Group By and Having The GROUP BY statement groups rows that have the same values into summary rows, like "find the number of customers in each dept". The GROUP BY statement is must be used with aggregate functions (COUNT, MAX, MIN, SUM, AVG) to group the result-set by one or more columns. GROUP BY Syntax
Group By and Having The GROUP BY statement groups rows that have the same values into summary rows, like "find the number of customers in each dept". The GROUP BY statement is must be used with aggregate functions (COUNT, MAX, MIN, SUM, AVG) to group the result-set by one or more columns. GROUP BY Syntax