What is the cardinality for the entity Department in the following ERD? Employee Department Employee number First name Last name Job title Dept number Dept number works Dept name in Dept location Instruction: Use proper spelling and/or punctuation in your answer.
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- Which statement is associated with two seperate entities. a) Attribute b) Entity Type c) Reflective Relationship d) RelationshipIn an ERD, entities do not have columns. Instead which of the following is used to describe the entity's characteristics? Group of answer choices attributes degrees instances relationshipswhat is another term for an entity unique identifier? a) local key b) primary key c) association d) foreign key
- Look at the 4 entities below and assume that customer_id is the key common to all tables. • Customer: An entity that describes a customer. An instance occurs for unique customers only using name, date of birth, and login name as customer_id primary key. • Online: An entity that describes a customer purchasing activity online. An instance occurs when the customer completes the transaction. Customers can purchase more than once. • Visits: An entity that describes a customer purchase in a physical store. An instance occurs if a customer makes or purchase or checks-in using an app. Customers can visit more than once per day. • Satisfaction: An entity that represents data from a recent customer satisfaction survey. An instance occurs when a customer takes the survey. A customer is tracked by login name and can only take the survey one time. Use the information to match the following relationships. Answers can be reused more than once. The relationship between Customer and Online The…Entity Relationship Diagram of the business, as shown in the case. Completely and correctly specify all Entities, Relationships and Attributes Order: has one or many items; half by member half by anonymous member (no member number)Has: order number, each order item has total cost (with and without gst), number of store, cashier who took the order, member number (if provided), date on which the order was places, and, if the order is not picked up in-person, the date on which the order is shipped. Order-Item (one of the 1600 products):to identify: useorder number as well as a small “item sequence number” (which is unique within each order). product number, quantity ordered and the actial "unit price paid" If a valid member number is on the order, the system should use the product’s special “member price”, otherwise the product’s “regular price” is used. The average order includes 11 distinct order-items. Member (places 5 orders per month on avg):last name, given names, email…Observe the ER Diagram for the ABC Retailer: ABC RETAILER (ERD) PromolD PromoName Date ProductID Description Associatedwith PROMOTION PRODUCT BelongsTo BrandID BRAND BrandName Which of the following is true according to the ABC Retailer ER diagram? O We cannot keep track of products that do not belong to any brand We can keep track of products that do not belong to any brand O We cannot keep track of products that belong to any brand O We must keep track of products that do not belong to any brand O All of the above
- Q2- What is a composite entity, and when is it used?Question 2: For the following table find the relevant Functional Dependencies and resolve them till third normal form. Course Code Course Title Level Mode of Attendance Course Fee Start Date End Date Student ID Num. 14111 14332 14378 Student Name Alan Briggs Susan McBride David Adair 23 Business Accounting 3 Part Time £55.00 20/08/2016 24/08/2016 Student Address 24 Abbey Park, Bangor, BT19 1RT 19 Belmont Road, Bangor, BT19 3TR 14 Grange Park, Bangor, BT19 4TF Student Telephone 028 91468665 07798754623 Department Tutor Dept Head Student DOB 10/08/94 Business Trevor Albright Mr Alan Parkes 028 91584630 06/11/87 07891834277 to Enrolment Date 10/06/16 028 91488930 01/03/93 03/07/16 07891454235 05/07/16 Enrolled By:- Andrea Gilchrist David Smythe Andrea GilchristAll entity names, relationship names, and attribute definitions must be correct.
- O 4. Entity set The ISBN in the image below for "BOOK" Entity type is considered as: Main Sub Annual ISBN Author Title Sal ВОOK O 1. Multi-Valued Attribute O 2. Single Attribute 3. Partial key attribute 4. Key attributeUse the Information below and create a sequence diagram for the use case. Name: Buy Parts Actor: Customer/Store Associate Description: This use case describes the process used to buy parts at the auto parts dealer. Successful Completion: 1. Customer requests auto part 2. Store Associate checks on availability of part 3. Part is available and customer pays cost 4. Customer receives part and stock is adjusted 1. Customer requests auto part 2. Store Associate checks on availability of part 3. Part is not available and customer selects to order part or no part 4. Customer receives part and stock is adjusted (if alternate part ordered) or customer leaves with no part Alternative: Pre-Condition: Customer wants to purchase part Post-Condition: None Assumptions: NoneEmployee: (EID, Name, City, Address) Department: (DID, Department_Name, City, budget) Works_IN: (EID, DID, Annual_Salary, Start_Date) Manages: (ManagerID, DepartmentID, rank) DID and EID in Works_IN relation are foreign keys referencing the primary keys of the Department and Employee relations respectively. Manager_ID and Department_ID in the Manages relation are foreign keys referencing the primary keys of the Employee and Department respectively. From the relational schemas illustrated above, use the different relational algebra operators and operations (p, 6, n, n, U, -, A) discussed in class to build the following queries: Display employees (by name and address) from "Chicago" and with an annual salary between 60000 (included) and 90000 (excluded) then rename the output as "ChicagoEmployees" 1. 2. For each employee, who works in the "Design" department since January 2009, display the employee's name and the employee's annual salary 3. Find the name and rank of the manager who…