Storing Databases

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DATABASESStoring Data for Business & Revenue Model Application

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What is a database?

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Stack of Hard Disks

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Think of a database like this …
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What is a relational database?

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How does
a database
work?
https://www.youtube.com/watch?v=z5YnKt2aOCs&t=128s

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What does SQL mean?
Structured Query Language
• SQL - Structured Query Language – is a special-purpose programming
language designed for managing and searching data held in a relational
database.

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What is database software?
• Database software is the phrase used to describe any software that is designed for creating
databases and managing the information stored in them.
» www.webopedia.com
• A database program is the heart of a business information system and provides file creation,
data entry, update, query and reporting functions. The traditional term for database
software is "database management system“
» www.pcmag.com/encyclopedia/term/40883/database-program
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Database Software Vendors
1. Oracle Database
2. Microsoft SQL Server
3. IBM DB2
4. SAP Sybase ASE
5. Postgre SQL
6. MariaDB Enterprise
7. MySQL
8. Teradata
9. Informix
10. Amazon SimpleDB
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The database market is a huge and growing market.
According to IDC, the overall database market tops
$40 billion today and should reach $50 billion by 2017.

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Assembling & Storing Data

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 Databases make Web search possible.
 Storing and retrieving data is what the Web is all about.
GOOGLE DATA CENTERS

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Database Mapping
• Organizing and
connecting
databases so
they can be
easily
searched to
produce useful
information.
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Database Administrator
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Data Redundancy
• Data stored in different locations is unlikely to be updated consistently
• Data redundancy – same data stored unnecessarily in different places
• Data inconsistency – different and conflicting versions of same data occur at different places
• Data anomalies – abnormalities when all changes in redundant data are not made correctly
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Data Redundancy - Example
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Database Normalization
• Database normalization, or simply normalization, is the process of organizing the columns
(attributes) and tables (relations) of a relational database to reduce data redundancy and
improve data integrity.
• Normalization involves arranging attributes in tables based on dependencies between
attributes.
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Database
Normalization
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In Class
• Question & Answer
• Case Studies & Examples
• Exciting Assignments …
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