AVG
Aggregate function. Calculate the average value from a set of numbers. NULL values are ignored. If no values can be averaged, this function returns NULL.
Syntax
AVG ( [DISTINCT] expression )
Arguments
DISTINCT: optional keyword. If present, will average the unique values.
expression: any numerical expression. This may be a column name, the result of another function, or a math operation
Return Type
A double if the input type is double, otherwise decimal.
Examples
SELECT AVG(table_rows) FROM information_schema.tables; +-----------------+ | AVG(table_rows) | +-----------------+ | 1540.0000 | +-----------------+ 1 row in set (2.87 sec) SELECT AVG(list_price * discount) FROM items; SELECT AVG(age) FROM employees GROUP BY job_title;