sqlcmd.net validated sql reference

Tag archive

#stddev

Commands grouped around the same concept, pattern, or recurring problem.

2 commands with this tag Browse related patterns quickly
intermediate aggregation MySQL MariaDB SQL Server PostgreSQL SQLite

Compute Standard Deviation and Variance

Measure how spread out values are with `STDDEV_SAMP` / `VAR_SAMP` in MySQL, MariaDB, and PostgreSQL, or `STDEV` / `VAR` in SQL Server.

advanced windowing MySQL MariaDB SQL Server PostgreSQL SQLite

Normalise Values to Z-Scores

Rescale each row's value to the number of standard deviations it sits above or below the mean using `(value − AVG … OVER ()) / STDDEV_SAMP … OVER ()`.