SQRT

Syntax

Description of sqrt.gif follows
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.

See Also:

Table 2-10, "Implicit Type Conversion Matrix" for more information on implicit conversion
  • 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, then the result is positive.

    • If n = -0, then the result is -0.

    • If n < 0, then 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