what is the difference between group and having
give an example with query and sample output
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Answer Posted / manub22
- GROUP BY clause works on the rows returned by a SELECT Query. This clause summaries identical rows into a single/distinct group and returns a single row with the summary for each group, by using appropriate Aggregate function in the SELECT list, like COUNT(), SUM(), MIN(), MAX(), AVG(), etc.
- HAVING clause works as a Filter on top of the Grouped rows returned by the Query containing the GROUP BY clause. This clause cannot be replaced by a WHERE clause and vice-versa.
Check the difference b/w GROUP BY & HAVING, link: http://sqlwithmanoj.com/2015/05/23/sql-basics-difference-between-where-group-by-and-having-clause/
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