Displaying empty rows in a report

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Displaying empty rows in a report

Author

Topic

L_i_L_i
Starting Member

6 Posts

Posted - 2013-10-20 : 12:36:16

Hi!

I have a table that looks like this:

[Date] [Time interval] [Number of calls] [PilotID]

20130303 01:00-02:00 34 0100
20130303 01:00-02:00 23 0110
20130303 03:00-04:00 12 0100

etc....

My problem is that there are time intervals with no calls. But I want to show a report with 24 rows for time interval for every day. So if there are no calls, I want to show 0. PilotID and Date will be parameters. PilotID is a parameter with multiple values, so user can pick startdate and enddate and pilot(es). If u pick more than one pilot, the sum of calls will be shown (still 24 rows for a day). I don't know if those empty rows should be made in SQL, I tried Left Outer Join, but I couldn't get it right because of parameter used for PilotID. Any ideas how to deal with this?

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2013-10-20 : 13:28:55

[code]
SELECT m.*,COALESCE(n.[Number of calls],0) AS [Number of calls]
FROM
(
SELECT [Date],[Time interval],PilotID
FROM (SELECT DISTINCT [Time interval] FROM Table)t
CROSS JOIN (SELECT DISTINCT [Date] FROM Table WHERE [Date] BETWEEN @StartDate AND @EndDate)d
CROSS JOIN (SELECT DISTINCT PilotID FROM Table WHERE PilotID IN (Your list values...))p
)m
LEFT JOIN Table n
ON n.PilotID = m.PilotID
AND n.[Date] = m.[Date]
AND n.[Time interval] = m.[Time interval]
[/code]

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/
https://www.facebook.com/VmBlogs

L_i_L_i
Starting Member

6 Posts

Posted - 2013-10-22 : 16:20:16

Thank you very much, you made my day! :)

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2013-10-23 : 02:09:56

welcome

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/
https://www.facebook.com/VmBlogs

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