Speaker :Gamal Mostafa Session : Database Concepts Session hosted by MUFIX Community

1. MUFIX COMMUNITY DB Beginners Approach

8. Primary key Unique value . Must have value (not null) .

9. Foreign key Allow Redundancy . Must have value (not null) . Must have the same values in the parent table

10. Composite key Key that contains two or more field to identify records .

11. Normalization Process of organizing and refining relations within database . Normal forms: are theoretical rules against which a relation is tested .

12. 1NF Each cell have atomic value .

13. 2NF Functional dependency on the primary key .

14. 3NF No transitive dependency (terminate redundancy) .

15. Database engine Microsoft Access . Oracle . MySQL . Sybase .

16. Structured query language (SQL) Language used to access and modify in Relational Database . SELECT department_name FROM departments;

17. Data Manipulation Language (DML) Select . Insert . Update . Delete .

18. Select SELECT department_name FROM departments;

19. Insert INSERT INTO departments(department_id, department_name, manager_id, location_id) VALUES (70, 'Public Relations', 100, 1700);

20. Update UPDATE employees SET department_id = 70 WHERE employee_id = 113;

21. Delete DELETE FROM copy_emp; DELETE FROM departments WHERE department_name = 'Finance';

22. Get Help Thank you [email_address]