Create ERD using the following business rules. You can add Primary key and otherattributes that are related to.
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Create ERD using the following business rules. You can add Primary key and other
attributes that are related to.
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- What are the main differences between Primary key and Unique Key?11. Foreign key is the one in which the ________ of one relation is referenced in another relation. a. Foreign key b. Primary key c. References d. Check constraintDatabase course: (Please tell me the answer then I will put it in each box)
- 3- Write the business rules that are reflected in the ERD shown below (Note that the ERD reflects some simplifying assumptions. For example, each book is written by only one author. Also, remember that the ERD is always read from the "1" to the "M" side, regardless of the orientation of the ERD components.) PUBLISHER BOOK publishes submits wrtes CONTRACT AUTHOR signs %23Describe any issues you might have when doing join operations with the NATURAL JOIN keywords.q2
- Alternate keys: Identify at least five keys (not already listed as PK or FK) needed by end users. These indexes would be considered Alternate or Secondary keys and are mostly used for queries and quick reporting. They may contain multiple columns.def distance_between_entities(entity1, entity2):"""compute the haversine distance between the two entitiesAn entity is a tuple: (ID, City, State, Latitude, Longitude):param entity1::param entity2::return: the distance (in miles) between the entities"""pass ENTITES LOOK LIKE THISID,City,State,Latitude,LongitudeA45419E,Plattsburgh,NY,44.704021,-73.471148A19312D,Aiken,SC,33.554433,-81.69588A90172S,Tuscaloosa,AL,33.170238,-87.616169A19394D,Alexandria,VA,38.819853,-77.059645A27218D,Pittsburgh,PA,40.47441,-79.950968A68626D,Meadville,PA,41.611599,-80.114891A17494D,Allentown,PA,40.602658,-75.469236A86034S,Tonawanda,NY,42.99704,-78.878659A45142D,Asheville,NC,35.602711,-82.567281A38298S,Atlanta,GA,33.844371,-84.47405A14497Y,Roswell,GA,34.055198,-84.370475A25954D,Austin,TX,30.326374,-97.771258B46374X,Fairhope,AL,30.480713,-87.861306B52199S,Cedar…TRUE or FALSE - A super-entity can only have two sub-entities and no more. Select one: a.FALSE b.TRUE
- Task 1:Create a database Entity and Relationship Diagram (ERD) for the following application (Submitted An image of the Diagram By using Any Application:Application: The Application idea: It is a mobile application called (Khair) to help people. This assistance is moral, material. This assistance is also provided by good people in our community. Example to understand the Application idea more: For example, a person urgently needs a medical chair or bed and does not have the ability to purchase what he needs. The medical chair or bed is requested through the application, and whoever has what he requests initiates the request through the application’s messages and determines the meeting place. Application models (page): Login included: login registration login included: user name password New registration included: name E-mail Password phone number date National Identification Number Home page included: Request - applicant name - address - send message Messages list form included: list…Explain the difference between Primary Key and Foreign Key , give exampleCandidate Key is a key that may have many duplicates may be absent may be a foreign key contain only unique values and fully defines all other attributes in a row
