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.
and. unfortunately SQL does not permit a select count(distinct). You have duplicate records if the number of records returned by the second query is less than the number of records returned by the first. Unfortunately there is no way in SQL to delete one of these duplicates without deleting all of them.They are identical after all, so there is no SQL query that you could put together which could distinguish between them. What you can do is to copy all the distinct records into a new table:nfortunately there is no way in SQL to delete one of these duplicates without deleting all of them. They are identical after all, so there is no SQL query that you could put together which could distinguish between them.