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sql query that displays duplicates in an alias

Posted on 2014-04-23
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Last Modified: 2014-04-25
I have a database that records when computers performs a count of specific activities.  The same computer might report several times in a single day.  To simplify, we'll say the data is like this:

computer name, date, count
comp1, mon, 3
comp1, mon, 6
comp2, mon, 4
comp3, mon, 1
comp1, tue, 6
comp3, tue, 2
comp2, wed, 12

What I want is for the data to be displayed in a week grid format, like this:

computer name, mon, tue, wed, thu, fri
comp1, 9, 6, 0, 0, 0
comp2, 4, 0, 12, 0, 0
comp3, 1, 2, 0, 0, 0

I'm not quite sure how to approach this, if it's even possible.  Any help is appreciated!
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Question by:bigbigpig
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6 Comments
 
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Expert Comment

by:Sharath
ID: 40019346
try this.
SELECT *
  FROM test
 PIVOT (SUM([Count]) FOR [Date] IN ([mon],[tue],[wed],[thu],[fri],[sat],[sun])) AS p

Open in new window

http://sqlfiddle.com/#!3/bbb3d/1
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Author Comment

by:bigbigpig
ID: 40020510
That's pretty awesome thanks.  In my attempt to simplify I left out something which now seems important.  The table has an auto-increment primary key for record number.  So it's not adding the values as it should, probably because the record_number value is different.
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LVL 40

Expert Comment

by:Sharath
ID: 40020808
Can you post your table definition, sample data and expected result?
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LVL 10

Author Comment

by:bigbigpig
ID: 40021724
Same as before, just with the record_number in front.

record_number,computer name, date, count
1,comp1, mon, 3
2,comp1, mon, 6
3,comp2, mon, 4
4,comp3, mon, 1
5,comp1, tue, 6
6,comp3, tue, 2
7,comp2, wed, 12

Expected results would be the same as your sqlfiddle query you linked to above.
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Accepted Solution

by:
Scott Pletcher earned 500 total points
ID: 40023070
SELECT
    [computer name],
    SUM(CASE WHEN date = 'Mon' THEN [count] ELSE 0 END) AS [Mon],
    SUM(CASE WHEN date = 'Tue' THEN [count] ELSE 0 END) AS [Tue],
    --...
    SUM(CASE WHEN date = 'Sat' THEN [count] ELSE 0 END) AS [Sat],
    SUM(CASE WHEN date = 'Sun' THEN [count] ELSE 0 END) AS [Sun]
GROUP BY
    [computer name]
ORDER BY
    [computer name]
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Author Closing Comment

by:bigbigpig
ID: 40023537
Perfect - thanks!!
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