SQRT

Syntax

Description of the illustration sqrt.gif

Purpose

SQRT returns the square root of n.

This function takes as an argument any numeric datatype or any nonnumeric datatype that can be implicitly converted to a numeric datatype. The function returns the same datatype as the numeric datatype of the argument.

• If n resolves to a NUMBER, then the value n cannot be negative. SQRT returns a real number.

• If n resolves to a binary floating-point number (BINARY_FLOAT or BINARY_DOUBLE):

  • If n >= 0, the result is positive.

  • If n = -0, the result is -0.

  • If n < 0, the result is NaN.

Examples

The following example returns the square root of 26:

SELECT SQRT(26) "Square root" FROM DUAL;

Square root
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5.09901951