question in sql:

What is the difference between of join and where?

Select * from Employee E, Department D where E.emp_id = D.emp_id;

Select * from Employee E JOIN Department D ON E.emp_id = D.emp_id;

Question 1 The Tower of Hanoi is a game in which a stack of disks of varying sizes are moved from one peg to another. The diagram bellow shows the start and goal states. Start State Goal State Peg 1 Peg 2 Peg 3 Peg 1 Peg 2 Peg 3 . The rules of the game are: only one disk can be moved at a time a disk may only be moved if it is on the top of a stack disk can only be placed on an empty peg or a larger disk b) Solve recurrence relation to obtain explicit formula for Tower of Hanoi