By Neeraj Sharma, Liviu Perniu, Raul F. Chong, Abhishek Iyer
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For example, for your relations the attributes domain could be: DEPARTMENTS DepNo Numeric(2,0) DepName Character(20) Manager Numeric(3,0) Address Character(50) Budget Numeric(10,2) EMPLOYEES ID Numeric(3,0) EmpName Character(30) Job Character(10) Salary Numeric(7,2) BirthDate Date DepNo Numeric(2,0) Each relation must have a primary key. The candidate keys for the DEPARMENTS relation are: DepNo and Manager. One of them will be the primary key of your relation and the other will be the alternate key.
Data Independence 13. C. Integration 14. D. Federation 15. E. None of the above 9. In the evolution of database management systems, in which stage would pureXML be? 16. A. Data independence Database Fundamentals 17. B. Extensibility 18. C. Optimization 19. D. Integration 20. E. None of the above 10. What is one key differentiator of DB2 on the Cloud? 21. A. It has a spatial extender 22. B. Its Database Partitioning Feature 23. C. Its pureXML technology 24. D. All of the above 25. E. None of the above 36 2 Chapter 2 – The relational data model In this chapter, we discuss the basics of the relational data model.
The formal notation for a join operation is: R
Database Fundamentals- First editon by Neeraj Sharma, Liviu Perniu, Raul F. Chong, Abhishek Iyer