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Can a domain, assigned to a data element be changed? Yes. We can do so by just overwriting the entry in the field domain.
Objectives differentiate DDBMS and conventional DBMS; Describe Network topology for DDBMS; Describe the concepts of horizontal and vertical fragmentation; Descr
Define entity integrity and referential integrity. How does SQL allow specification of these? Ans: Entity Integrity Rule- If the attribute A of relation R is a prime attribut
Package classes and associations into models Programs are made of separate physical units which could be edited, imported, complied or otherwise manipulated. The careful part
What is the main advantage of the object model? What are its different components? The object model focuses on the logical data structures. Each object model comprises of many
create an e-r diagram usuing graphical dipicted software that could theoritically be used in resturant application
It defines that no primary key value can be null. This is as the primary key is used to recognize individual tuple in the relation. So we will not be able to recognize the records
How does a query tree represent a relational algebra expression? Ans: This includes transforming an initial expression (tree) into an equivalent expression (tree) that is
Objectives After reading this unit you should be able to: Explain storage of databases on hard disks; Discuss the execution of various file Organisation techniques;
Project Description: I would like to get a database of a website which has clients email name and phone number. If you are able to get information from a website, by entering
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