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Discuss the differences among the candidate keys and the primary key of a relation. Give instance to describe your answer?
A candidate key is one that can be used as primary key which not null and unique constraint both is holding true. In short all primary keys are definitely candidate keys. That is one of the candidate keys is selected as primary key.
What are the function of DBA?
Consider the relations City (city_name, state) Hotel (name, address) City_hotel (hotel_name, city_name, owner) Answer the following queries in relational algebra (i) Find
To delete a particular column in a relation which command is used ? To delete a particular column in a relation ALTER command is used.
What benefits can a company gain by managing its own information infrastructure and servicea
Critically evaluate the bulleted list of information-related items in this case study. How are each contradictory to the notion of being an information-literate knowledge worker?
Problem: A DBMS built for Online Transaction Processing (OLTP) is usually regarded as unsuitable for data warehousing. Each system is designed with a different set of requireme
What is the way a particular application views the data from the database that the application uses? Sub schema is the way a particular application views the data from the data
Describe the shadow paging technique.
Project Description: We have an encrypted HSQL Database which we want to change into csv format. HSQL DB . We have java application (jar file) which reads that database but n
Answer SQL Queries to extract data from data tables and questions on mapping conceptual data models into relational data model.
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