Function | Description |
corr(key1, key2) | Returns the correlation coefficient of two columns. The calculation result range is [0,1]. |
covar_pop(key1, key2) | Returns the population covariance of two columns. |
covar_samp(key1, key2) | Returns the sample covariance of two columns. |
regr_intercept(key1, key2) | Returns linear regression intercept of input values. key1 is the dependent value. key2 is the independent value. |
regr_slope(key1, key2) | Returns linear regression slope of input values. key1 is the dependent value. key2 is the independent value. |
stddev(key) | Returns the sample standard deviation of the key column. This function is equivalent to the stddev_samp function. |
stddev_samp(key) | Returns the sample standard deviation of the key column. |
stddev_pop(key) | Returns the population standard deviation of the key column. |
variance(key) | Returns the sample variance of the key column. This function is equivalent to the var_samp function. |
var_samp(key) | Returns the sample variance of the key column. |
var_pop(key) | Returns the population variance of the key column. |
timeCost (response time) and SamplingRate (sampling rate) columns:* | select corr(timeCost,SamplingRate)
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