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Learn how to group data in SQL using the "Group BY" clause. In this tutorial, you will see how helpful SQL can be for effective data manipulation. In SQL, data grouping is performed using the GROUP BY clause. To do the grouping properly, you often need to apply aggregate functions to the column(s) within the table within the "group BY statement" clause to do the data grouping properly. You can group individual data by one or more table columns using the 'Group BY' clause.