jaydeee

HAVING is used when GROUP BY is used. It is like the WHERE clause in the group.

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arunanegi

Having clause used in case where we used group by clause and where clause used in any case.Both are used for filtering.

crismanaon

1- Where clause is used to entire query whatever having clause use only for group function.
2- Where clause is executed first than having clause.

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amankumar

A HAVING clause is like a WHERE clause, but applies only to groups as a whole, whereas the WHERE clause applies to individual rows.The HAVING clause is then applied to the rows in the result set. Only the groups that meet the HAVING conditions appear in the query output.

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Having clause is applied to each group of the grouped table whereas where clause is appliesd for select list.