sql - Conditional sum in Group By query MSSQL

Question

I have a table OrderDetails with the following schema:

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|  OrderId  |  CopyCost  |  FullPrice  |  Price  |  PriceType  |
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|  16       |  50        |  100        |  50     |  CopyCost   |
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|  16       |  50        |  100        |  100    |  FullPrice  |
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|  16       |  50        |  100        |  50     |  CopyCost   |
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|  16       |  50        |  100        |  50     |  CopyCost   |
----------------------------------------------------------------

I need a query that will surmise the above table into a new table with the following schema:

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|  OrderId  |  ItemCount  |  TotalCopyCost  |  TotalFullPrice  |
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|  16       |  4          |  150            |  100             |
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Currently I am using a Group By on the Order.Id to the the item count. But I do not know how to conditionally surmise the CopyCost and FullPrice values.

Any help would be much appreciated.

Regards Freddie

Answer 1

Try

SELECT OrderId, 
       COUNT(*) ItemCount,
       SUM(CASE WHEN PriceType = 'CopyCost' THEN Price ELSE 0 END) TotalCopyCost,
       SUM(CASE WHEN PriceType = 'FullPrice' THEN Price ELSE 0 END) TotalFullPrice
  FROM OrderDetails
 GROUP BY OrderId

SQLFiddle