SQL
Statistical Aggregates
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|   |   |
|:--|:--------|
| **Description** |The population variance, which does not include bias correction. |
| **Formula** | `(sum(x^2) - sum(x)^2 / count(x)) / count(x)`, `var_samp(y, x) * (1 - 1 / count(x))` |
| **Alias(es)** | - |