IPT Year 12 how to design database
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This document provides steps for creating a conceptual schema diagram using the NIAM method and includes an example problem of creating a database for a native plant nursery. It outlines collecting elementary facts, drawing a first draft diagram, removing surplus entities, and adding constraints. The problem describes plant data to store, stock information, and sales/replenishment processes to model in the conceptual schema.
IPT Year 12 how to design database
- 1. Mrs. Schneider May 2012 How to create a conceptual schema (CS) diagram using NIAM steps with an example ‘problem’ IPT YEAR 12 RELATIONAL DATABASE
- 2. NIAM STEPS 1. State the elementary facts 2. Draw the first draft conceptual schema (CS) diagram. 3. Remove surplus entities and indicate derived facts. 4. Add uniqueness constraints 5. Add mandatory roles and cardinality constraints 6. Check that conceptual schema can be populated by examples given
- 3. BUSINESS ‘PROBLEM’ Nurture Nursery specializes in native plants. The business requires a computerised system that includes functionality for inventory control and production of identification tags.
- 4. PLANT DATA For each plant the system will need to store: biological name common name maximum growth height in metres colour of flowers the time of year for flowering picture of the plant. The identification tags will need to carry all this information.
- 5. MORE INFORMATION The plants are sold in four pot sizes (1 to 4), which have a corresponding retail price ($4, $5, $6, $8). The number of each plant in each pot size will also need to be stored. The nursery requires a simple way of updating stock numbers when plants are sold or stock replenished. The new stock most often comes in orders of a particular plant, but the business sometimes replenishes all stock by ordering a set quantity of all No. 1 size pots.
- 6. STATE THE ELEMENTARY FACTS Plant with Biological name Has Common Name of Plant with Biological name Has Maximum Height with metres Plant with Biological name Has Flower Colour with description
- 7. Plant with Biological name Has Flowering Time with description Plant with Biological name Has Appearance described by the picture Plant with Biological name Is in Pot Size with number
- 8. Combination (Plant – Pot Size) Has Quantity in Stock with number Combination (Plant – Pot Size) Has Total Value with $ Pot Size with number Has Price with $
- 9. DRAW THE DRAFT CONCEPTUAL SCHEMA
- 10. ADD UNIQUENESS CONSTRAINTS & MANDATORY ROLES
- 11. DRAW LOOPS AROUND THE ROLES OPTIMAL NORMAL FORM
- 13. WHAT IS NEXT IN THIS PROCESS? After creating the conceptual schema you would start to create table definitions (planning how you will create the tables) Draw draft forms (interfaces) Possibly create an information flow diagram Create the database within Access, Oracle etc.