Databases Essays

  • Integrity In Database Research

    1421 Words  | 6 Pages

    referential integrity important in a database? Entity Integrity: The relational model states that every relation, it must have an identifier, called the primary key (PK), in such a way that every row of the same relation be identifiable by its content, that is, by a unique and minimal value. The PK is a non-null set of attributes. The same format applies to the foreign key (FK) because each foreign key matches an existing primary key. A simple constraint of database relational model (RM) that refers

  • Pros And Cons Of Database Security

    1665 Words  | 7 Pages

    Database security concerns the use of a broad range of information security controls to protect databases (potentially including the data, the database applications or stored functions, the database systems, the database servers and the associated network links) against compromises of their confidentiality, integrity and availability. It involves various types or categories of controls, such as technical, procedural/administrative and physical. Database security is a specialist topic within the broader

  • Distributed Database Analysis

    1568 Words  | 7 Pages

    accessible information in today’s technology environment, the need for distributed databases and client/server applications is also increasing. A distributed database is a single logical database that is spread physically across computers in multiple locations that are connected by data network links. Distributed database is a kind of virtual database whose component parts are physically stored in a number of distinct real databases at a number of distinct locations. The users at any location can access data

  • Integrity Constraint In Database

    979 Words  | 4 Pages

    Integrity: Database displays the integrity. It means that accurate reflection of its UOD. The process of ensuring integrity is a major feature of modern information systems. The process of designing for integrity is a much neglected aspect of database development. e.g. Extension: Company Modules: Computer Science Department Marketing Department Electronics Department Employees:

  • Relational Database Essay

    2344 Words  | 10 Pages

    Relational Database: Databases are generally used to store some data in an organized manner. Hierarchical and Network model are highly used in earlier days. But nowadays relational model is used in order to connect two files which contain common fields. One of the most effective ways of storing data is by using relational database. Edgar codd is a father of relational database, who is an oxford trained mathematician working for IBM in a San Jose laboratory. Basically relational database is an application

  • Database Normalization Essay

    844 Words  | 4 Pages

    tables (relations) of a relational database to reduce data redundancy and improve data integrity. It involves arranging attributes in relations based on dependencies between attributes, ensuring that the dependencies are properly enforced by database integrity constraints. The steps to do the normalization: Step 1: Create first normal form (1NF): The database normalization process involves getting data to conform to progressive normal forms, and a higher level of database normalization cannot be achieved

  • Advantages And Disadvantages Of A Flat File Database

    1389 Words  | 6 Pages

    Flat File Database Definition of a Flat File database A flat file/ flat form database is a system that stores data within a single table. It is known as a flatform database due to it only containing a two dimensional structure (data fields and records). Features: - The database contains data fields which is the name of each piece of data being collected example address meaning that there will be a list of multiple addresses contained within that column. - The database also contains records which

  • Assignment 1: Database Security And Administration

    1554 Words  | 7 Pages

    DATABASE SECURITY AND ADMINISTRATION I. Meaning of Database Security and Administration Database Security is the ability that involves protecting, securing and controlling of data stored in the database against an unauthorized access towards data. Database security provides methods that control data stored in the database against outside intrusion and unauthorized. Database Administration is the method of controlling the database so that the database user can access, retrieve, update, delete and

  • Advantages And Disadvantages Of Distributed Database Systems

    1085 Words  | 5 Pages

    DISTRIBUTED DATABASES AND DISTRIBUTED DATABASE MANAGEMENT SYSTEMS 1. INTRODUCTION Distributed database systems (SBDD) are two approaches to meeting the data processing which may seem diametrically opposed: technology systems and the database of computer networks. Database systems have evolved from data processing in which each application to define and maintain their own data, to one in which the data are defined and managed centrally. This new orientation leads to independent data, such applications

  • Advantages And Disadvantages Of A Database Management System

    1208 Words  | 5 Pages

    DESCRIPTION OF DATABASE MANAGEMENT SYSTEM The database is a collection of some data and number of figures that can be treated to make information. Data represents contain facts. By using the Database Management System we can easily arrange the data in any simple manner. Database Management System will help to store the data where we can easily recover, operate and create information. EVOLUTION OF DATABASE Since, there are several advancement in the electronic industry, it paved the path for computer

