COVAR_SAMP
Returns the sample covariance for non-NULL pairs across all input values.
Syntax
COVAR_SAMP(expression1 numeric, expression2 numeric) → double
expression1: An expression that evaluates to a numeric type. This parameter is the dependent value.
expression2: An expression that evaluates to a numeric type. This parameter is the independent value.
Examples
SELECT COVAR_SAMP(transaction_count, gas_used)
FROM eth.recent_blocks
-- 31.70536780565699
SELECT COVAR_SAMP(DISTINCT transaction_count, gas_used)
FROM eth.recent_blocks
-- 31.7053678056971
SELECT COVAR_SAMP(transaction_count, gas_used)
OVER (PARTITION BY transaction_count)
FROM eth.recent_blocks
-- 2.442515362986122e-15
Usage Notes
This function supports the use of ALL
and DISTINCT
:
SELECT COVAR_SAMP( [ { ALL | DISTINCT } ] expression1, expression2)
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