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Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
Creating views with Read only option : In the view definition this option is used to make sure that no DML operations can be done on the view.
What does Aggregation mean?
Define blocks? The database system resides eternally on non-volatile storage, and is into fixed-length storage units known as blocks.
what problems are raised by the database? why is it so controversial? why is data quality an issue?
What are the technique to define a schema completely ? A schema is completely define by DDL and DML query language.
Describe relational model? Structure of relational data base Basic structure Database schema Keys Schema diagram Query languages
#A multinational tour operator agency has gained new business growth in the North American market through the use of social media. Its operation has expanded by 50% within six mont
Objectives After Reading this part, you should be able to: Explain the term CONCURRENCY; Describe the term transaction and concurrent transactions; Talk about co
Q. Explain data aggregatio n and discuss different design constraints. Sol. Aggregation One limitation of the E-R model is that it cannot express relationships amon
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