Database Administrator

 Topic Outline

  • Database Administrator
    • Functions of a Database administrator
    • Common Specialties of Database Administrator
  • Data Administrator
    • Responsibilities of a Data Administrator


Database Administrator (DBA)

A database administrator is an important person in the development of any database system. A DBA is responsible for the design, installation, configuration, upgrading, operation, management, and maintenance of the database. A database administrator makes sure the database of an organization and its applications operate efficiently. A database administrator must be a technically skilled diplomat. These skills are required to understand complex hardware issues and software issues. A database administrator should have good communication skills. 

A database administrator uses software to store data such as customer records, student records, bank records, etc. A database administrator makes sure that the data is available for users and it also secures data from unauthorized access. A database administrator is an important component of the information technology environment of any organization which relies on a database management system. The database administrator is responsible for managing the database environment. 

Functions of a database administrator

The main functions of a DBA are as follows:

Preliminary Database Planning

A database administrator participates in preliminary database planning if appointed early.
Identify User Requirements

A database administrator must identify the user environment. A database administrator studies the current system and its output. A database administrator also interviews the different users to know their current and future requirements. 
Maintaining Data Dictionary

The data dictionary is a collection of data about the database. The database administrator store the data item names, meanings, and their usage in a data dictionary. 
Designing Logical Model

The database administrator develops a logical model for an organization, after analyzing user requirements. The logical data model consists of entities, attributes, and their relationships. 
Choosing a DBMS

Based on the logical data model, the database administrator chooses a database management system. The database management system should satisfy all requirements and their constraints. 
Developing Physical Model

The database administrator creates the layout of data according to the database management system.
Creating Database

The database administrator creates the structure of the database by using a database management system after developing the physical model.
Loading Database

After creating the database, the data also load into the database.  
Maintaining the Documentation

The documentation is important when a project is reviewed. The documentation is maintained by the data dictionary system of a database management system. 
Training the Users

The database administrator should train the end-users, application programmers, so that they use the database effectively.

Helping Database Users

The database administrator helps the database users by making sure the data they require is available. 

Backup Procedure

If any portion of the database is damaged, it should be recovered as soon as possible. It is necessary to back up the information of the database on a backup server so that it may be recovered in case of loss.

Common Specialties of Database Administrator

System Database Administrator

The system database administrator is responsible for the physical aspects of a database such as installing and upgrading programs.  

Application Database Administrator

The application database administrator supports a database that has been designed for the particular application such as hospital patient software, bank customer software, etc.

Data Administrator

The need for a data administrator arises, In a large organization where a large amount of data exist. A data administrator is a person who is responsible for the entire data of an organization and whole information resources. A data administrator develops functional requirements for the databases used in the organization. A data administrator also controls and manages the database, communicates with users, makes logical designs, plans the development of the database and the application programs, trains users, etc.

Responsibilities of Data Administrator

  • The data administrator filters out relevant data.
  • The data administrator monitors the data flow throughout the organization.
  • The data administrator designs the concept-based data model.



Comments

Post a Comment

If you have any doubts, please let me know

Popular Posts

Computer Abbreviation

Topic Outline Introduction to computer abbreviation Abbreviation of system unit component  Abbreviation of storage devices  Abbreviation of input and output devices  Abbreviation of data communication and computer network Abbreviation of Programming Languages Abbreviation of Operating System and Networks  In this lecture, we will discuss the different Computer Abbreviations. Introduction to Computer & Information technology   Abbreviation   Full-Form   1   Computer     Common Operating Machine Particularly Used for Technological and Education Research   2   IPC   Information Processing Cycle   3   IT   Information Technology   4   PC   Personal Computer   5   CPU   Central Processing Unit   6   USB   Universal Serial Bus   7   ENIAC   Electronical Numerical Integrator and Calculator   8   EDVAC   Electronic Discrete Variable Autom...
Read more

Transport Layer

Image
  Topic Outline Transport Layer TCP Function of TCP UDP Difference between TCP and UDP Transport Layer The Transport layer is essentially responsible for delivering data to the appropriate application on the host computer. It receives requests from the application layer protocols and passes them down to the internet network layer. Two most commonly used transport layer protocols are the connection TCP and connection UDP. TCP  Transmission Control Protocol End to End communication for user processes. Processes can communicate in a simple stream of binary data. Each byte of data will arrive in the order it was sent. If some part of the data cannot be received this will be made explicit by an error being passed to the user code. Functions of TCP   (1) Data Transfer TCP transfer a continuous stream of bytes. TCP itself decides how to segment the data and it may forward the data at its own convenience. (2) Reliability TCP assigns a sequence number to each byte transmitted and ...
Read more

