ON THIS PAGE: You will find information about how many people are diagnosed with a brain tumor each year and some general survival information. Remember, survival rates depend on several factors. To see other pages, use the menu on the side of your screen.
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.
In the code by saying, we are asking SQL Server to keep all the records with Rank 1, which are not duplicates, and delete any other record. After executing this query in SQL Server Management Studio, you will end up with no duplicates in your table.To confirm that just run a simple query against your table.f you look at the data, there are considerable duplicates in it. John and Mark's names got repeated many times in the data. Now, let us write a query that uses the ROW NUMBER function and gives any duplicate values the rank of 2, 3 and so on.