Database

Database A database is a structured collection of records or data that is stored in a computer system so that a computer program or person can easily retrieve and manipulate the data using a query language.

Database Management System [DBMS] A database management system (DBMS) I computer software designed for creating and maintaining databases and allows users to retrieve information from that database. MS Access

Relational Database Management System[RDBMS] A type of DBMS in which the database is organized and accessed according to the relationships between data values. It is based on the relational model. Oracle, MS SQL Server,

Database Model A database model is a theory or specification describing how a database is structured and used. Three types of Data models are…  Hierarchical Model  Network model  Relational Model

Hierarchical Model Hierarchical data model organizes data in a tree structure, hierarchy is of parent and child data segments. Hierarchical model structures data as a tree of records, with each record having one parent record and many children

Network Data Model Network data model organize data as a network and the network model allows each record to have multiple parent and child records.

Relational Data Model A relational database allows the definition of data structures, storage and retrieval operations and integrity constraints. In such a database the data and relations between them are organized in tables.

Database Object Table is a database object or structure where the data is stored. A table will contains rows and columns. A row in a table is called 'tuple' and the column in the table is called 'Attribute'.