Relational algebra in dbms

1. Relational Algebra

2. Relational Algebra

3. Relational Algebra

4. Relational Algebra Operations

5. Selection Operator

6. Selection Operator

7. Selection Operator
Here D is written in “ ” because it is character, numbers are
not written in “ ”

8. Selection Operator

9. Selection Operator

10. Selection: Examples

11. Selection: Examples

12. Projection Operator

13. Projection Operator

14. Projection Operator

15. Projection Operator

16. Projection Operator

17. Projection Operator

18. Set Operators

19. Set Operators

20. Set Operators

21. Example: Union

22. Example: Union in projection

23. Example: Union in projection

24. Set Intersection Operators

25. Set Intersection Operators

26. Set Intersection Operators

27. Set Intersection Operators

28. Set Difference (-) Operator

29. Set Difference (-) Operator

30. Set Difference (-) Operator

31. Cartesian Product or Cross Product

32. Cartesian Product or Cross Product

33. Characteristics: Cartesian Product

34. Cartesian Product or Cross Product
Attributes of R1 and R2 are different. Suppose R2 has same named attribute say
B, then attribute in R2 will be written as “R2.B”.

35. Cartesian Product or Cross Product
Attributes of R1 and R2 are different. Suppose R2 has same named attribute say
B, then attribute in R2 will be written as “R2.B”.

36. Composition of Operations

37. Composition of Operations

38. Composition of Operations

39. Composition of Operations

40. Example: