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To find the total number of duplicate rows, embed the COUNTIFS function instead of COUNTIF in the above formula, and specify all of the columns you want to check for duplicates. For example, to count duplicate rows based on columns A and B, enter the following formula in your Excel sheet:
Often duplicate PKs are noticed when you attempt to create a unique index, which will abort if duplicate keys are found. This message is: If you are using SQL Server 2000 or SQL Server 2005, you may receive the following error message: This article discusses how to locate and remove duplicate primary keys from a table.However, you should closely examine the process which allowed the duplicates to happen in order to prevent a recurrence.he last column in this result is the number of duplicates for the particular PK value. If there are only a few sets of duplicate PK values, the best procedure is to delete these manually on an individual basis. For example: The rowcount value should be n-1 the number of duplicates for a given key value.