In this case, identify the example duplicate, "Alan." Make sure that the records you are trying to delete are actually duplicates by entering the SQL below. " In the instance of a column named "Names," you would replace "column_name" with Names. If you were trying to identify the duplicate by a different column, for example the age of Alan rather than his name, you would enter "Ages" in the place of "column_name" and so on.   select column_name, count(column_name)  from table  group by column_name having count (column_name) > 1;

How would you rephrase that briefly using Vietnamese?
Nhận dạng dữ liệu trùng lặp. Tìm trong cột có tên là "Names". Tìm trong cột khác.