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How to transform vertical data to horizontal format

Posted on 2008-10-19
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Last Modified: 2010-04-21
I am trying transform vertical data into a single record horizontal layout.  I have tried a number of ways including pivot, crosstabs, etc.   Can anyone provide assstance?

Table1
VendorID      PymtVendor
COM35         COM35P
COM35         COM35Q
COM35         COM35S

Desired Results

VendorID          PymtVendor1         PymtVendor2          PymtVendor3
COM35              COM35P                 COM35Q                 COM35S

Please note there could be up to 10 Payment vendors per vendor ID.

Thank you in advance.

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Question by:asimillc
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4 Comments
 
LVL 39

Expert Comment

by:BrandonGalderisi
ID: 22752842
Any particular way you want them to appear?  As in, order?

This will sort by name so the first alphabetical will be 1, then 2..... pymtvendor .
;with paymentvendors as (select vendorid,pymtvendor,row_number() over (partition by vendorid order by pymtvendor) rn from table1)
select pv1.vendorid, pv1.pymtvendor, pv2.pymtvendor, pv3.pymtvendor, pv4.pymtvendor, pv5.pymtvendor, pv6.pymtvendor, pv7.pymtvendor, pv8.pymtvendor, pv9.pymtvendor, pv10.pymtvendor
from paymentvendors pv1
left outer join paymentvendors pv2 on pv1.vendorid = pv2.vendorid and pv2.rn=2
left outer join paymentvendors pv3 on pv1.vendorid = pv3.vendorid and pv3.rn=3
left outer join paymentvendors pv4 on pv1.vendorid = pv4.vendorid and pv4.rn=4
left outer join paymentvendors pv5 on pv1.vendorid = pv5.vendorid and pv5.rn=5
left outer join paymentvendors pv6 on pv1.vendorid = pv6.vendorid and pv6.rn=6
left outer join paymentvendors pv7 on pv1.vendorid = pv7.vendorid and pv7.rn=7
left outer join paymentvendors pv8 on pv1.vendorid = pv8.vendorid and pv8.rn=8
left outer join paymentvendors pv9 on pv1.vendorid = pv9.vendorid and pv9.rn=9
left outer join paymentvendors pv10 on pv1.vendorid = pv10.vendorid and pv10.rn=10
 
where pv1.rn=1

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Author Comment

by:asimillc
ID: 22752870
All data is contained within one table.  Does this solution join to the same table ?
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LVL 39

Accepted Solution

by:
BrandonGalderisi earned 500 total points
ID: 22752875
Yes.  The solution above uses a common table expression to express a 1-10 value for rows and then left joins to the cte many times over to "pivot" the data.
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Author Closing Comment

by:asimillc
ID: 31507613
Thanks for the quick help!
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