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What is primary Key Explain?
Primary Key - Primary key is one of the candidate keys. It should be selected such in which its attribute values are never, or very rarely, changed.
Explain the B + tree? B + tree is a type of tree which denotes sorted data in a way that permits for efficient insertion, retrieval and removal of records, each of which is
What is a shadow copy scheme? It is simple, but efficient, scheme known as the shadow copy schemes. It is based on making copies of the database called shadow copies that singl
By using the delete operation some consisting records can be deleted from a relation. To delete some definite records from the database a condition is also specified based on which
Find a 3NF decomposition of the following relation scheme: University (Faculty, Dean, Department, Chair, Professor, Rank, Student}. The University relation satisfies the following
What is a candidate key? Minimal super keys are known as candidate keys.
Write a query to define tables students and teachers as sub tables of people? Create table students of student under people Create table teachers of teacher under people
what is the need of a log in dbms
Rules Of Data Normalisation Let us now summarise Normalisation with the help of various clean rules. The following are the necessary rules for the Normalisation process: 1.
Project Description: We have purchased facebook style chat software which we are using with our site. It is prepared in PHP but the rest of the site is developed asp.net. Iss
Need a sample of a clinic database relationships
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