In 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 relationships
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- in ERD, an Entity with a partial key is named: O Weak Entity Strong Entity O Partial Entity O Dependent EntityWhich statement is associated with two seperate entities. a) Attribute b) Entity Type c) Reflective Relationship d) RelationshipWhen an attribute of one entity type references another entity type's attribute, this means that: O it is a derived attribute O weak entity type exists O a relationship exists O it means nothing
- A ternary relationship is a relationship which includes Select one: O a. Two entities O b. Three entities Oc. One entity O d. Four entitiesIt is possible to have both a primary key and a candidate key for the same attribute.TRUE or FALSE - A super-entity can only have two sub-entities and no more. Select one: a.FALSE b.TRUE
- 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…What variables influence relationships, and how do they function?