Group functions ppt of Database

1. Group Functions
PRESENTED BY: SEHRISH ISHAQ

2. Group Functions
 In sql, the following group function can operate on a whole table or
on a specific grouping of rows. Each function return's one result.
 Group functions cannot be used in the where clause.
Group functions
 AVG
 COUNT
 MAX
 MIN
 SUM

3. MIN
 Min used with columns that store any data type to return the minimum
value
Example Result
Select MIN(Id) from WFP-countries 1
Select Min(country-name)from
wf_countries;
America
Select Min(hire-date)from employees; 17/Jun/1987

5. MAX
 Max used with columns that store any data type to return the maximum
value
Examples Result
Select Max(ID)from wf_countries; 100
Select Max(country-name)from
wf_countries;
Western Sahara
Select Max(hire-date)from employees; 29/june/2000

7. Count
 Returns the number of rows
 The COUNT() function returns the number of rows that matches a specified
criteria.
Example Result
Select count(*)from Employee 206

9. Sum
 Sum used with columns that store numeric data to find the total or sum of
values.
Examples Result
Select Sum(area)from wf_countries
where region_id=29;
241424
Select Sum(salary)from employees
where department_id=90;
58000

11. AVG
 Avg used with columns that store numeric data to compute the average.
Example Result
Select avg(salary)from Emp; 50000

13. Thank You