1.Please create related three tables about a subjects (for exp. Students, Employees, Products, Books, Club_Membership, Hobbies etc.) must contain at least a default value definition and a primary key, a foreign key,unique,not null and check constraints

2.Create a non-unique index on each table for a non-uqiue column. (10 points) Write SQL commands below:

3 Create a sequence for primary key column on each table. (10 points) Write SQL commands below: