SQRT

>>-SQRT--(--expression--)--------------------------------------><
The SQRT function returns the square root of a number.
- expression
- An expression that returns a value of any built-in numeric, character-string,
or graphic-string data type. A string argument is converted to double-precision
floating point before evaluating the function. For more information on converting
strings to double-precision floating point, see DOUBLE_PRECISION or DOUBLE. The
value of expression must be greater than or equal to zero.
The data type of the result is double-precision floating point. If the
argument can be null, the result can be null; if the argument is null, the
result is the null value.
Example
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