Build a 1-pg Entity Relationship Diagram that models the required tables and relationships using Microsoft® Visio®, Lucidchart, or another software tool of your choice. The table design and relationships must support the following functionality:
- Customers - Each customer is assigned a unique customer number but may have multiple locations to ship to. The sales team needs to be able to select the customer and the location for preparing sales orders.
- Inventory Table - The sales team will want to query the inventory to find diamonds that meet the following specifications of their customers:Cost - what SD has paid for the stone
- Price - what SD will sell the stone for
- Carat - weight
- Clarity - clarity scale for diamonds offered are IF, VVS1, VVS2, VS1, VS2*
- Cut - cut scale for diamonds offered are Excellent, Very Good, Good
- Color - color scale for diamond offered are D, E, F, G, H, I, J*
- Order Table - The sales team will want to make a sales order for existing customers and sell only diamonds that are in inventory. The DBMS must be designed such that customers can purchase multiple stones on one sales order.
*Diamond Scale Reference*
- Clarity:IF- Internally Flawless
- VVS1 - Very, very slightly included (pavilion)
- VVS2 - Very, very slightly included (crown)
- VS1 - Very slightly included (under 10X magnification)
- VS2 - Very slightly included (to the naked eye)
- Color:D, E, F - Colorless - color between D, E, and F diamonds can be detected only by a gemologist in side by side comparisons, and rarely by the untrained eye
- G, H, I, J, K - Near Colorless - diamonds color rated by a gemologist