Group by and Having a clause in SQL

Group by and Having clause in SQL:- Group by and Having clause in SQL is very important topic of SQL. USE OF HAVING Clause HAVING clause: It is designed to be used with GROUP BY So that it can restrict the groups that appear in the final result table.Example: For each branch office with more than one member of staff, find the number of staff working in each branch and the sum of their salaries. Query: SELECT bno, COUNT(sno) AS count, SUM(salary) AS sum FROM Employee GROUP BY bn...
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