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Finding total number of rows in a table. We can get the number of rows or records present in a table by using mysql_num_rows() function. This function is to be used along with mysql select query. We can add condition by using mysql where clause to the select query and get the conditional rows.
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.