bit120 m02 l03 - storing data

© 2011 Neumont University

DATABASESStoring Data for Business & Revenue Model Application


What is a database?


Stack of Hard Disks


Think of a database like this …

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What is a relational database?


How does a database work?

https://www.youtube.com/watch?v=z5YnKt2aOCs&t=128s



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.



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 Vendors1. Oracle Database2. Microsoft SQL Server3. IBM DB24. SAP Sybase ASE5. Postgre SQL6. MariaDB Enterprise7. MySQL8. Teradata9. Informix10. 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.



Assembling & Storing Data


Databases make Web search possible. Storing and retrieving data is what the Web is all

about.

GOOGLE DATA CENTERS



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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