DOUBLE sqrt(DOUBLE x) Returns the square root of x.x is required to be greater than or equal to 0.
:::tip Another alias for this function is dsqrt. :::
mysql> select sqrt(9); +-----------+ | sqrt(9.0) | +-----------+ | 3 | +-----------+ mysql> select sqrt(2); +--------------------+ | sqrt(2.0) | +--------------------+ | 1.4142135623730951 | +--------------------+ mysql> select sqrt(100.0); +-------------+ | sqrt(100.0) | +-------------+ | 10 | +-------------+
SQRT, DSQRT