Pivot and Unpivot display

Posted on 2010-08-29
Last Modified: 2012-05-10
I have a table in Sql Server 2008 with these columns in it.
Month, Company, BillableQuantity, BilledAmount, Sales Tax

I need to display the data in this format
Company, Type, June, July, August....

I have attached a sample spreadsheet.  I can not figure out how to write the query to both pivot and unpivot this data.  Please help create this query.
Question by:raphil
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LVL 59

Expert Comment

by:Kevin Cross
ID: 33554352

Firstly, you would start with the unpivoting of the data.  You can use a derived table for this:

select [Month], Company, [Type], [Value]
from your_table_name
unpivot ([Value] for [Type] in ([Billable Quantity], [Billed Amount], [Sales Tax])) upvt

Then you would pivot this data by Month which should fit pivot's hard coded column list here as you know the values are January ... December.

select *
from (

select [Month], Company, [Type], [Value]
from your_table_name
unpivot ([Value] for [Type] in ([Billable Quantity], [Billed Amount], [Sales Tax])) upvt

) data
pivot (sum([Value]) for [Month] in ([January],...,[December])) pvt

Hope that helps.


Author Comment

ID: 33554385
The type of column "BilledAmount" conflicts with the type of other columns specified in the UNPIVOT list.The type of column "BilledAmount" conflicts with the type of other columns specified in the UNPIVOT list.
LVL 59

Accepted Solution

Kevin Cross earned 500 total points
ID: 33554455
Yes, sorry, that is because in most systems quantity (at least at the sellable level) will be whole numbers as customers tend to not buy partial parts *smile*; therefore, you will have to cast all the columns to same data type like decimal or money before doing the unpivot.

;with cte
   select [Month], Company
        , convert(decimal(14,4), [BillableQuantity]) AS BQ
        , convert(decimal(14,4), [BilledAmount] as BA
        , convert(decimal(14,4), [SalesTax]) as ST
   from your_table_name
), upvt
   select [Month], Company, [Type], [Value]
   from cte
   unpivot ([Value] for [Type] in ([BQ], [BA], [ST])) u
-- final select (pvt)
select *
from upvt
pivot (sum([Value]) for [Month] in ([January],...,[December])) p

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Author Closing Comment

ID: 33554508
Thanks a ton!  That worked like a breaze!

All points!
LVL 59

Expert Comment

by:Kevin Cross
ID: 33554509
Glad to have helped.
Best regards and happy coding,


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