avg

Introduced in: v1.1.0 Calculates the arithmetic mean. Syntax

avg(x)

Arguments

Returned value Returns the arithmetic mean, otherwise returns NaN if the input parameter x is empty. Float64 Examples Basic usage

Query

SELECT avg(x) FROM VALUES('x Int8', 0, 1, 2, 3, 4, 5);

Response

┌─avg(x)─┐
│    2.5 │
└────────┘

Empty table returns NaN

Query

CREATE TABLE test (t UInt8) ENGINE = Memory;

SELECT avg(t) FROM test;

Response

┌─avg(x)─┐
│    nan │
└────────┘

​avg