1) Suppose there is the wide-area network with N nodes, where N ≥ 2. Find out the smallest number of the point-to-point communication links such that each node within the network is able to talk to one another node?
If you are worried about the having a disconnected network, what kind of the interconnection structure must you use when configuring your network?
2) Which of the following can only be utilized to link the tables which have a common column?
Full outer join
Join...on
Natural join
Cross join