Clapham Specialty Store Case Study

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CIS 336 Week 2 iLab 2 Devry University Copy and paste this link to get the tutorial: Lab two introduces the next step in creating a data model, the Entity Relationship Diagram (ERD). You will be given a business scenario for a company named Clapham Specialty Store, which is a small specialist grocery and delicatessen. The business specifications will outline a number of things about the business, some of which will apply directly to the database you are being asked to model. There is a table which lists the entities (tables) that will be needed for the database and related attributes (columns) for each entity. There is also a column that lists…show more content…
If there is not a single word that will apply, then supply a separate name for each direction of the relationship. Narrative/Case Study The Clapham Specialty Store is a small, specialist grocery and delicatessen. A new owner, John Balfour, who would like to expand the store and improve its profits, has recently purchased the store. The store sells general groceries, wines and liquors, and has a small deli counter. The store is open from 5:00 a.m. to 12:00 midnight. Many of the customers are repeat customers who come in to buy products they forgot from their regular grocery shopping expedition at the supermarket. The store sells about 3,000 different products ranging from toilet cleaner to 2 oz. jars of caviar, and champagne to liverwurst. Each product is displayed on a shelf on one side or the other of the aisle. The products arrive and their details (cost, quantity, SKU number, package size, purchase date) are recorded in the back room before they are displayed. The new owner wants to know which products the store sells most of and which are the most…show more content…
L A B S T E P S STEP 1: Drawing entities and attributes Be sure to include all of the entities that have been defined. You need to include at least the primary and foreign key attributes where applicable in your diagram. STEP 2: Indication of all relationships Be sure that you link all entities based on PK to FK relationships. There may be a case where you need to identify a combination PK and if so make sure that all of the relationships involved are defined. Be sure that you have set your Visio editor to show Crow's Foot notation. Also, be sure that you are defining the correct cardinality for the relationships. STEP 3: Naming of relationships Do not accept the default naming convention for your relationships in all cases. There may be some relationships where this is applicable, but in most cases you will want to explicitly name the relationship. Be sure that you have provided a verb phrase for both directions in the relationship. This is the end of lab

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