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Which database level is closest to the users?
External database level is closest to the users.
What is the aim of object design The aim of object design is to identify object which the system contains and the interactions among them. The system implements specification
Explain the Role of a database administrator a. Defining the Schema The DBA describes the schema which consists of the structure of the data in the application. The DBA
What is a view? How it is related to data independence? A view might be thought of as a virtual table, that is, a table that does not really exist in its own right but is inste
Discuss the problem of Spurious tuples and how we may prevent it. Ans: A spurious tuple is, mainly, a record in a database that gets created while two tables are joined bad
why are older data models are being replaced by new data models
In E-R diagram how generalization is represented? in E-R diagram generalization is represented by Triangle shape.
Explain algorithm of ER To Relational Mapping ? ER-to-Relational Mapping Algorithm: 1) Step 1: Mapping of regular entity types: For each strong entity type E, form a relatio
brief history,definition,current trends and future trends if any of data fragmentation
What does conceptual design work? A conceptual design involves modelling independent of the DBMS.
Problem: You are given the following schema 1. Flights(flno, from, to, distance) 2. Aircraft(aid, flno, aname, cruisingRange) 3. Certified(eid, aid) 4. Employees(eid, ena
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