suresh In SQL, the GROUP BY and HAVING clauses serve distinct purposes. The GROUP BY clause is used to group rows that have the same values into summary rows, while the HAVING clause is used to filter rows based on a specified condition after they have been grouped.
The key difference between the two is that the GROUP BY clause is used to group rows before applying any filtering, while the HAVING clause is used to filter aggregated data based on the specified condition.
When using GROUP BY, it is important to remember that the columns included in the SELECT statement must either be part of the GROUP BY clause or be used with an aggregate function such as SUM, COUNT, AVG, etc. On the other hand, the HAVING clause is used to filter the results of the GROUP BY clause based on a boolean condition.
In summary, the GROUP BY clause is used for grouping rows based on specific columns, and the HAVING clause is used for filtering aggregated data based on conditions. While GROUP BY is used for grouping, HAVING is used for filtering grouped data.
Please login or Register to submit your answer