What is the purpose of group by command? How is it different from Orde

1.	What is the purpose of group by command? How is it different from Order by command? Give example.
Answer» The GROUP BY statement is used with aggregate functions (COUNT, MAX, MIN, SUM, AVG) to group the result-set by one or more columns. The ORDER BY keyword is used to sort the result-set in ascending or descending order Example of Group By SELECT Dept No, COUNT(*) AS No of Teachers FROM Teacher GROUP BY Dept No; Example of Order By SELECT First Name, Last Name FROM Teacher ORDER BY First Name;

What is the purpose of group by command? How is it different from Order by command? Give example.

Answer»

The GROUP BY statement is used with aggregate functions (COUNT, MAX, MIN, SUM, AVG) to group the result-set by one or more columns.

The ORDER BY keyword is used to sort the result-set in ascending or descending order Example of Group By

SELECT Dept No, COUNT(*) AS No of Teachers

FROM Teacher

GROUP BY Dept No;

Example of Order By

SELECT First Name, Last Name

FROM Teacher

ORDER BY First Name;

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What is the purpose of group by command? How is it different from Order by command? Give example.

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