database
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WHAT IS DATABASE?
Supilesh Sukumaran
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DATABASE?
A database is an organized collection of data.
The data is typically organized to model relevant
aspects of reality.
In a way that supports processes requiring this
information
DataKnown factsTypes: text, graphics, images, sound, videos
Database management system (DBMS)Software package for defining and managing a database
GENERAL CONCEPTS
Characteristics:
Data is organized into tables: rows & columns
Each row represents an instance of an entity
Each column represents an attribute of an entity
Metadata describes each table column
Relationships between entities are represented by values stored in the columns of the corresponding tables (keys)
Accessible through Standard Query Language (SQL)
RELATIONAL DATABASE
Data that describes the properties or characteristics of other data
Does not include sample data
Allows database designers and users to understand the meaning of the data
METADATA
SQL statements are used to retrieve and update data in a database.
Includes:Data Manipulation Language (DML)Data Definition Language (DDL)Data Control Language(DCL)
SQL
Syntax for executing queries, updating, inserting, and deleting records.
SELECT - extracts data from one or more tableINSERT INTO - inserts new data into a tableUPDATE - updates data in a tableDELETE FROM - deletes data from a table
Data Manipulation Language
Syntax for creating ,editing, deleting:
DatabasesTablesViewsIndexesConstraintsUsers
Data Definition Language
Data Control Language
Create privileges to allow users access to, and manipulation of, the database.
There are two main commands:
GRANT to grant a privilege to a user
REVOKE to revoke (remove) a privilege from a user
FIREBIRD
Firebird is an open
source SQL relational database
management system that runs
on Linux, Windows, and a variety
of Unix.
IB Expert is a professional Integrated
Development Environment for developing and
administration InterBase and FireBird databases.
Whether you enjoy the control of hand-coding
DML or DDL statements or to work in a visual
editing environment, IB Expert makes it easy to
get started and provides you with helpful tools to
enhance your experience.
FIREBIRD WITH IB EXPERT
IBExpert is the leading GUI tool for
Firebird and InterBase® databases.
Produced by IBExpert KG, headed by
Holger Klemt, who has more than 21
years experience in database design and
development.
YES IT’S A BIG BUSINESS
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