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Improved performance:As the data is located near the site of its demand, and given the inherent parallelism because of multiple copies, speed of database access may be good for distributed databases than that of the speed that is achievable by a remote centralised database. Also, since every site handles only a part of the whole database, there may not be the similar contention for CPU and I/O services as characterized by a centralised DBMS.
er diagtram for icici
i am required to come up with entities relationships, optionality and cardinality from a scenario. there is a night club and bookings for a musician band
FDs in Relationships: Enrols Relationship: None as it is many to many Teaches Relationship : Course code → Instructor Instructor → Course code The next question is:
Define- relational algebra. The relational algebra is a procedural query language. It having of a set of operations that take one or two relation as input and make a new relati
Create an index for the table Client, field CLIENT_NO of Q ? Command: CREATE INDEX client_client_no ON client(client_no);
What is system catalog or catalog relation? How is better known as? A RDBMS maintains a explanation of all the data that it contains, information about every relation and index
how to operate database in access ?
Design an EER schema for the following application and translate the EER schema into relational schemas (and constraints). It is possible that some requirements cannot be captured
Explain trivial dependency? Functional dependency of the form α ->β. is trivial if α C β. Trivial functional dependencies are satisfied by all the relations.
Problem: (a) Briefly explain the ‘Hierarchical Database Model' using appropriate diagram. (b) List and briefly describe five potential benefits of the database approach comp
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