Database system vs file system ppt

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Show More. Views Total views. Actions Shares. No notes for slide. File systems versus a dbms 1. NOTE:-A flat file stores data in plain text format. In a relational database, a flat file includes a table with one record per line.

The different columns in a record are delimited by a comma or tab to separate the fields. Data stored in flat files have no folders or paths associated with them. First, the files were evaluated by analysts and programmers to determine the specific data required from each file and the relationships between the data and then applications could be written in a programming language to process and extract the needed data. Imagine the work involved if data from several files was needed.

It means that, with the change in the physical representation how the data is physically represented in disk or access technique how it is physically accessed of data, application programs are also affected and needs modification. In other words application programs are dependent on the how the data is physically stored and accessed. Data redundancy requires more storage space, and maintaining and updating data in several locations is expensive.

Data integrity can be compromised in a number of ways: human errors when data is entered, errors that occur when data is transmitted from one computer to another, software bugs or viruses, hardware malfunctions, such as disk crashes and natural disasters, such as fires and floods.

File-processing is rigid when compared to a typical database management system. In file processing it was difficult to determine relationships between isolated data in order to meet user requirements.

The security of data is low in file based system because, the data is maintained in the flat file s is easily accessible. For example, the structure of a file generated by a COBOL program may be different from the structure of a file generated by a 'C' program.

The direct incompatibility of such files makes them difficult to process jointly. When two or more users read the data simultaneously there is no problem, but when they like to update a file simultaneously, it may result in a problem. It provides control access to the data and ensures that data is consistent and correct by defining rules on them.

Bsc cs ii-dbms- u-i-database systems. Chapter02 succeeding as a systems analyst. Chapter06 initiating and planning systems development projects. Database design. Data processing by Neeraj Bhandari Surkhet. Related Books Free with a 30 day trial from Scribd. Business Analysis Debra Paul. Data Visualization: a successful design process Andy Kirk. Dynamic Models in Biology Stephen P.

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