Introduction to Database

 Topic Outline Introduction to Database  Types of Data Metadata Components of Database Environment Application Program Range of Database applications Types of Users Types of Data Different types of data are as follow: Numeric Data It consists of numeric digits from 0 to 9 like 22, 58, 1123, or -123. The numeric data may be, either positive or negative. Alphabetic Data It consists of alphabetic letters from A to Z, a to z, and blank spaces. For example, "Computer", "Software", "IT", and "Automata" etc. Image Data Image data includes graphs, pictures, drawings,, and charts. Image data is more comprehensive.  Alphanumeric Data It consists of numeric digits (0 to 9) , letters (A- to Z) and all special characters (+, -, @, $, #) etc. Audio Data This data includes music, speech, and any type of sound. Video Data This data is a set of full-motion images played at a high speed. It is used to display actions and movement. Metadata The metadata can be defi...
Read more

Types of database

Topic Outline Types of Database Object-Oriented Database Centralized Database Decentralized Database Distributed Database Hierarchical Database Personal Database Cloud Database Multi-Dimensional Database Operational Database Relational Database  1:Object-Oriented Database Object-oriented database stores data in the form of objects. An object is an item that can contain data and functions. For example, an object employee may contain data about an employee such as Employee ID, Name, Address, Phone Number, etc. It may also contain functions to process the data such as printing the record of an employee, calculating salary, etc. Characteristics The object-oriented data model must be able to provide complex object representation. The object-oriented data model must be extensible. It means it provides support for defining new data types and methods. The object-oriented data model must support encapsulation or information hiding. The object-oriented data model must exhibit inheritance. In...
Read more

Threads in operating system

Image
  Topic Outline Threads Difference between thread and process Types of Threads Kernel Level Thread User Level Thread Multithreading Advantages Resource Sharing Responsiveness Utilization of Multiprocessor Architecture Multithreading Models Many to One Model One to One Model Many to Many Model Threads Thread is a basic unit of CPU utilization. Thread is also called a lightweight process. Thread is a process within a process but it does not have its own process control block. In a process, multiple threads are created. In a process, multiple threads allow multiple executions.   The thread consists of the following things. Thread ID Register Program counter Stack Difference between threads and process. Threads   Process   In threads no system  call  is  involved .   In a process system call is  involved .   Thread  is  a  lightweight  process.   The Process is  heavyweight .  If  the th...
Read more

Display devices

Image
  Topic Outline Display devices Types Cathode Ray Tube Flat Panel Display Emissive Display LED OLED Gas Plasma Non-Emissive Display LCD A display device is an output device. It is used to represent information in the form of text, graphics, images, and video. The display for a desktop computer is a monitor. Mobile computers and devices integrate the display in the same physical case. Some displays have touch screens such as mobile phones and laptops etc. The output displayed by a display device is called soft copy. Display devices are available in different sizes. For example When we write any document on the computer, it is a soft copy of the document. When we get a print of this document, it is a hard copy of the document. Types Types of display devices are as follows. (1) Cathode Ray Tube A cathode-ray tube creates an image on the screen by using a beam of electrons. Cathode ray tube consists of one or more guns. These guns fire a beam of electrons inside the screen. The monitor...
Read more

Shortcut keys of computer

Important Shortcut keys of Computer Shortcut keys are an easier and quicker method of executing the commands in the computer system. When we work on the computer, different shortcut keys are used. Some important shortcut keys are as follow: Short cut keys   Working   Ctrl+ C   Copy the select item   Ctrl+ V   Paste the item   Ctrl+ X   Cut the select item   Ctrl+ Del   Cut the select item   Ctrl+ A   Select all text   Ctrl+ Home   Go to beginning of the document   Ctrl+ End   Go to end of the document   Ctrl +( left arrow)   Move one word to the left at a time   Ctrl +( right arrow)   Move one word to the right at a time   Ctrl +( Plus key)   Adjusts width in window explorer   Ctrl +( Minus key)   Adjust width in window explorer   Ctrl+ Alt+ Del   Windows task manager   Ctrl+ Ecs   Bring up the start menu   Ctrl+F4   Close window in progra...
Read more

History of Computer

Image
  Topic Outline History of computer Abacus John Napier's Bone Blaise Pascal Von Leibnitz Charles Xavier Joseph Charles Babbage Herman Hollerith Atanasoff George Boole Mark 1 Computer ENIAC  EDVAC UNIVAC Commercial Computer History of computer Today those computers that we are used behind this many efforts of different peoples. An Abacus computing device was used for addition and subtraction. John Napier Bones created the slide rule to perform mathematical calculations. Blaise Pascal invented the mechanical machine for adding and subtracting. Von Leibnitz also invented the calculating machine that was used for division and multiplication. Charles Xavier invented the machine that could perform addition, subtraction, multiplication, and division.  Charles Babbage invented a difference engine and an analytical engine. A brief history is available below👇. The computer was invented because 'necessity is the mother of invention'. A brief history behind the invention of the comp...
Read more