Designing a Database (Part I) -Identify all fields needed to produce the required information -Group related fields into tables -Determine Each Table’s Primary Key -Include a common field in related tables -Avoid Data Redundancy -Determine the properties of each field -Unique identifier -Field, Composite, New -Foreign Key

Naming Conventions -64 characters long -Letters, numbers, spaces and special characters are allowed EXCEPT.!`[] -Avoid using quotation marks -Name cannot start with a space -Table and query name MUST be unique within database Luigi’s Naming Conventions: Lesson 1 Table Names: tbl_Doctor, tbl_Patient Object Type Relevant Name

Data Types – (Access 2003) Data TypeDescriptionField Size Text Letters, digits, special characters chars Memo Equivalent to text, longer chars Number Integer, decimals 1-15 digits Date/Time Jan 1, 100 to Dec, Multiple Date and Time Formats 8 digits Currency Same as number, not subject to round- off error 15 digits Autonumber Access controlled numbers 9 digits Yes/No Boolean, True/False 1 character OLE Object Images, video, sound, documents…. 1 gig HyperLink Internet address 2048 chars Lookup Wizard Field which looks in other table for values Same as primary key of other table

Field Properties PropertyDescription Field Size Length of input Format Predefined or custom (ie. Dates) Input Mask Restricts data input to characters, digits, etc. Caption Display name on forms Default Value Automatic Value for new row Validation Rule Limits input via “formula” <>, >, <, Like, … Validation Text Error message that appears if rule is broken Required Needs data?? Allow Zero Length Strings can be “” Indexed Indexing speed up search and sort but slows update

Primary Key and Foreign Keys -Uniquely identifies each record -No Duplicate Entries (avoids data redundancy) -Entity Integrity (no null values allowed for primary key) -Access display order is by primary key -3 categories of primary keys: -Inherit in field -Composite Key -Fields created for specifically PK -Foreign Key - field whose values are primary keys from another table or null

Table Diagrams tbl_CD CDIDAutonumberPrimary Key CDTitleTextTitle of the CD ArtistIdNumberForeign Key to tbl_Artist Field name Data Type Description Table Name

Lab Assignment -Continue with our hand-held application for the hospital -Part 1 – Scheduling -Doctors who work at multiple hospitals wish to have a hand-held application that will keep track of their appointments with patients -Doctor wants to be able to find out on any given day, where the appointment is, what time, and the patient’s name -Doctor also wants general background information on the patient

Lab Assignment TO DO: 1)Create Table Structures -Proper data types and field properties -Primary and Foreign Keys -Use as few tables as possible to get the job done 2)Input Data -Enter in a minimum of 5 rows for each table (10 or more would be ideal) -Test to make sure your restrictions work 3) HAND IN (towards Assignment #1) - A brief one page summary which includes table diagrams and an explanation of your design