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What is the difference between Group …

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What is the difference between Group by and Order by clause?

Posted by Vishal Shakya 3 years, 5 months ago

CBSE > Class 12 > Informatics Practices

1 answers

Sia ? 3 years, 5 months ago

S.NO	GROUP BY	ORDER BY
1.	Group by statement is used to group the rows that have the same value.	Whereas Order by statement sort the result-set either in ascending or in descending order.
2.	It may be allowed in CREATE VIEW statement.	While it does not use in CREATE VIEW statement.
3.	In select statement, it is always used before the order by keyword.	While in select statement, it is always used after the group by keyword.
4.	Attribute cannot be in the group by statement under aggregate function.	Whereas in order by statement, attribute can be under aggregate function.
5.	In group by clause, the tuples are grouped based on the similarity between the attribute values of tuples.	Whereas in order by clause, the result-set is sorted based on ascending or descending order.
6.	Group by controls the presentation of tuples(rows).	While order by clause controls the presentation of columns.

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