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Q. What is relational algebra and calculus? Explain the relational algebra operators :- Selection and predicate, set operation, joins and division. Sol. Relational Algebra
What is E-R model? This data model is based on real world that having of basic objects called entities and of relationship between these objects. Entities are explained in a da
what is meant semantic query optimization? how does it differ from other query optimization techniques?
The advantages of a database management system (DBMS) include :- Data integrity and elimination of duplication.
Removing a Synonym: DROP SYNONYM D30;
What are the object-oriented approaches Software systems which are designed with structured design methodology never support some of desired quality attributes for example reus
Q. Describe how an ER schema can be represented by relation schemas and constraints arising from ER design can be mapped to constraints on a relation schema. The entity rela
a need some real life examples of database management systems three level of ANSI SPARC architecture life teacher and student ,company and employee or for NGO etc.
Explain the paths in the association network We can analyze use of paths in the association network as given below: Calculate each operation Find associations whic
Differance between Unordered and ordered file ? Unordered file do no has any sequence although ordered file has arranged in a few sequence and data are assigned in ordered form
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