7.198 SQRT
Syntax
Purpose
SQRT
returns the square root of n
.
This function takes as an argument any numeric data type or any nonnumeric data type that can be implicitly converted to a numeric data type. The function returns the same data type as the numeric data type of the argument.
See Also:
Table 28 for more information on implicit conversion

If
n
resolves to aNUMBER
, then the valuen
cannot be negative.SQRT
returns a real number. 
If
n
resolves to a binary floatingpoint number (BINARY_FLOAT
orBINARY_DOUBLE
):
If
n
>= 0, then the result is positive. 
If
n
= 0, then the result is 0. 
If
n
< 0, then the result isNaN
.

Examples
The following example returns the square root of 26:
SELECT SQRT(26) "Square root" FROM DUAL; Square root  5.09901951