUNCTION [dbo].[Seconds] (#Time as varchar(50))
RETURNS int
BEGIN
declare #S int, #H int
set #H=cast(SUBSTRING(#Time,1,CHARINDEX(':',#Time)-1) as int)
IF #H<24
set #S=DATEDIFF(SECOND, '0:00:00', #Time)
ELSE BEGIN
set #H=#H-23
set #Time = '23'+SUBSTRING(#Time,CHARINDEX(':',#Time),LEN(#Time)-2)
set #S = (#H*3600)+DATEDIFF(SECOND, '0:00:00', #Time)
END
RETURN #S
END

Answer 5

You may try like this:
SELECT Sec=SUM((DATEPART(HOUR,column name)*3600)+(DATEPART(MINUTE,column name)*60)+(DATEPART(Second,column name)))
FROM [TableName]

Answer 6

You need to convert your WorkHrs to DATETIME first, then perform the DATEDIFF:
WITH Cte(WorkHrs) AS(
SELECT CAST('02:29:11' AS VARCHAR(10)) UNION ALL
SELECT CAST('21:00:00' AS VARCHAR(10)) UNION ALL
SELECT CAST('25:20:02' AS VARCHAR(10))
),
CteConvert(dt) AS(
SELECT
DATEADD(
SECOND,
CAST(SUBSTRING(WorkHrs, 7, 2) AS INT),
DATEADD(
MINUTE,
CAST(SUBSTRING(WorkHrs, 4, 2) AS INT),
DATEADD(
HOUR,
CAST(SUBSTRING(WorkHrs,1, 2) AS INT),
0
)
)
)
FROM Cte
)
SELECT
SUM(DATEDIFF(SECOND, 0, dt)),
-- Formatted to hh:mm:sss
RIGHT('0' + RTRIM(CONVERT(CHAR(2), SUM(DATEDIFF(SECOND, 0, dt)) / (60 * 60))), 2) + ':' +
RIGHT('0' + RTRIM(CONVERT(CHAR(2), (SUM(DATEDIFF(SECOND, 0, dt)) / 60) % 60)), 2) + ':' +
RIGHT('0' + RTRIM(CONVERT(CHAR(2), SUM(DATEDIFF(SECOND, 0, dt)) % 60)),2)
FROM CteConvert

Answer 7

;with cte as (
select
total =Sum(Left(WorkHrs,2) * 3600 + substring(WorkHrs, 4,2) * 60 + substring(WorkHrs, 7,2))
from tblAttend
)
select
total [Total Time in Seconds],
(total / 3600) [Total Time Hour Part],
((total % 3600) / 60) [Total Time Minute Part],
(total % 60) [Total Time Second Part]
from cte

Answer 8

I think you can isolate each part of the time (hour, minute and second) and than sum what you need, please take a look:
declare #tbl table(WorkHrs VARCHAR(8))
insert into #tbl(WorkHrs) values ('02:29:11')
insert into #tbl(WorkHrs) values ('25:00:11')
-- 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
-- Or try to 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
It will return like this to you:
I hope it can help

Answer 9

You can simply use the TIME_TO_SEC function:
SELECT TIME_TO_SEC(WorkHrs) FROM tblAttend;