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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 database by a set of attributes.
What is known as a search key? An attribute or set of attributes used to look up records in a file is known as a search key.
Explain Deadlock detection and recovery Deadlock Detection - A deadlock is said to take place when there is a circular chain of transaction, every waiting for the release of a
What is Primary key? Primary Key - Primary key is one of the candidate keys which uniquely identifies each row in the relation.
explain in detail about time stamp orderting/
give some example real-life situations where DBMS are most suiitabe
Can a domain, assigned to a data element be changed? Yes. We can do so by just overwriting the entry in the field domain.
A basic model of Database Access Control Models of database access control have grown out of previous work on protection in operating systems. Let us talk about one simple mode
(a) Why did SAP introduce the extended star schema?
Consider the relations given below Borrower (id_no, name) Book (accno., title, author, borrower_idno) (a) Define the above relations as tables in SQL forming real world assumptio
In which relational modes, cardinality is termed? Answer : Cardinality is termed in a number of tuples relational modes.
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