An owner of a relational database (ADMIN) created the following relations:
STUDENT = (ID, NAME, TOTAL_CREDIT, DEP_NUMBER)
INSTRUCTOR = (ID, NAME, SALARY, DEP_NUMBER)
COURSES = (COURS_ID, TITLE, DEP_NUMBER, CREDITS)
DEPARTMENT = (DEP_NUMBER, BUILDING, BUDGET)
The ADMIN user wants to pass privileges to other accounts X, Y and Z. Write the correct SQL statements to grant the following privileges.
1-Account X can retrieve or modify any relation except COURSES and can pass any of these privileges to other accounts.
2- Account Y can retrieve all the attributes of STUDENT and COURSES except TOTAL_CREDIT, DEP_NUMBER for both relations. [2 marks]
3- Account Z can retrieve any attribute of INSTRUCTOR but only for those whom working on the IT (DEP_NUMBER=2). [1 mark]
