GROUP BY

The GROUP BY() Function is used to conjunction with an aggregate function to group the result-set by one or more column.

The basic syntax is as follows:

SELECT column_name,Aggregate_Function(column_name) FROM table_name WHEREcolumn_name operator value GROUP BY column_name

Employee
Emp_id	Name	Surname	Salary	Dept_id
1	Rajesh	Khanna	45000	2
2	Sneha	Gupta	55000	4
3	Sandeep	Nehte	95000	1
4	Kirti	Patil	25000	3
5	Nilesh	Jadhav	45000	3
6	Dipesh	Das	35000	5
7	Kailash	Rane	62000	1
8	Kavita	Deshpande	48000	3
9	Sanjay	Datt	50000	3
10	Shruti	Hasan	78000	1

Syntax For SQL:

SELECT Name, SUM(salary) FROM employee GROUP BY Dept_id

After Execute: 

First(Salary)

53800.00