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.
Problem of duplicates in database arise when you don't have a primary key or unique key on database and that's why its recommended to have a key column in table. Anyway its easy to find duplicate records in table by using group by clause of ANSI SQL.n order to find duplicate records in database table you need to confirm definition of duplicates, for example in below contact table which is suppose to store name and phone number of contact, a record is considered to be duplicate if both name and phone number is same but unique if either of them varies.