Answers for "why we use group by in sql"

SQL
1

what is group function in sql

--- GROUP FUNCTION | MULTI ROW FUNCTION | AGGREGATE FUNCTION 
--- COUNT , MAX , MIN , SUM , AVG
Posted by: Guest on January-07-2021
0

group by clause in ms sql

/*Group by clause is used to group a selected  set of rows into a set of summary 
rows by the values of one or more column or expression. It is always used in
Conjunction with one or more aggregate function.*/
SELECT AGGREGATE_FUNCTION(Column_Name) FROM Table_Name
/*Group by exmaple*/
SELECT city, sum(Salary) as TotalSalary FROM tblEmployee GROUP BY City
Posted by: Guest on June-11-2021
-2

group functions in sql

Multiple Row Functions (Group functions, Aggregate functions):
(Count, MIN , MAX, AVG, SUM)
will run for multiple rows and return a single value
Posted by: Guest on January-28-2021

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