Creating Table for Pivot Table

Question

Creating Table for Pivot Table

marySQL

SSC Journeyman

Points: 76
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June 18, 2013 at 10:33 am

#279285

Hello,
I need to create a pivot table, and I think I need a new column to get the pivot to work. Basically, what I have is data with customer#, customername and dist. Each customer can have more than 1 distributor, and I want my data to be arranged like: customer#, customername, dist1, dist2, dist3, etc (as many as they have).
I think I need to add a number column that will count each dist for each customer. But how do I do this?
Thanks!
Mary

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Lowell SSC Guru Points: 323504 More actions · Answer 1

if you know there is a maximum number of distributores, it's pretty easy; for example, this would assume a max of five distributora records:

WITH CTE AS (

SELECT customer#, customername,

ROW_NUMBER() OVER(PARTITION BY customer# ORDER BY dist) AS rn

FROM MyTable)

SELECT customer#,

MAX(CASE WHEN rn=1 THEN dist END) AS dist1,

MAX(CASE WHEN rn=2 THEN dist END) AS dist2,

MAX(CASE WHEN rn=3 THEN dist END) AS dist3,

MAX(CASE WHEN rn=4 THEN dist END) AS dist4,

MAX(CASE WHEN rn=5 THEN dist END) AS dist5

FROM CTE

GROUP BY customer#

Lowell

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marySQL SSC Journeyman Points: 76 More actions · Answer 2

Thank you. Luckily for me it turns out the highest # of distributors used is 17, so I can work with this.

Thanks for your help!!

Mary

Luis Cazares SSC Guru Points: 183698 More actions · Answer 3

For more information, I recommend you to read the following articles that would even allow you to return a variable number of columns.

Cross Tabs and Pivots, Part 1 – Converting Rows to Columns[/url]

Cross Tabs and Pivots, Part 2 - Dynamic Cross Tabs[/url]

Luis C.
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marySQL SSC Journeyman Points: 76 More actions · Answer 4

marySQL

SSC Journeyman

Points: 76

June 18, 2013 at 4:15 pm

#1625246

Thanks!