Max() Function
The Max() function returns the maximum value of specified column.
Syntax:
Select Max(column_name)
From table_name;
Example:
Select Max(salary)
From teacher;
Min() Function
The Min() function returns the minimum value of specified column.
Syntax:
Select Min(column_name)
From table_name;
Example:
Select Min(salary)
From teacher;
Sum() Function
The Sum() function is used to perform addition on specified column.
Syntax:
Select sum(column_name)
From teacher;
Example:
Select sum(teacher_id)
From teacher;
Avg() Function
The Avg() function is used to return the average of specified column.
Syntax:
Select Avg(column_name)
From table_name;
Example:
Select avg(teacher_id)
From teacher;
Count() Function
The Count() function returns the number of records in specified column. It returns number of records from table when user uses * instead of column name.
Syntax:
- SELECT count(*)
FROM table_name;
- SELECT count(column_name)
FROM table_name;
Example:
- Select count(*)
From teacher;
- Select count(contact_no)
From teacher;
