Download Database Applications

THE DATABASE ENVIRONMENT
Where is the wisdom we have lost in
knowledge? Where is the knowledge we have
lost in information.
~ T.S. Eliot ~
Learning Objectives
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Concretize the concepts of data, information, data management
and metadata
Explain what a database is and why databases are important
Describe a database management system
Differentiate between the DBMS and a database
Describe the different data models and abstraction layers
Explain the similarities and differences among DBMS products
Explain DBMS history and modern uses
Describe how data is physically stored in primary and secondary
storage
Before we begin…What’s…
Data?
Information?
Data
Management?
Metadata?
Query?
Data or Information?
Where’s the
Data?
Where’s the
Metadata?
Where
is the:
Data?
MetaData?
Activity: Data or Meta-Data?
1.
2.
3.
4.
5.
6.
A Zip Code: 13244
A Zip Code is 5 Characters XXXXX
A List of First Names: Tom, Dick, Harry
A Picture, Like This One:
The Name of the Picture
file FrostTrees.jpg
When you place an order, the quantity of the
item ordered must be a number >0
Something
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Data can be information:
 $5
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strange and confusing:
(the amount of money in my wallet)
Information can be data:
I
calculate student final grades, then place them on a
form sent to the registrar’s office.
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Metadata can be data:
 The
names of MP3 files in your personal collection.
Actually it’s all about context!
What is it, part duex!
Database
Database
Management
System (DBMS)
Elements of a Database
Database
Meta-Data
Data-Management
Data “In”
Information “Out”
Data
End-User
DBMS is software. It stores the data/meta data and “enables” data-management
Clarification via Family Guy
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Brian can write his novel on a
typewriter or w/pen and paper.
But there are obvious
advantages to using word
processing software.
Most databases use DBMS’s just
like most papers are written
with word processors
Database  Brian’s Novel
DBMS  WP Software
What Can You Do with a DBMS?
Build Database Applications to solve
business problems.
For example…
LeadDist, Rebranding, inout,
my.ischool,
Is this: Database or DBMS?
Database or DBMS?
Database or DBMS?
SQL Server: Database or DBMS?
Database or DBMS?
Database or DBMS?

Four Ways to Slice Obama’s 2013 Budget
Proposal
https://www.nytimes.com/interactive/2012/02/13
/us/politics/2013-budget-proposalgraphic.html?_r=0
Database or DBMS?
Fundamental Axioms of DBMSs
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Users communicate with computer applications
(websites, etc)
Computer applications communicate with DBMSs.
Users do not communicate with DBMSs directly.
As a result DBMSs although they can be used
interactively, are not used interactively.
A DBMS is not a replacement for sound database
design principles.
First of many examples for the semester
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https://my.ischool.syr.edu
Website
You
Web Server (IIS)
Web Browser
Application
Components
User Interface
and Business
Logic
(HTML/C#)
Db using
Relational
Model
SQL Server
Data access
logic and
Data (SQL)
More Examples, with Stories.
Data or Metadata?
Database?
DBMS?
Data or Metadata?
Database?
DBMS?
History: There are Other DBMSs
Enterprise DBMS Market Share
Product
Oracle
IBM (DB2)
Microsoft (SQL Server)
Others: (Sybase, NCR Terdata, etc…)
Open Source (MySQL, PostgreSQL, etc…)
Share
44.4%
21.2%
18.6%
5.9%
9.9%
* Source: Computerworld 2007
DBMS deployment plans 2008
* source: gartner
An employable skill in the future.
Source BLS: 2008
http://www.bls.gov/oes/current/oes151061.htm
THE DATABASE ENVIRONMENT
Questions?
Reminder(s):
Quiz Wednesday on Unit 1
We meet in Hinds 010