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

What is dag, What is DAG? The class-subclass relationship is shown by a...

What is DAG? The class-subclass relationship is shown by a directed acyclic graph.eg: employees can be temporary or permanent. We might be create subclasses temporary \and perm

How are tables stored on disk?, How are tables stored on Disk? We reali...

How are tables stored on Disk? We realise that every record of a table can have different amounts of data. This is due to in some records; some attribute values may be "zero".

What database management system, Company XYZ is an advertising company. It...

Company XYZ is an advertising company. It has its own website but the search facilities offered are not reliable. The company is willing to invest to acquire new machines and sof

Nested query, what is correlation in nested query

what is correlation in nested query

ER model, coventions for displaying an ER schema as ER diagram

coventions for displaying an ER schema as ER diagram

Central database schema, Show a centralised schema to support the operation...

Show a centralised schema to support the operation of the system you have chosen, including in particular: the product catalogue; the outlets and respective stocks; customer record

Illustrate the cardinality of relationship, Cardinality of Relationship ...

Cardinality of Relationship One-to-One Only one entity of the first set is linked to only one entity of the second set. E.g. A teacher teaches a student. Only one teacher

What is a relationship called when it is maintained entities, What is a rel...

What is a relationship called when it is maintained between two entities? A relationship is called Binary relationship when it is maintained between two entities.

How to create a table from existing table, How to create a table from exist...

How to create a table from existing table? Create table as e.g, To create a new table ‘N_emp' with employee names and their identification numbers only from employee ta

What is an entity relationship model, What is an entity relationship model?...

What is an entity relationship model? The entity relationship model is a set of basic objects known as entities and relationship between those objects. An entity is a thing or

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