Determine the Disadvantages of file based systems, Database Management System

Assignment Help:

Determine the Disadvantages of file based systems

Some of the disadvantages of file based systems are like this:

  • Data redundancy and inconsistency: the dissimilar application programs may require similar data but may store it in separate files to be employed by them only. For instance, in a college environment, the address, contact no. etc., may be kept both by the office staff and the library staff to sent suitable reminders to the fee defaulters or to the students who have not returned the books on due dates, correspondingly. If a student alters the residence and that is reflected in only one of the system after that it leads to inconsistency.
  • Difficulty in accessing data: Although if the data is there in the file but if a new type of details is needed from the data, they cannot be retrieved if not and until a new application is written for it.
  • Data isolation: as data are scattered in several files, and files may be in different formats, writing new application programs to retrieve the suitable data is difficult.
  • Integrity problems: The integrity constraint can be applied by the application program, but not directly to the data file. For instance, there is a constraint to make sure that the balance of an account must not be below Rs. 1000, after that through application program this can be completed but someone may directly make the changes to the data file and violate this constraint.

Related Discussions:- Determine the Disadvantages of file based systems

Describe a technique for direct search, Describe a technique for direct sea...

Describe a technique for direct search? Explain how data is stored within a file so which direct searching can be performed. For a file of unordered fixed length records by u

Functional Dependencies, What exactly is the concept of Functional Dependen...

What exactly is the concept of Functional Dependencies? And how do we associate this concept with the logic of Super-keys, Candidate Keys, etc? Given Relation R(A,B,C,D,E) with de

Draw an e-r diagram and convert it to a relational schema, In an organisati...

In an organisation various projects are undertaken. Each projects can employ one or more employees. Every employee can work on one or more projects. Each project is undertaken on

Prepare an erd for the scenario, Question: (a) Prepare an ERD for the s...

Question: (a) Prepare an ERD for the scenario given below. (b) Convert the ER diagram produced in (a) above into its physical design. You have to choose an appropriate Pri

What is e-r model, What is E-R model? This data model is based on real ...

What is E-R model? This data model is based on real world that having of basic objects called entities and of relationship between these objects. Entities are explained in a da

Explain the term- periodic recomputation, Explain the term- Periodic recomp...

Explain the term- Periodic recomputation Periodic recomputation:  Base values are often updated in bunches. Sometimes, it is possible to just recompute all derived attributes p

Distributed query and transaction processing, a.  Construct a query around ...

a.  Construct a query around any one of the functional divisions you made in 4a such that if executed in the distributed design of 4 would require reconstruction of at least two ho

Ordering of tuples, In a relation, tuples are not inserted in any definite ...

In a relation, tuples are not inserted in any definite order. Ordering of tuples is not defined as a part of a relation definition. Though, records may be structured later accordin

What is database trigger, What is database Trigger? A database trigger ...

What is database Trigger? A database trigger is a PL/SQL block that can explained to automatically execute for insert, update, and delete statements against a table. The trigge

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