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How is concurrency identified?
Concurrency in objects can be identified by the way they alter their state. Current objects can change their state independently. Aggregation implies concurrency in system.
What is a query tree? Ans: A query tree, as well known as operator graph, is a tree data structure that corresponds to a relational algebra expression. It denotes the inpu
The advantages of a database management system (DBMS) include :- Data integrity and elimination of duplication.
Evaluate: a.When transactions T1 and T2 are in a deadlock, one of the transactions will eventually implement to completion and let the other one continue implementation. b.
This project requires you to create a database design. Your design will be documented in a set of Entity-Relationship diagrams. Draw a set of Entity-Relationship diagrams to mode
Determine Which is not a consequence of concurrent operations? Ans: Update anomaly.
In a relation, tuples are not inserted in any definite order. Ordering of tuples is not defined as a part of a relation definition. Though, records may be structured later accordin
Example: RELATIONAL SCHEMA for PERSON: PERSON (PERSON_ID: integer, NAME: string, AGE: integer, ADDRESS: String) RELATION INSTANCE In this instance, m = 3 and n = 4
What is a primary key? Primary key is chosen by the database designer as the principal means of identifying an entity in the entity set.
What are composite objects? Objects that have other objects are known as complex objects or composite objects.
What are the difference between clustered and a non-clustered index? A clustered index is a special type of index that reorders the way records in the table are physically stor
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