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Finding Duplicate Records. An even more common need is to find duplicates in a table. Perhaps you want to know how many duplicate names there are in the table so you can begin to clean up your data. To do so, create a normal Access Select Query containing the field with duplicate information. The change the query to be an Aggregate Query by clicking the Totals icon in the ribbon. Add one more field, any will do, and then set that field to be Count.. This will give you a count of records that match the name.
The 2010 entry, Use formulas to find multi-column duplicates in Excel, combines IF() and COUNTIF() to find duplicate records within the same data set. However, using the COUNTIFS() function, you can also compare two data sets for duplicate records.hen the rows aren't duplicates, the function returns 0. You can use this column to filter the data set, as follows: 1  Click the Data tab and then click Filter in the Sort & Filter group to display dropdowns for each column. 2  In Excel 2003, choose Filter from the Data menu, and then select AutoFilter.