Calculate total time excluding overlapped time & breaks in MySQL -

-

There is a list of start time and end time from a selected query, overlapping time and the total time address except for any break Will have to be installed. 

  Start time expiration date 2014-10-01 10: 30: 00.000 2014-10-01 12: 00: 00,000 - 90 minutes 2014-10-01 10: 40: 00.000 2014-10 -01 12: 00: 00.000 --0 because it overlaps with previous 2014-10-01 10: 42: 00.000 2014-10-01 12: 20: 00.000 - 20 minutes except overlap time 2014-10-01 10: 40: 00.000 2014-10-01 13: 00: 00.000 - 40 minutes 2014-10-01 10: 44: 00.000 2014-10-01 12:21: 00.000 - 0 Previous times this time frame 2014-10-13 15: 50: 00.000 2014-10-13 16: 00: 00.000 - 10 min

There are so many covers in this case it should be 160 minutes.

I have some ideas with lots of loops and if there is only one available in search of some simple solutions.

This problem is the interval and the type of islands is a way to deal with it here

< Preclass = "lang-sql prettyprint-override"> SELECT SUM (minutes) from the total (SELECT TIMESTAMPDIFF (MINUTE, MIN (start time), MAX (end time)) minutes (SELECT start, end time, @g : = If (Table 1 cross join (SELECT @g: = 0, @ E: =) (initial time and expiry time or end time & lt; @e, @ g, @ g + 1) NULL) I start time, end time) by G group G) q

Output: 

 | Total. ------- | | 160 |

Here is a demo


Comments

Post a Comment

Popular posts from this blog

apache - 504 Gateway Time-out The server didn't respond in time. How to fix it? -

-
Using a form submission on an embedded iframe , the customer downloads a compressed log file Requested. The request was sent to the server, which is the compressed log files, perform some database operations and returns a compressed file. After just 2 minutes, 504 gateway time-out server did not respond timely message on browser net panel How to fix this error? The log files were taking a long time to compress, and timeout was set to 2min The error was fixed by extending the file file: # # timeout: The number of seconds before getting the time out. # # # Timeout 120 timeout 600
Read more

c# - .net WebSocket: CloseOutputAsync vs CloseAsync -

-
We have a working ASP.NET Web API REST service, which is one of the methods of our controller, HTTPTTEX. .) Socket handler code looks something like this ... Public async task socket handler (AspNetWebSocketContext context) {_webSocket = context.WebSocket; ... while (! Cts.IsCancellationRequested) {WebSocketReceiveResult Results = _webSocket.ReceiveAsync (Input Segment, cts.Token) .Result; WebSocketsStateCollusocketState = _webSocket.State; If (result.MessageType == WebSocketMessageType.Close || currentSocketState == WebSocketState.CloseReceived) {// What should I use. CloseAysnc () or. CloseOutputAsync ()? _webSocket.CloseOutputAsync (WebSocketCloseStatus.NormalClosure, "Client Requested", cts.Token). Wait (); } If (currentSocketState == WebSocketState.Open) {...}}} .What is the difference between .CooseAsync () and CloseOutputAysnc ()? I tried both of them and they both seemed to work fine but some difference should be the same they both describe very similar to...
Read more

c++ - How to properly scale qgroupbox title with stylesheet for high resolution display? -

-
I am trying to apply a stylesheet for QGroupBox (QT4.8), which works on the normal screen ( 96 dpi) high resolution screen (Yoga 2 Pro, 3200x1800, 275 dpi, windows 8.1). The following style looks good on the 275 dpi screen, but the top margins on a regular 96 dpi screen are far too big. QGroupBox {border: 1px solid red; Range radius: 7px; Margin-top: 12x; } QGroupBox :: Title {subcontrol-origin: margin; Subcontrol-position: left above; Padding-left: 10px; Padding-right: 10px; } Changing the top-margin has an effect, but I did not get a proper setting which works on both screens. If I shorten the value, the content of the group box overlaps with the title on 275 dpi screen. I was also playing with units "East", "PX", "MX", "PT". Reading the document I would have guessed, "2 X" was the correct solution, which should be scaled with different screen resolutions. Without the stylesheet, the groupbox works well on both screens. ...
Read more