A database is an electronic store of data that acts as a repository for information about different entities. A database management system (DBMS) is software that manages the database and allows users to create, update and query the data. In a relational database, data is organized into tables that represent relationships between different entities. Integrity rules such as entity and referential integrity help maintain consistency within the relationships and data in the tables.

1. DATA BASE CONCEPTS:
A RELATIONAL APPROACH
DATABASE AN INTRODUCTION:
A database is an electronic store of
the data. It is a repository that stores
information about different thing.

2. DATABASE MANAGEMENT
SYSTEM(DBMS):
 A database management system(DBMS) software
package such microsoft Access visual fox pro
microsoft SQL-Server, or oracle
 Software-an operating system and a network operating
system
 Personal-a database administrator,a database
designer/analyst a programmer.

3. RELATION
 THE data base design requires you to create entity sets
each describing a set of related entities.
ONE TO ONE RELATION
ONE TO MANY RELATION
MANY TO MANY RELATION

4. THE RELATION DATABASE MODEL
PROJNO LOC Customer
1 miami Strocks
3 trenton Smith
5 phoenix Robins
6 edison Shaw
57 seattle Douglas
PROJ2002

5. TERMINOLOGY COMPARISON
Relational terminology File system terminology
Entity set or table or Relation File
Entity or Row or Tuple Record
Attribute or column File

6. INTEGRITY RULES
 In any database managed by an RDBMS, it is very
important that the data in the underlying tables be
consistent.
ENITY INTEGRITY
REFERENTIAL INTEGRITY