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PO
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15837969
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2013-04-05T15:36:35.053
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2013-04-05T21:31:54.443
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2013-04-05T21:31:54.443
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text
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Here is a Northwind example based on the Orders table. There are duplicates based on the (EmployeeID , ShipCity , ShipCountry) columns. If you only execute the code between these 2 lines: <pre><code>/* Run everything below this line to show crux of the fix */ /* Run everything above this line to show crux of the fix */ </code></pre> you'll see how it works. Basically: (1) You run a GROUP BY on the 3 columns of interest. (derived1Duplicates) (2) Then you join back to the table using these 3 columns. (on ords.EmployeeID = derived1Duplicates.EmployeeID and ords.ShipCity = derived1Duplicates.ShipCity and ords.ShipCountry = derived1Duplicates.ShipCountry) (3) Then for each group, you tag them with Cardinal numbers (1,2,3,4,etc) (using ROW_NUMBER()) (4) Then you keep the row in each group that has the cardinal number of "1". (where derived2DuplicatedEliminated.RowIDByGroupBy = 1) <pre><code> Use Northwind GO declare @DestinationVariableTable table ( NotNeededButForFunRowIDByGroupBy int not null , NotNeededButForFunDuplicateCount int not null , [OrderID] [int] NOT NULL, [CustomerID] [nchar](5) NULL, [EmployeeID] [int] NULL, [OrderDate] [datetime] NULL, [RequiredDate] [datetime] NULL, [ShippedDate] [datetime] NULL, [ShipVia] [int] NULL, [Freight] [money] NULL, [ShipName] [nvarchar](40) NULL, [ShipAddress] [nvarchar](60) NULL, [ShipCity] [nvarchar](15) NULL, [ShipRegion] [nvarchar](15) NULL, [ShipPostalCode] [nvarchar](10) NULL, [ShipCountry] [nvarchar](15) NULL ) INSERT INTO @DestinationVariableTable (NotNeededButForFunRowIDByGroupBy , NotNeededButForFunDuplicateCount , OrderID,CustomerID,EmployeeID,OrderDate,RequiredDate,ShippedDate,ShipVia,Freight,ShipName,ShipAddress,ShipCity,ShipRegion,ShipPostalCode,ShipCountry ) Select RowIDByGroupBy , MyDuplicateCount , OrderID,CustomerID,EmployeeID,OrderDate,RequiredDate,ShippedDate,ShipVia,Freight,ShipName,ShipAddress,ShipCity,ShipRegion,ShipPostalCode,ShipCountry From ( /* Run everything below this line to show crux of the fix */ Select RowIDByGroupBy = ROW_NUMBER() OVER(PARTITION BY ords.EmployeeID , ords.ShipCity , ords.ShipCountry ORDER BY ords.OrderID ) , derived1Duplicates.MyDuplicateCount , ords.* from [dbo].[Orders] ords join ( select EmployeeID , ShipCity , ShipCountry , COUNT(*) as MyDuplicateCount from [dbo].[Orders] GROUP BY EmployeeID , ShipCity , ShipCountry /*HAVING COUNT(*) > 1*/ ) as derived1Duplicates on ords.EmployeeID = derived1Duplicates.EmployeeID and ords.ShipCity = derived1Duplicates.ShipCity and ords.ShipCountry = derived1Duplicates.ShipCountry /* Run everything above this line to show crux of the fix */ ) as derived2DuplicatedEliminated where derived2DuplicatedEliminated.RowIDByGroupBy = 1 select * from @DestinationVariableTable </code></pre> emphasized text*emphasized text*emphasized text
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1. POCopy Distinct Records Based on 3 Cols
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1. COMy first answer wasn't correct. But this one is (IMHO).
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Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.