Transpose/Pivot Help

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Transpose/Pivot Help

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ajames 36824

Posted Wednesday, February 20, 2013 2:46 PM

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Hi. I have a table & I need to transpose/pivot some of the columns into rows. The column that needs to be pivoted is related to another in that the Response column contains responses to the questions in the QuestionID column. I need to transpose/pivot the QuestionID column but keep the corresponding responses in their proper place. Below is an example that I did by hand. I searched the forum and there were several examples similar to what I'm looking for, but not quite close enough.

Current format
ClientID DOV Form QuestionID Response
7 3/1/2012 Audit Alcohol1-001 0
8 8/9/2011 Audit Alcohol1-001 0
8 1/11/2012 Audit Alcohol1-001 0
9 8/24/2011 Audit Alcohol1-002 0
9 2/18/2012 Audit Alcohol1-002 1

Desired format
ClientID DOV Form Alcohol1-001 Alcohol1-002
7 3/1/2012 Audit 0
8 8/9/2011 Audit 0
8 1/11/2012 Audit 0
9 8/24/2011 Audit 0
9 2/18/2012 Audit 1

Is there any way to do this? Any help would be greatly appreciated.

Post #1422316

dwain.c

Posted Wednesday, February 20, 2013 6:24 PM

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In the future, my suggestion is that you try to help your helpers a bit by providing DDL and consumable sample data like this:

DECLARE @Imbibing TABLE
    (ClientID INT, DOV DATE, Form VARCHAR(10), QuestionID VARCHAR(20), Response INT)

INSERT INTO @Imbibing 
SELECT 7, '3/1/2012','Audit','Alcohol1-001',0 
UNION ALL SELECT 8, '8/9/2011','Audit','Alcohol1-001',0 
UNION ALL SELECT 8, '1/11/2012','Audit','Alcohol1-001',0 
UNION ALL SELECT 9, '8/24/2011','Audit','Alcohol1-002',0 
UNION ALL SELECT 9, '2/18/2012','Audit','Alcohol1-002',1

Remember that we're all volunteers here so this kindly helps us to respond quicker, better and with tested results.

Now onto a proposed solution:

SELECT ClientID, DOV, Form
    ,[Alcohol1-001]=CASE QuestionID WHEN 'Alcohol1-001' THEN 1 ELSE 0 END 
    ,[Alcohol1-002]=CASE QuestionID WHEN 'Alcohol1-002' THEN 1 ELSE 0 END 
FROM @Imbibing

Mind you this is only a guess, because in your "desired results" you show 5 column headers but only 4 data columns. And one of the Alcohol1-002 results rows doesn't match what I'm thinking you probably want.

No loops! No CURSORs! No RBAR! Hoo-uh!

INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?

Need to UNPIVOT? Why not CROSS APPLY VALUES instead?
Since random numbers are too important to be left to chance, let's generate some!
Are you too recursively challenged?
Splitting strings based on patterns can be fast!

Post #1422375

ajames 36824

Posted Wednesday, February 20, 2013 7:38 PM

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Allow me to try again. The original file comes from an excel spreadsheet that I pull into SPSS & then export to a table in SQL. Then I wanted to write query to to pivot the necessary columns. Attached is the original data in excel & a spreadsheet with the 1st few cases pivoted.

Post Attachments

Test data, 2013.02.20.xlsx (12 views, 9.37 KB)

Test data - rev, 2013.02.20.xlsx (5 views, 7.85 KB)

Post #1422377

dwain.c

Posted Wednesday, February 20, 2013 8:15 PM

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ajames 36824 (2/20/2013)

I think you'll find many people (including myself) will be reluctant to open Excel spreadsheet attachments due to the potential for viruses.

You should post consumable sample data as I did and your expected results (perhaps as an attached bitmap).

Post #1422384

ajames 36824

Posted Thursday, February 21, 2013 12:45 PM

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Okay, I did this both ways in the hopes that one would be correct. I have attached bitmap file & I created a query using the instructions in the "Forum Etiquette" to produce the data below

SELECT "7","2012-03-01","Audit","Alcohol1-001","0" UNION ALL
SELECT "7","2012-03-01","Audit","Alcohol1-001","0" UNION ALL
SELECT "8","2011-08-09","Audit","Alcohol1-001","0" UNION ALL
SELECT "8","2011-08-09","Audit","Alcohol2-002","0" UNION ALL
SELECT "8","2012-01-11","Audit","Alcohol1-001","0" UNION ALL
SELECT "8","2012-01-11","Audit","Alcohol2-002","0" UNION ALL
SELECT "9","2011-08-24","Audit","Alcohol1-001","0" UNION ALL
SELECT "9","2011-08-24","Audit","Alcohol2-002","0" UNION ALL
SELECT "9","2012-02-18","Audit","Alcohol1-001","1" UNION ALL
SELECT "9","2012-02-18","Audit","Alcohol2-002","0" UNION ALL
SELECT "12","2012-02-14","Audit","Alcohol1-001","0" UNION ALL
SELECT "12","2012-02-14","Audit","Alcohol2-002","0" UNION ALL
SELECT "13","2011-09-28","Audit","Alcohol1-001","0" UNION ALL
SELECT "43","2011-11-01","Audit","Alcohol1-001","0" UNION ALL
SELECT "44","2011-11-21","Audit","Alcohol1-001","0" UNION ALL
SELECT "157","2012-02-29","Audit","Alcohol1-001","0" UNION ALL
SELECT "157","2012-06-20","Audit","Alcohol1-001","0" UNION ALL
SELECT "158","2012-03-21","Audit","Alcohol1-001","0" UNION ALL
SELECT "158","2012-07-11","Audit","Alcohol1-001","1" UNION ALL
SELECT "160","2012-06-19","Audit","Alcohol1-001","0" UNION ALL
SELECT "160","2012-11-09","Audit","Alcohol1-001","0" UNION ALL
SELECT "164","2012-07-17","Audit","Alcohol1-001","0" UNION ALL
SELECT "174","2012-06-06","Audit","Alcohol1-001","1" UNION ALL
SELECT "178","2012-07-17","Audit","Alcohol1-001","0" UNION ALL

