Difference between a Foreign key and Primary key
Foreign Key Primary Key 1. A foreign key can refer to its own relation . 2. One or more Foreign key can be treated in…
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What is entity integrity ? What is a relation ?
Entity integrity : The entity integrity constraint state that no Primary key value can be NULL, because the primary key value is used to identify…
Database management Software
To create a database it is not necessary to adopt a database management system we can create its own database system with the help of…
Schema
The DBA ( Database Administrator ) creates the database schema by a set of definitions, that is, translated by the DDL compiler, i.e. stored permanently…
Data Models
A collection of concepts that can be used to the structure of a database. By structure of a database, the data types, relationships, and constraints…
Difference between WWW and TFTP
WWW : WWW stands for World Wide Web or Web is A system that has made to access any document on the net , including…
Difference between TCP / IP and Internet
TCP / IP : TCP / IP stands for Transmission Control Protocol / Internet Protocol .TCP implements reliable connections between hosts . It is also…
Firewall
Firewall are technique that most organisation use to maintain the integrity of their information . “ A network firewall is a system or group of…
Difference between Intranet and LAN
Intranet : An Internet is a “network that uses Internet-based technologies within an organization to facilitate communication and access to information .” Intranet are typically…
Advertising
Almost all companies selling a good or a service use some form of advertising . Advertising is an impersonal, one-way mass communication about a product…