DAD_220_-_2-2_QUIZ

32. In a relational model, relations are termed as a. Tuples b. Attributes c. Rows d. Tables

Translate the following ER Diagram into relational model. Show different relations that will result in addition to their attributes, PKs and FKs. (Ctrl) - Newspaper PK newaPaperio werk_fer Actor Journallst Jeurnalleio Jeurnalleame write Edition Articie publishediN. ditenio teleD dtenDate ralated_Te Topic PK topleo Ela nding

q10

Q4: Design a database for an airline. The database must keep track of customers and their reservations, flights and their status, seat assignments on individual flights, and the schedule and routing of future flights. Your design should include a set of relational schemas, and a list of constraints, including primary-key and foreign-key constraints. Please note that an E-R diagram is not required.

1. Create an entity named Doctor and Patient and create a one-to-many mapping using JPA. Doctor_id Patient_id Qualifica Contact_ Salary Age no tion n Doctor treats Patient Name P_Name Address Write a main program to assign values to the Doctor and Patient entity using entity manager instance.

14. A _____ is a property of the entire relation, rather than of the individual tuples in which each tuple is unique. a. Rows b. Key c. Attribute d. Fields

3. In mathematical term Row is referred as a. Relation b. Attribute c. Tuple d. Domain

age gender customer ID Customers first_name name zip code last_name makes total transaction_date Transactions M payment method transaction ID contains quantity N upc quantity_in_stock Products brand marked_price Product_name category Product_description a) Convert the above ER diagram into relational schemas. In a PDF file, specify the followings for each relation (i) the name of the relation, (ii) the names of its attributes, (iii) the domain of each attribute, (iv) the primary key, and (v) the foreign key(s), if any.

database Assume that you have the following relation; R(a,b,c) a   b  c ---------- 1  A   F 2  B   M 3  T   F 4   R  M 5   A  F And S is a relation with one attribute called c and has one tuple with the value 'F". Then the cardinality of R divided by S will be = ----- Select one: a. Non of the mentioned b. 2 c. 1 d. 3

ER Mapping : Convert the ER diagram into a relational database schema. For each relation, specify the primary keys and the foreign key(s) if any (50 pts) Upload you Relational Diagram here BANK BRANCHES BANK-BRANCH Code Name Addr Addr BranchNo АССTS LOANS N AcctNo Balance LoanNo Amount ACCOUNT Туре LOAN Type M M A-C L-C N Name N. SSN Phone CUSTOMER Addr

Create a database Entity and Relationship Diagram (ERD) for the following application (Submitted An image of the Diagram By using Any 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 of users Messager…

ID name Courses M semester Teaches N ID name Professors Convert the above ER diagram to relations in the normal manner, and then identify which of the following is a relation schema. O A. Courses (ID, Name) O B. Teaches (ID, ID, semester) OC. Professors(ID, name, semester) O D. Teaches (ID, semester)

4. _______ allow us to identify uniquely a tuple in the relation. a. Superkey b. Domain c. Attribute d. Schema

Do both with explanation

Which of the following is a key part of physical design in an entity relationship model? O This model converts attributes into columns. O This model does not depend on the database management software or the hardware used to implement the model. O This model avoids any database model-specific details. This model resolves the many-to-many relationships to multiple one-to- many relationships.

Database_420231VA_NDrawel Courses Academic Courses / Technical / Computer Science / Database (420231VA_8) / General / Mid_Exam I con page 1 UNION, INTERSECT, and MINUS work properly only if relations are union-compatible, which means that the names of the relation attributes and their data types must be different. 4 Select one: O a. True O b. False Jump to... Time left 0:57:42 You are logged in as Zachary Benallal (Log out) (430221108) Next page

Introduction to data base

hand draw an entity-relationship diagram to visually represent a database design this an example, you can choose any subject

Which of the following is a key part of conceptual design in an entity relationship model?     This model resolves the many-to-many relationships to multiple one-to-many relationships. This model adds all of the attributes for each entity. This model converts attributes into columns. This model does not depend on the database management software or the hardware used to implement the model.

Given the relation below named Student_Registration , answer the following questions.S_id S_Name S_Address Subject_opted401 Adam Noida Bio402 Alex Panipat Maths403 Stuart Jammu Maths404 Adam Noida PhysicsWhat is the relational schema of the relation Student_Registration? What is the degree of the giving relation? Is the column Name an atomic attribute/value? If no, justify your answer? What are the outputs of the given operations? σ_(Subject_opted=Bio) (Student_Registration

Relations describe the intersection between two axes, x and y. For example, a table (tuple) found in a database contains columns (attributes) and rows (records or observations). Database and Geospatial Mapping Application developers rely on tables and cartesian coordinate systems to adhere to the rules of relational database theory so that integrity in the location is preserved. Tables should only contain records that relate to the columns found in that table and the data domain determines what records should be stored in a given table. Database administrators can check for integrity in relationships within and between tables using structured query language (SQL). What other computer-science or IT jobs rely on relations?

Convert ERD to relations and show functional dependency of all relations CUSTOMER Customer_Name{pk} Name(FirstN, M, LastN) DOB [TotalAmount] CustomerType Rents COPY Copy_No {partial identifier} Current Condition [No_of_CheckOut] Check_OutDate Due Date [Amount_Paid] -Carries---H FILM FID{pk} Title Rate Category {Directors} Role performed by- ACTOR SSN{pk} Name

- The restaurant has two waiters (named John and Ali) taking order and collect payment from the customer. The customer can choose to pay using cash, Touch’n Go or credit card. The customer detail in the receipt is optional. Base on the given information above, draw a complete Entity-Relationship Diagram (ERD) with Crow’s Foot notation. Write all appropriate attributes, connectivity and cardinalities in the ERD.

1.

create a Relational Schema by mapping

Consider the following relations: Employee(E_id: integer, E_name: string, Age: integer, Salary: real) Works(E_id: integer, Dep_id: integer, Start_date: date) Department(Dep_id: integer, Dep_name: string, Budget: real, Manager_E_id: integer) What referential integrity constraints exist between these relations? What are the options for enforcing these constraints when a user attempts to delete a Dept tuple?

,,,,,,,