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Sort query with nulls at the end

Posted on 2014-07-21
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Last Modified: 2014-07-22
I have a query that sorts records ascending by date.  However, some of the date fields can be null, and I need these to come at the end of the list (currently they come at the start).

Here is my query:
SELECT tblClients.[Client ID], tblJobs.[Short description], Sum(tblJobVolLink.HoursWorked) AS VolHrsWorked, tblJobs.[Actual supervisor hours], tblJobs.[Date completed]
FROM (tblClients INNER JOIN tblJobs ON tblClients.[Client ID] = tblJobs.[Client ID]) LEFT JOIN tblJobVolLink ON tblJobs.[Job ID] = tblJobVolLink.[Job ID]
GROUP BY tblClients.[Client ID], tblJobs.[Short description], tblJobs.[Actual supervisor hours], tblJobs.[Date completed]
ORDER BY tblJobs.[Date completed];

I cannot figure out how I can do this.

Regards

Richard
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Comment
Question by:rltomalin
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6 Comments
 
LVL 85
ID: 40208951
Have you tried a Descending sort:

SELECT tblClients.[Client ID], tblJobs.[Short description], Sum(tblJobVolLink.HoursWorked) AS VolHrsWorked, tblJobs.[Actual supervisor hours], tblJobs.[Date completed]
FROM (tblClients INNER JOIN tblJobs ON tblClients.[Client ID] = tblJobs.[Client ID]) LEFT JOIN tblJobVolLink ON tblJobs.[Job ID] = tblJobVolLink.[Job ID]
GROUP BY tblClients.[Client ID], tblJobs.[Short description], tblJobs.[Actual supervisor hours], tblJobs.[Date completed]
ORDER BY tblJobs.[Date completed] DESC
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LVL 61

Expert Comment

by:mbizup
ID: 40208953
Create a field to handle the Sort Order, and assign nulls a large value, using NZ:


SELECT tblClients.[Client ID], tblJobs.[Short description], Sum(tblJobVolLink.HoursWorked) AS VolHrsWorked, tblJobs.[Actual supervisor hours], tblJobs.[Date completed], NZ(tblJobs.[Date completed]
, #1/1/2300#) AS DateCompletedOrderBy
FROM (tblClients INNER JOIN tblJobs ON tblClients.[Client ID] = tblJobs.[Client ID]) LEFT JOIN tblJobVolLink ON tblJobs.[Job ID] = tblJobVolLink.[Job ID]
GROUP BY tblClients.[Client ID], tblJobs.[Short description], tblJobs.[Actual supervisor hours], tblJobs.[Date completed]
ORDER BY  NZ(tblJobs.[Date completed]
, #1/1/2300#);

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Author Comment

by:rltomalin
ID: 40209144
Scott - that would just reverse the sort order - the dates would be sorted descending - which I don't want.

mbizup
I tried your solution but it didn't seem to work.  Is there a problem with the date format?
I have attached the results with your code (+ the option omitting the #) but that doesn't work either.

I notice that when I show the sort field it is left aligned, whereas the actual date field is right aligned.  Is this a clue to the problem?

Regards
Date-sort-code.docx
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LVL 61

Accepted Solution

by:
mbizup earned 2000 total points
ID: 40209259
Try this - using CDate on the order by field:

SELECT tblClients.[Client ID], tblJobs.[Short description], Sum(tblJobVolLink.HoursWorked) AS VolHrsWorked, tblJobs.[Actual supervisor hours], tblJobs.[Date completed], CDate(NZ(tblJobs.[Date completed]
, #1/1/2300#)) AS DateCompletedOrderBy
FROM (tblClients INNER JOIN tblJobs ON tblClients.[Client ID] = tblJobs.[Client ID]) LEFT JOIN tblJobVolLink ON tblJobs.[Job ID] = tblJobVolLink.[Job ID]
GROUP BY tblClients.[Client ID], tblJobs.[Short description], tblJobs.[Actual supervisor hours], tblJobs.[Date completed]
ORDER BY  CDate(NZ(tblJobs.[Date completed]
, #1/1/2300#));

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Or alternatively this -- formatting a date string as yyyymmdd:


SELECT tblClients.[Client ID], tblJobs.[Short description], Sum(tblJobVolLink.HoursWorked) AS VolHrsWorked, tblJobs.[Actual supervisor hours], tblJobs.[Date completed], Format(NZ(tblJobs.[Date completed]
, #1/1/2300#),'yyyymmdd')  AS DateCompletedOrderBy
FROM (tblClients INNER JOIN tblJobs ON tblClients.[Client ID] = tblJobs.[Client ID]) LEFT JOIN tblJobVolLink ON tblJobs.[Job ID] = tblJobVolLink.[Job ID]
GROUP BY tblClients.[Client ID], tblJobs.[Short description], tblJobs.[Actual supervisor hours], tblJobs.[Date completed]
ORDER BY  Format(NZ(tblJobs.[Date completed]
, #1/1/2300#), 'yyyymmdd');

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Author Comment

by:rltomalin
ID: 40209349
Hi mbizup
Home now.  Will try in the morning.
Thanks
Richard
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Author Closing Comment

by:rltomalin
ID: 40211159
Hi mbizup

Excellent.  Does just what it says on the tin!!

Regards

Richard
0

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