Explanation on data sharing, Database Management System

Assignment Help:

Explanation on Data Sharing?


Related Discussions:- Explanation on data sharing

Write the queries in relational algebra, Problem: You are given the fol...

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

What is the full form of ddl, What is the full form of DDL? DDL is stan...

What is the full form of DDL? DDL is stand for Data Definition Language.

Increased parallelism-data replication, Increased parallelism : Since the r...

Increased parallelism : Since the replicated date has several copies a query can be distributed or can be answered from the smallest loaded site. Also, with more replicas you have

Which language used in application programs for request data, Which languag...

Which language used in application programs to request data from the DBMS is referred? Language which is used in application program is DML to request data from the DBMS is ref

Insertion anomaly-data redundancy, Insertion Anomaly: Inability to show ce...

Insertion Anomaly: Inability to show certain information-The primary key of the over relation be (enrolment number, Cno). Any new tuple to be inserted in the relation should have

Explain foreign key, Explain Foreign Key? Foreign Key - Let there are...

Explain Foreign Key? Foreign Key - Let there are two relations (tables) R and S. Any candidate key of the relation R that is referred within the relation S is known as the fo

Data dictionary, The database is to record information about artists for a ...

The database is to record information about artists for a (music) production company. An artist is the name of a singer or band; the name of the artist, the year the artist started

What is the function of sql server agent windows service, What is the funct...

What is the function of SQL Server Agent Windows service? - It's a Windows service that handles tasks scheduled within SQL Server environment. These tasks are also known as job

Explain dynamic two-phase locking, Explain Dynamic Two-Phase Locking H...

Explain Dynamic Two-Phase Locking Here a transaction locks a data item instantly earlier than any operation is applied on the data item.  After finishing all the operations on

Mention the purpose of sid and sod lines, Mention the purpose of SID and SO...

Mention the purpose of SID and SOD lines SID (Serial input data line): It is an input line by which the microprocessor accepts serial data. SOD (Serial output data line)

12/5/2013 4:35:24 AM

A. Data without sharing:
The mainly significant difference between a file-based system and a database system is that data are shared.

There are three kinds of data sharing:

(i)Sharing between Functional Units: The data sharing proposes that people in various functional areas use common pool of data, each of their own requests. Without data sharing marketing group might have their data files, purchasing group theirs, accounting group theirs and so on. Each group benefits only from its own data. The combined data are more important than sum of the data in separate files. Not only does each group carry on to have way in to its own data but, within reasonable restrictions of control, they have entrance to other data as well. The concept of merge data for common use is known as data integration.

(ii)sharing data between Different Levels of Users: Different levels of users need to share data.
Three different points of users are normally distinguished: operations, middle management and executive. These levels correspond to three different types of automated business systems that have evolved during past three decades:


a.) Electronic Data Processing (EDP): EDP was first applied to the lower operational levels of the organization to automate paperwork. Its basic characteristics include:
1. ) A focus on data, storage, processing and flows at operational level.
2. ) Efficient t transaction processing.
3. ) Summary reports for management.

b. Management Information System (MIS): The MIS approach elevated the focus on information systems activities with additional emphasis on integration and planning of information systems function. This includes following points:

1. ) An information focus aimed at middle managers.
2. ) An integration of EDP jobs by business function such as production MIS, marketing MIS, Personnel MIS.
3. ) Inquiry and report generation usually with database.
c. Decision Support System: DSS is focused still senior in the organization with emphasis on the following characteristics:


1. ) Decision focused, aimed at top managers and executive decision creators.

iii)sharing data between Different Locations: A company with several locations has important data dist rebutted over a wide geographical area. Sharing these data is an important problem.

A middle database is actually confined to a single location, controlled by a single computer. Most functions for databases are formed are accomplished more simply if database is centralized. That is, it is easier to revise, back up, query and control access to a database if we know accurately where it is and what software controls it.

A distributed database system is made up of some database systems running at local sites linked by communication lines. A query is then no longer a single process controlled by one software module, but a set of cooperating methods running at some sites controlled by independent software modules. For a distributed database system to function efficiently adequate communication technology have to be available and the DBMS in system must be able to communicate while interacting with communications facilities.

 

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd