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calculating total time using timestamp


calculating total time using timestamp

By : Иван Гнатюк
Date : November 18 2020, 03:49 PM
it helps some times Okay, there are multiple possible answers.
If you are sure, that you have an entry for every second in your table, you can simply do this:
code :
select
id, `binary`,
sec_to_time(count(distinct `timestamp`))
from
t
where `timestamp` between concat(curdate(), ' 00:00:00') and concat(curdate(), ' 23:59:59')
/*you could also do 
  where date(timestamp) = curdate()
but having a function on a column does not allow MySQL to use an index*/
group by id, `binary`
SELECT `binary`, SEC_TO_TIME(SUM(secondsOnOffPerGroup))
FROM (
    SELECT
    id, `binary`, valueChangeGroup, TIMESTAMPDIFF(SECOND, MIN(`timestamp`), MAX(`timestamp`)) + 1 as secondsOnOffPerGroup
    FROM (
        SELECT
        t.*,
        @valueChangeGroup := IF(@prevB != `binary`, @valueChangeGroup + 1, @valueChangeGroup) as valueChangeGroup,
        @prevB := `binary`
        FROM
        t
        , (SELECT @prevB := null, @valueChangeGroup := 0) var_init_subquery_alias
        WHERE 
        `timestamp` between concat(curdate(), ' 00:00:00') and concat(curdate(), ' 23:59:59')
        ORDER BY id, `timestamp`
    ) sq
    GROUP BY id, `binary`, valueChangeGroup
) sq2
GROUP BY `binary`


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Calculating total time that falls outside of dataset within date/time range

Calculating total time that falls outside of dataset within date/time range


By : Clinton Curry
Date : March 29 2020, 07:55 AM
hop of those help? I have a table Integers already created, which I use for stuff like this.
Given that, you want:
code :
drop table foo 
go

create table foo (
   c_id int not null,
   d_id int not null,
   datein datetime not null,
   dateout datetime not null
)
go


insert into foo values (1, 1, '04/01/2010 08:45', '04/01/2010 11:45')
insert into foo values (2, 1, '04/01/2010 09:00', '04/01/2010 12:15')
insert into foo values (3, 1, '04/01/2010 10:00', '04/01/2010 12:00')
insert into foo values (4, 1, '04/01/2010 12:30', '04/01/2010 17:00')
insert into foo values (1, 1, '04/01/2010 12:45', '04/01/2010 17:15')
insert into foo values (3, 1, '04/01/2010 13:00', '04/01/2010 17:25')
go


drop procedure unmanned
go

create procedure unmanned
   @d_id int,
   @start datetime,
   @end datetime

as

select distinct dateadd(ss,i_int,@start)
 from Integers 
      left join foo on dateadd(ss,i_int,@start) >= datein and dateadd(ss,i_int,@start) < dateout


where i_int between 0 and 60*60*24
and dateadd(ss,i_int,@start) >= @start and dateadd(ss,i_int,@start)< @end
and datein is null
order by 1

go

exec unmanned 1, '4/1/10 8:30', '4/1/10 17:30'
Calculating total time left and total time from a background worker OnProgressChanged event

Calculating total time left and total time from a background worker OnProgressChanged event


By : NullPointerException
Date : March 29 2020, 07:55 AM
I wish this help you The problem is that you're working off the last progress time, which will likely fluctuate as you go. If you work from the starting time and the current time, and use the percentage complete, then you'll find that the time "self adjusts" as you move along.
For example, if you store DateTime.Now into a variable (such as m_operationStart, using your naming), you could write:
code :
private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
  if (e.ProgressPercentage != 0)
  {
    double percentageComplete = (double)e.ProgressPercentage / m_csNumLines;

    TimeSpan timeSinceStart = DateTime.Now.Subtract(m_operationStart);
    TimeSpan totalTime = TimeSpan.FromMilliseconds(timeSinceStart.TotalMilliseconds / percentageComplete);
    TimeSpan timeLeft = totalTime - timeSinceStart;

    Console.WriteLine("TotalEstTime: " + totalTime + " TimeLeft: " + timeLeft);


    // Update the progress label
    resultLabel.Text = "Line " + e.ProgressPercentage.ToString() + " of " + m_csNumLines + " at " + (int)(100.0 * percentageComplete) + "% loaded";
  }
  else
    resultLabel.Text = "Line " + e.ProgressPercentage.ToString() + " of " + m_csNumLines;
}
Calculating total time excluding overlapped time & breaks in SQLServer

