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Aggregate functions

Last Updated: Jul 31, 2020

Distributed Relational Database Service (DRDS) supports the following aggregate functions.

Function Description
AVG() Return the average value of the argument
COUNT() Return a count of the number of rows returned
COUNT(DISTINCT) Return the count of a number of different values
MAX() Return the maximum value
MIN() Return the minimum value
SUM() Return the sum

Non-supported functions

Compared with MySQL 5.7, DRDS does not support the following aggregate functions.

Function Description
BIT_AND() Return bitwise AND
BIT_OR() Return bitwise OR
BIT_XOR() Return bitwise XOR
GROUP_CONCAT() Return a concatenated string
STD() Return the population standard deviation
STDDEV() Return the population standard deviation
STDDEV_POP() Return the population standard deviation
STDDEV_SAMP() Return the sample standard deviation
VAR_POP() Return the population standard variance
VAR_SAMP() Return the sample variance
VARIANCE() Return the population standard variance