Post Attachments

Pivot Data.bmp (3 views, 464.12 KB)

Post #1422756

dwain.c

Posted Thursday, February 21, 2013 5:31 PM

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You're definitely on the right track to give us what we need to help you and reading the forum etiquette article was a smart thing to do.

You didn't provide the DDL I asked for but I found that the DDL I used was good enough, so after changing the double quotes to single quotes and removing the last UNION ALL, this will run for me:

DECLARE @Imbibing TABLE
    (ClientID INT, DOV DATE, Form VARCHAR(10), QuestionID VARCHAR(20), Response INT)

INSERT INTO @Imbibing
SELECT '7','2012-03-01','Audit','Alcohol1-001','0' UNION ALL
SELECT '7','2012-03-01','Audit','Alcohol1-001','0' UNION ALL
SELECT '8','2011-08-09','Audit','Alcohol1-001','0' UNION ALL
SELECT '8','2011-08-09','Audit','Alcohol2-002','0' UNION ALL
SELECT '8','2012-01-11','Audit','Alcohol1-001','0' UNION ALL
SELECT '8','2012-01-11','Audit','Alcohol2-002','0' UNION ALL
SELECT '9','2011-08-24','Audit','Alcohol1-001','0' UNION ALL
SELECT '9','2011-08-24','Audit','Alcohol2-002','0' UNION ALL
SELECT '9','2012-02-18','Audit','Alcohol1-001','1' UNION ALL
SELECT '9','2012-02-18','Audit','Alcohol2-002','0' UNION ALL
SELECT '12','2012-02-14','Audit','Alcohol1-001','0' UNION ALL
SELECT '12','2012-02-14','Audit','Alcohol2-002','0' UNION ALL
SELECT '13','2011-09-28','Audit','Alcohol1-001','0' UNION ALL
SELECT '43','2011-11-01','Audit','Alcohol1-001','0' UNION ALL
SELECT '44','2011-11-21','Audit','Alcohol1-001','0' UNION ALL
SELECT '157','2012-02-29','Audit','Alcohol1-001','0' UNION ALL
SELECT '157','2012-06-20','Audit','Alcohol1-001','0' UNION ALL
SELECT '158','2012-03-21','Audit','Alcohol1-001','0' UNION ALL
SELECT '158','2012-07-11','Audit','Alcohol1-001','1' UNION ALL
SELECT '160','2012-06-19','Audit','Alcohol1-001','0' UNION ALL
SELECT '160','2012-11-09','Audit','Alcohol1-001','0' UNION ALL
SELECT '164','2012-07-17','Audit','Alcohol1-001','0' UNION ALL
SELECT '174','2012-06-06','Audit','Alcohol1-001','1' UNION ALL
SELECT '178','2012-07-17','Audit','Alcohol1-001','0' 

SELECT * FROM @Imbibing

Now here is the issue. The BMP you provided shows the SELECT statements above that I've inserted into the temporary table. What it should show is the exact expected results based on the sample data you provided.

Post #1422830

ajames 36824

Posted Friday, February 22, 2013 6:42 AM

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Thanks for cleaning that up. And that's right, you did say that bmp should be the desired results. Here you go.

Post Attachments

Test data - rev.bmp (5 views, 464.12 KB)

Post #1423025

dwain.c

Posted Friday, February 22, 2013 9:10 AM

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Clarity is a beautiful thing.

SELECT ClientID, DOV, Form
    ,[Alcohol1-001]=MAX(CASE QuestionID WHEN 'Alcohol1-001' THEN CAST(Response AS VARCHAR(3)) ELSE '' END )
    ,[Alcohol1-002]=MAX(CASE QuestionID WHEN 'Alcohol2-002' THEN CAST(Response AS VARCHAR(3)) ELSE '' END )
FROM @Imbibing 
GROUP BY ClientID, DOV, Form

Post #1423117

ajames 36824

Posted Friday, February 22, 2013 12:04 PM

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You ROCK!

Post #1423206

Jeff Moden

Posted Friday, February 22, 2013 12:18 PM

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ajames 36824 (2/22/2013)

You ROCK!

Do you understand how and why it works?

--Jeff Moden

"RBAR is pronounced "ree-bar" and is a "Modenism" for "Row-By-Agonizing-Row".

First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column."

For better, quicker answers on T-SQL questions, click on the following...
http://www.sqlservercentral.com/articles/Best+Practices/61537/

For better answers on performance questions, click on the following...
http://www.sqlservercentral.com/articles/SQLServerCentral/66909/

Post #1423212

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