Calculating total time excluding overlapped time & breaks in SQLServer


By : user2693291
Date : March 29 2020, 07:55 AM
this one helps. From the list of start time and end times from a select query, I need to find out the total time excluding overlapping time and breaks.
code :
DECLARE @table TABLE (StartTime DateTime2, EndTime DateTime2)

INSERT INTO @table SELECT '2014-10-01 10:30:00.000', '2014-10-01 12:00:00.000'
INSERT INTO @table SELECT '2014-10-01 10:40:00.000', '2014-10-01 12:00:00.000'
INSERT INTO @table SELECT '2014-10-01 10:42:00.000', '2014-10-01 12:20:00.000'
INSERT INTO @table SELECT '2014-10-01 10:40:00.000', '2014-10-01 13:00:00.000'
INSERT INTO @table SELECT '2014-10-01 10:44:00.000', '2014-10-01 12:21:00.000'
INSERT INTO @table SELECT '2014-10-13 15:50:00.000', '2014-10-13 16:00:00.000'


;WITH addNR AS ( -- Add row numbers

    SELECT StartTime, EndTime, ROW_NUMBER() OVER (ORDER BY StartTime, EndTime) AS RowID
    FROM @table AS T

), createNewTable AS ( -- Recreate table according overlap time

    SELECT StartTime, EndTime, RowID 
    FROM addNR
    WHERE RowID = 1

    UNION ALL

    SELECT 
        CASE 
            WHEN a.StartTime <= AN.StartTime AND AN.StartTime <= a.EndTime THEN a.StartTime 
            ELSE AN.StartTime END AS StartTime, 
        CASE WHEN a.StartTime <= AN.EndTime AND AN.EndTime <= a.EndTime THEN a.EndTime 
            ELSE AN.EndTime END AS EndTime,
        AN.RowID 
    FROM addNR AS AN
    INNER JOIN createNewTable AS a
        ON a.RowID + 1 = AN.RowID

), getMinutes AS ( -- Get difference in minutes
    SELECT DATEDIFF(MINUTE,StartTime,MAX(EndTime)) AS diffMinutes
    FROM createNewTable
    GROUP BY StartTime
)
SELECT SUM(diffMinutes) AS Result
FROM getMinutes
SQL Query to get Percentage of Elapsed Time calculating total time and time to next row

SQL Query to get Percentage of Elapsed Time calculating total time and time to next row


By : Ajay Kabadi
Date : March 29 2020, 07:55 AM
this one helps. I have a MS SQL table like this (with variable count of rows returned): , Something like this should work:
code :
;WITH CTE_DIFF AS (
   SELECT [TimeStamp], [State], 
          DATEDIFF ( second , 
                    [TimeStamp] , 
                    LEAD([TimeStamp]) OVER (ORDER BY [TimeStamp])) AS time_diff 
   FROM mytable
), CTE_PERC AS (
   SELECT [TimeStamp], [State], time_diff ,
          SUM(time_diff) OVER (ORDER BY [TimeStamp]) * 1.0 / 
          SUM(time_diff) OVER () * 100 AS perc
   FROM CTE_DIFF
)
SELECT [TimeStamp], [State], 
       COALESCE(LAG(perc) OVER (ORDER BY [TimeStamp]), 0) AS PercentageStart,
       perc AS PercentageEnd
FROM CTE_PERC 
Laravel - Calculating total time for multiple time-entries

Laravel - Calculating total time for multiple time-entries


By : linko
Date : March 29 2020, 07:55 AM
hope this fix your issue I'm logging user time entries. My times migration looks like: , I corrected and checked my previous answer.
code :
$monthDurations = $user->times()
    ->whereYear('start_day', 2019)
    ->select(
        \DB::raw('TIME_FORMAT(SUM(TIME_TO_SEC(duration)), "%H:%i:%s") as `month_duration`'),
        \DB::raw('DATE_FORMAT(start_day, "%Y-%m") as `year_month`'),
        'category',
        'user_id'
    )
    ->groupBy(\DB::raw('DATE_FORMAT(start_day, "%Y-%m")'), 'category', 'user_id')
    ->get();
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