square root function

The sqrt function returns the square root of the specified expression.

Syntax:

double sqrt(n)

Semantics:

• n: The argument n is an expression that resolves to a number.
• return type: double.
  • Returns a NULL value in the following cases:
    • n resolves to a NULL value
    • n does not resolve to a number
  • Returns NaN in the following cases:
    • n resolves to NaN
    • n is less than zero
  • Returns positive infinity if n resolves to positive infinity.
  • Returns the same value as the argument, if n resolves to positive/negative zero.

Example 12-93 square root function

SELECT sqrt(n) FROM Archery

Value of n	Output
16	4.0
12.57/pi()	2.00028879648171