Computer Science & Engineering 2111

1. Computer Science & Engineering 2111 Introduction to Database Systems CSE 2111 Introduction to Database Systems

2. Database Terms • Data • A collection of numbers and text • 273459368 • Information • Meaning derived from the data • SSN: 273-45-9368 CSE 2111 Introduction to Database Systems

3. 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 CSE 2111 Introduction to Database Systems

4. 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 CSE 2111 Introduction to Database Systems

5. Steps when setting up a Database • The design should be initially created schematically, and then the database should be created using the chosen database software CSE 2111 Introduction to Database Systems

6. 1. Decide what information you will store in the database This database is a very simplistic one. Most databases you create will be much more complex. Research Papers database CSE 2111 Introduction to Database Systems

7. 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 CSE 2111 Introduction to Database Systems

8. Research Papers Database Tables • Client • Stores client information • Charges • Stores client charges information • Payments • Stores client payment information • PaymentMethod • Stores the payment method • Credit Card • Cash • Check CSE 2111 Introduction to Database Systems

9. 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 CSE 2111 Introduction to Database Systems

10. Research Papers Database CSE 2111 Introduction to Database Systems

11. 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 CSE 2111 Introduction to Database Systems

12. Research Papers Database CSE 2111 Introduction to Database Systems

13. 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 CSE 2111 Introduction to Database Systems

14. Research Papers Database CSE 2111 Introduction to Database Systems