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Computer Science & Engineering 2111 Introduction to Database Systems 1 CSE 2111 Introduction to Database Systems
description
Computer Science & Engineering 2111. Introduction to Database Systems. Database Terms. Data A collection of numbers and text 273459368 Information Meaning derived from the data SSN: 273-45-9368. What is a database?. A large collection of data stored in a well-defined structure - PowerPoint PPT Presentation
Transcript of Computer Science & Engineering 2111
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Computer Science & Engineering 2111
Computer Science & Engineering 2111
Introduction to Database Systems
CSE 2111 Introduction to Database Systems
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Database Terms
– Data• A collection of numbers and text
– 273459368
– Information• Meaning derived from the data
– SSN: 273-45-9368
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What is a database?• A large collection of data stored in a well-defined structure
– You can think of a database as• An electronic filing system• A repository for large amounts of information
– Example of a paper database• Telephone book
• Examples of computer databases– Ohio State stores student information in a database– Insurance companies store policy holder information in a
database– Your employer stores your information in a database
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Database Software• How do I create a database?– Purchase the software
• We will use MS Access 2010, but there are many database software products– Oracle– Sybase– SQL Server
• How do I access information in the database?– Purchase a Database Management System (DBMS)
• A DBMS is a collection of programs that enable you to enter, organize, and select data in a database.– We will use MS Access 2010, but there are many database
management software products
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• The design should be initially created schematically, and then the database should be created using the chosen database software
Steps when setting up a Database
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1. Decide what information you will store in the database
Research Papers databaseFirst Name Charge Amount
Last Name Charge Date
Address Payment Amount
City Payment Type
State Payment Date
Zip Code
Home Phone
This database is a very simplistic one. Most databases you create will be much more complex.
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2. Create the layout of the database
• What tables do you need in your database?
• What is a table?– An entity used to organize information by categories of like
information
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Research Papers Database Tables
CSE 2111 Introduction to Database Systems
• ClientStores client information
• ChargesStores client charges information
• PaymentsStores client payment information
• PaymentMethodStores the payment method
Credit CardCashCheck
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2. Create the layout of the database
• What fields do you need in your database?• What is a field?– An attribute (piece of information) of the table/entity.
• How will you set them up?– Divide Tables into Inseparable Fields•Address as 1 field – • 17 Main St. New York, New York 10002
•Address as 4 fields• Street Address - 17 Main St. • City - New York• State - New York • Zip code – 10002
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Research Papers DatabaseTable Name: Client
Fields: Client ID
First Name
Last Name
Address
City
State
Zip Code
Home Phone
Table Name: Charges
Fields: Client ID
Charge Amount
Charge Date
Table Name: Payments
Fields: Client ID
Payment Amount
Payment Type
Payment Date
Table Name: PaymentMethod
Fields: MethodID
MethodType
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2. Create the layout of the database
• Fields contain field types/data types and field properties• What is a field Type/Data Type?– Defines the type of information that can be stored. i.e. text,
numbers, dates, etc.
• What is a field Property?– Field size– Input Mask– Validity– Default Value
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Research Papers DatabaseTable Name: Client Field Type/
Data TypeProperties
Fields: Client ID Text 5 Characters long Primary Key
First Name Text 25 Characters long
Last Name Text 50 Characters long
Address Text 60 Characters long
City Text 25 Characters long
State Text 2 Characters long Default Value
Zip Code Text 5 Characters long
Home Phone Text 10 Characters long Input Mask
Table Name: Charges Field Type Properties
Fields: Client ID Text 5 Characters long
Charge Amount Currency None
Charge Date Date Input Mast
Table Name: Payments Field Type Properties
Fields: Client ID Text 5 Characters long
Payment Amount Currency None
Payment Type Text 2 Characters long
Payment Date Date Input Mask
Table Name: PaymentMethod Field Type Properties
Fields: MethodID Text 2 Characters long
MethodType Text 20 Characters long
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2. Create the layout of the database
• What will be the primary key for each table?• A field, or a collection of fields, whose values uniquely
identify each record in a table
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Research Papers DatabaseTable Name: Client Field Type/
Data TypeProperties
Fields: Client ID Text 5 Characters long Primary Key
First Name Text 25 Characters long
Last Name Text 50 Characters long
Address Text 60 Characters long
City Text 25 Characters long
State Text 2 Characters long Default Value
Zip Code Text 5 Characters long
Home Phone Text 10 Characters long Input Mask
Table Name: Charges Field Type Properties
Fields: Client ID Text 5 Characters long
Charge Amount Currency None
Charge Date Date Input Mast
Table Name: Payments Field Type Properties
Fields: Client ID Text 5 Characters long
Payment Amount Currency None
Payment Type Text 2 Characters long
Payment Date Date Input Mask
Table Name: PaymentMethod Field Type Properties
Fields: MethodID Text 2 Characters long
MethodType Text 20 Characters long
CSE 2111 Introduction to Database Systems
