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Discuss how the one-to-one associations have to be implemented.
Some of properties of associations can be implemented directly by providing suitable declarations of the data members in relevant classes. Other semantic features of association can be enforced by providing only a limited range of operations in a class's interface or by including code in implementation of member functions which ensures that the necessary constraints are maintained.
Lock Based Protocol A lock is nothing but a mechanism that tells the DBMS whether a particular data item is being used by any transaction for read/write purpose. As there are t
Describe integrity and security? a) Domain constraint b) Referential integrity A value that appears in one relation for a given set of attributes also appear fo
What is the aim of logical schema ? The main motive of the logical schema is to ensure the portability of procedures and models on various physical schemas at runtime.
What is Hierarchical DBMS In HDBMS, data is structured in a tree like manner. There is a parent-child relationship between data items and the data model is very suitable for re
Briefly explain the state diagram by taking one example. State Diagram - An object can be given a sequence of input instructions. The state of the object can vary depending u
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 type of view of total database content? Data base content Conceptual view of total database contain.
Implementation and SQL Applications
how does Btree differ from a B+ - tree?
What are the two statements regarding transaction? The two statements regarding transaction of the form are:- A) Begin transaction B) End transaction
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