stddevSampStable

Introduced in: v1.1

The result is equal to the square root of varSamp. Unlike stddevSamp this function uses a numerically stable algorithm. It works slower but provides a lower computational error.

Syntax

stddevSampStable(x)

Arguments

x — Values for which to find the square root of sample variance. (U)Int* or Float* or Decimal*

Returned value

Returns the square root of sample variance of x. Float64

Examples

Basic usage

DROP TABLE IF EXISTS test_data;
CREATE TABLE test_data
(
    population UInt8,
)
ENGINE = Log;

INSERT INTO test_data VALUES (3),(3),(3),(4),(4),(5),(5),(7),(11),(15);

SELECT
    stddevSampStable(population)
FROM test_data;

┌─stddevSampStable(population)─┐
│                            4 │
└──────────────────────────────┘

stddevSampStable​

stddevSampStable