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My SQL Tutorials - Group By

Grouped Queries (GROUP BY Clause):     The GROUP BY Clause is called a groupe query because it groups the data from its source tables and provides a sigle sumary row for each group. Here is an example of the GROUP BY Clause...  

Select Column1, Column2, Column3
From TableName
Where ColumnName in ("Value1", "Value2", "Value3")
Group By Column4 ;

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