Daniel saw five visions about the fate of Israel prior to the last days. These visions are recorded in Daniel chapter 2 and chapters 7-12. These visions were given at different times but they all relate to the same prophetic events.
Daniel, in chapter 8, wrote, “I, Daniel, saw a vision after the earlier vision that had appeared to me.” In Daniel 10, the angel tells Daniel, “For here is a new vision about those days.” Each new vision gives more light on the same prophetic events.
The human statue and the stone in Daniel 2 is a revelation of five kingdoms. The four beasts and the Son of Man in Daniel 7 is a revelation of the same five kingdoms in Daniel 2, except that, in Daniel 7, more information is given on these five kingdoms. The vision in Daniel 8 is a revelation of the same five kingdoms but emphasis is laid on three of the five kingdoms (the second, third and fourth). The visions in Daniel 10-12 gives more information on the third, fourth and fifth kingdoms but lays more emphasis on the fourth.