  • Relational Database Management System Advantages And Disadvantages

    1500 Words  | 6 Pages

    Relational Database Management System: A relational database management system is a database management system that stores the data as tables which can related to each other. The tables might be related to each other by common attributes. It consists of a set of tables or files containing data that is fitted into some particular groups. These tables have data in the forms of rows and columns. Relational databases allows the user to update delete add and access a data entry from the tables. This

  • Database Management And Information Retrieval System Analysis

    1371 Words  | 6 Pages

    Analysis of database management and information retrieval system Modern organizations use one or more of the following system: database management system, information system and information retrieval system in order to store and retrieval their information / data efficiently. Question 1 Differentiate between database management system and information retrieval system by focusing on their functionalities. Database management system is a software system that enable user to define, create, maintain

  • Advantages And Disadvantages Of Relational Database Management System

    1110 Words  | 5 Pages

    Relational Database Management System: This type of database management system that stores the data in the form of related tables. It is a social database administrator which deals with some typical kind of queries and uses SQL for the development of the database. This type of database is a very powerful database as it deals with the relations which makes the data manipulations easier other than any other database. It has the features of data entry, data deletion, and creating of new entry and records

  • Database Management And Information Retrieval System Case Study

    1137 Words  | 5 Pages

    Question 1 Differentiate between database management system and information retrieval system by focusing on their functionalities. (30 marks). Database management system Information retrieval system Main software in computer system Obtain resources to the information relevant Offer Data modelling Facility Restricted to classify of object Structured data format Unstructured data format Provide precise semantics Provide imprecise semantics Complete of query specification Incomplete of query

  • Importance Of Database Security

    1822 Words  | 8 Pages

    knowledge and data are being stored on the companies database. So, the security and confidentiality of this data is a critical importance. Database security can be defined as the protection of data and information that is stored in a database. According to [1] database security primarily ensures the confidentiality, availability and integrity of the information contained in a database. Other authors including Clifton Christopher have defined database security as the assurance that data is protected

  • Oracle Database Breakdowns

    887 Words  | 4 Pages

    Q.24: Explain various types of Oracle database backups? Ans: The most vital backup is the physical backup. These backups are performed cold or hot, optionally. For taking a cold backup, the DBA has to shut down the Oracle database. Then, operating system copy commands are used to copy the data files of database. Destination of backup is specified by the DBA. In order to take hot backup, RMAN is known as the best performer. Ram can also take cold backup. Q.25: What is the most important requirement

  • Database Audit Log

    2097 Words  | 9 Pages

    Abstract—Information security policy demands auditing for the high performance databases so as to make sure data integrity. Database audit logs contain the information about database operations which are helpful to verify accuracy, lawfulness and to report risks. In financial systems, the audit logs should be monitored on continuous basis in order to detect and take action against any reasonably abnormal behavior. Outlier detection is a very important concept in the data mining which is useful in

  • Disadvantages Of Database Security

    719 Words  | 3 Pages

    Database Security Database security has become a growing concern all over the world and this may be due to many reasons. Most important is that data and information saved on database systems are always very important and very sensitive which means that these data need to be really secure and can not be accessed by any user. Many problems have raised from database system breaching and accessing sensitive data by non-authorized or non-authenticated users, and that is another reason why database security

  • Age Estimation

    1754 Words  | 8 Pages

    customer profiling, demographic statistics collection etc. Security applications have atmost importance in this area.The biometric features of each human being are unique. Age estimation is determines a person’s age or age group using facial images. A database of facial images is trained to extract features using algorithms such local binary patterns[LBP], active shape models[ASM], histogram of oriented gradients[HOG].Age estimation can be done using 3 age groups: child, adult, senior. Age

  • Advantages And Disadvantages Of Cbis

    1110 Words  | 5 Pages

    A computer-based information system (CBIS) is a single set of hardware, software, databases, telecommunications, people, and procedures that are configured to collect, manipulate, store, and process data into information. If we can see, nowadays every organizations already used a CBIS to reduce paper transactions and convert to an electronic system because the CBIS allows to insure people and property more efficiently and effectively. 2.0 DISCUSSION 2.1 COMPONENT OF CBIS 2.1.1 HARDWARE