1.

2.

Design a phone book database system using relational data model and then using SQL language fill all tables with information and apply all explained commands learnt previously. Numbers People Account 1. Fill all tables with required data. 2. Modify People add email attribute. 3. Show all data into Numbers table using natural joining with all linked tables. 4. Show People without any redundant data. 5. Find the person who has numbers started with 078 and 075. Apply more at least 5 more SQL commands onto previous exampl