A logical OR expression returns either true (1) if at least one of its operands is true (1), or false (0) if both operands are false (0). If both operands are null, the expression returns null.
or
A logical OR expression returns either true (1) if at least one of its operands is true (1), or false (0) if both operands are false (0). If both operands are null, the expression returns null.
or