MySQL SQRT() Function

In MySQL, the SQRT() function returns the square root of a nonnegative number.

`SQRT()` Syntax

Here is the syntax of MySQL SQRT() function:

SQRT(number)

Parameters

number: Required. A nonnegative number.

Return value

In MySQL, the SQRT() function returns the square root of a nonnegative number.

The SQRT() function will return NULL if the argument number is negative or NULL.

`SQRT()` Examples

SELECT
    SQRT(16),
    SQRT(25),
    SQRT(49),
    SQRT(100),
    SQRT(101),
    SQRT(-100),
    SQRT(NULL)\G

output

*************************** 1\. row ***************************
  SQRT(16): 4
  SQRT(25): 5
  SQRT(49): 7
 SQRT(100): 10
 SQRT(101): 10.04987562112089
SQRT(-100): NULL
SQRT(NULL): NULL

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