DATABASE MANAGEMENT SYSTEM PART-1

DATABASE MANAGEMENT SYSTEM:

INTRODUCTION:

A database system is basically just a computerized record -keeping system.The database itself can be regarded as a kind of electronic of filing cabinet; that is ,it is a repository or container for a collection of computerized data files .User of the system can perform a variety of operations involving such files -for example:

Adding new files to the database

Inserting data into existing files

Retrieving data from existing files

Deleting data from existing files

Changing data in existing files

WHAT IS DATABASE SYSTEM ?

To repeat from the previous section, a database system is basically a computerized record -keeping system; In other words ,it is a computerized system whose overall purpose is to store information and to allow user to retrieve and update that information and to allow user to retrieve and update that information on demand.The information in question can be anything that is of significance to the individual or organization concerned - anything , in other word , that is needed to assist in the general process of running the business of that individual or organization.

DATA:

Database System are available on machines that range all the way from the smallest handheld or personal computers to the largest mainframes or cluster of mainframes.Needless to say ,the facilities provided by any given system are determined to some extent by the size and power of the underlying machine .In particular ,system on large machines tend to be multi-user,wheres those on smaller machines tend to be single-user. A Single-user System is a system in which at most one user can access the database at any given time; a multi - user system is a system in which many user can access the database at same time.

HARDWARE:

The hardware component of the system consist of:

The secondary storage volumes - typically magnetic disks- that are used to hold the stored data, together with the associated I/O devices,devices controllers,I/O channels , and so forth

The hardware processor and associated main memory that are used to support the execution of the database system software.

Types of communication

Four types of Communication: 1) Verbal Communication: Verbal communication can also be called as Oral communication. In very simple terms, any communication that happens orally between people is known as verbal communication. The objective of such communications is to ensure that people understand whatever you want to convey. Because of its very nature, verbal communications is more quick and precise then email communication. Nowadays, Verbal communication is an important aspect and is looked as a key strength in an individual . 2) Non verbal communication: Non-verbal communications or interpersonal communications. One of the HR requirements for new joiners in an organization is for them to have good interpersonal skills. This basically means that the employees should brush up on their non-verbal skills. If you were in a sales meeting and you have not achieved your target , how will you react? Will you be steady and calm or will you panic and stutter? These are importan

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