In relational database management system, aggregate functions are the functions where the values of multiple rows are grouped together as input on certain criteria and provide a single value of more significant meaning such as a list, set, etc.
Following is a list of aggregate function in MariaDB:
MariaDB COUNT Function: In MariaDB database, COUNT function is used to return the count of an expression.
Syntax:
SELECT COUNT(aggregate_expression)
FROM tables
[WHERE conditions];
The COUNT () Function counts only NOTNULL values.
MariaDB SUM Function: MariaDB SUM function is used to return the summed value of an expression.
Syntax:
SELECT SUM(aggregate_expression)
FROM tables
[WHERE conditions];
MariaDB MIN Function: MariaDB MIN () function is used to retrieve the minimum value of the expression.
Syntax:
SELECT MIN(aggregate_expression)
FROM tables
[WHERE conditions];
MariaDB MAX Function: MariaDB MAX () function is used to retrieve the maximum value of the expression.
Syntax:
SELECT MAX(aggregate_expression)
FROM tables
[WHERE conditions];
MariaDB AVG Function: MariaDB AVG() function is used to retrieve the average value of an expression.
Syntax:
SELECT AVG(aggregate_expression)
FROM tables
[WHERE conditions];
Or
SELECT expression1, expression2, ... expression_n,
AVG(aggregate_expression)
FROM tables
[WHERE conditions]
GROUP BY expression1, expression2, ... expression_n;
MariaDB BIT_AND Function: Returns the bitwise AND of all bits in exp.
Syntax:
BIT_AND (exp)
MariaDB BIT_OR: Returns the bitwise OR of all bits in exp.
Syntax:
BIT_OR (exp)
MariaDB BIT_XOR: Returns the bitwise XOR of all bits in exp.
Syntax:
BIT_XOR (exp)
