IsBoolean
Result = IsBoolean ( vExpression ) AS Boolean
Result = Boolean? ( vExpression ) AS Boolean
如果
vExpression 是
Boolean类型返回
TRUE。
示例
PRINT IsBoolean(FALSE), IsBoolean((1 > 0) AND (2 > 1)), IsBoolean(IsBoolean("no matter what"))
PRINT IsBoolean(-1), IsBoolean(NULL)
参见