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At its most essential level the DBMS architecture can be divide into two parts: the back end and the front end.
The back end is responsible for managing the physical database and giving the essential support and mappings for the conceptual, internal and external levels. Other advantages of a DBMS, such as integrity, security and access control, are also the duty of the back end.
The front end is really just any application that runs on top of the DBMS. These may be applications given by the DBMS vendor, the user, or a third party. The user deals with the front end, and may not even be aware that the back end exists. This interaction is complete through Applications and Utilities which are the major interface to the DBMS for most users.
Before defines the second type of integrity constraint, viz., Entity Integrity, we should be well-known with the concept of NULL. Mostly, NULL is intended as a basis for dealing
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Explain the Cascadeless Schedule A cascadeless schedule is one in which for every pair of transactions Ti and Tj like that Tj reads a data item before written by Ti, the commit
Define value set? Value set: It is a set of values. You do not always need a user to enter junk free text within all the fields. Therefore, Oracle Apps uses value set to valida
What are the various properties of Relational tables? Relational tables have 6 properties: 1. Each row is unique. 2. Column values are of the same kind. 3. Values are
i need help with creating database system for a library
What is first normal form? The domain of attribute must contain only atomic (simple, indivisible) values.
What are the features of embedded SQL? Explain. Embedded SQL - SQL could be implemented within two ways. It can be used interactively or embedded in a host language or throu
These permit the user to unload a database or parts of a database and reload the data on the similar machine, or on another machine in a dissimilar location. This can be useful in
Isolation or Independence : The isolation property shows that the updates of a transaction should not be visible till they are committed. Isolation assurance that the progresses of
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