Is All-Is-One a buddhist belief?

As I underestand, buddhists beliefe there is no-self, means no permanent soul in creatures like us humans. Would a buddhist say, we all are part of one absolute consciousness? If so, is the degree of enlightenment someone has equivalent to the area of the absolute consciousness someone experiences? In other words: A buddha is 100% enlightend and thus he is equal to absolute consciousness? Sorry this sounds way to mathemetical, but I'm relatively new to buddhism, so I don't know the right words. Hope you can help me.