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DirtBike Order Database– ER Diagram

DirtBike Order Database– ER Diagram. Prepared by Shaylee Thar Fall 2012. Designing Databases with Entity Relationship Diagrams. Step 1: Define Entity Classes and Primary Keys. Step 2: Define Relationships Among Entity Classes. Step 3: Define Fields for each Relationship.

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DirtBike Order Database– ER Diagram

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  1. DirtBike Order Database– ER Diagram Prepared by Shaylee Thar Fall 2012

  2. Designing Databases with Entity Relationship Diagrams Step 1: Define Entity Classes and Primary Keys Step 2: Define Relationships Among Entity Classes Step 3: Define Fields for each Relationship Step 4: Create Database

  3. Step 1: Define Entity Classes and Primary Keys

  4. E-R Diagrams Use 5 symbols • Rectangle – entity class • Dotted line – relationship • | - single relationship • 0 – zero/optional relationship • Crow’s foot () – multiple relationship

  5. Step 2: Define Relationships Among Entity Classes CUSTOMER ORDER Detailed Orders DISTRIBUTOR PRODUCT

  6. Step 3: Define Fields for each Relationship Customer Order Product Distributor Detailed Orders

  7. Step 4: Create Database (At this point we will begin working with our DBMS system, which will be Microsoft Access)

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