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- True or False : ___ Multiple Inheritance happens when a class has more than one sub-class. This problem can be observed in Programming Languages as well. ___ Given two relations named A and B, if we q-JOIN A and B, the maximum number of attributes in the result relation could be (the number of attributes of A) times(*) the number of attributes of B). ____ * in an SQL SELECT statement means “all the tuples”. ____ In relational algebra, Cartesian Product (X) can be implemented using the q-JOIN operator. Cartesian Product ISA q-JOIN where q-condition always evaluates to true. ____ SQL is based on Predicate Calculus. A query in SQL always specifies what should be included in the query result.Implement all the classes using Java programming language from the given UML Class diagram. Note: This problem requires you to submit just two classes: Customer.java, Invoice.java. Do NOT include "public static void main()" method inside all of these classes. Graders will be testing your classes, using the unit-testing framework JUnit 4. Customer - ID:int -name:String -discount:int Discount rate in percent +Customer(ID:int,name:String, discount:int) +getID():int +getName ():String +getDiscount():int +setDiscount(discount:int):void +toString():String "name (ID)" The Customer class models, a customer design as shown in the class diagram. Write the codes for the Customer class and a test driver to test all the public methods. Invoice - ID:intDefine Response.Redirect method
- Database: CUSTOMER (CustomerID, LastName, FIrstName, Phone, EmailAddress) PURCHASE (InvoiceNumber, InvoiceDate, PreTaxAmount, CustomerID) PURCHASE_ITEM (InvoiceNumber, InvoiceLineNumber, Item Number, RetailPrice) ITEM (ItemNumber, ItemDesciption, Cost, ArtistLastName, ArtistFirstName) Write an SQL statement to show which cutomers bought which items, and include any items that have not been sold. Include CUSTOMER.LastName, CUSTOMER.FirstName, IvoiceNumber, InvoiceDate, ItemNumber, ItemDescription, ArtistLastName, and ArtistFirstName,. Use a join using JOIN ON syntax, and sort the results by ArtistLastName and ArtistFirstName in ascending order. Note that in Microsoft Access this require multiple queries. From Database Concepts 9th Ed. (Kroenke)How do you establish a self-referencing many-to-many relationship?Implement all the classes using Java programming language from the given UML Class diagram. Note: This problem requires you to submit just two classes: Customer.java, Account.java. Do NOT include "public static void main()" method inside all of these classes. Graders will be testing your classes, using the unit-testing framework JUnit 4. Customer - ID:int -name:String -gender:char 'm' or 'f' +Customer(ID:int,name:String, discount:int) +getID():int +getName ():String +getGender ():char +toString():String "name (ID)" The Customer class models, customer design as shown in the class diagram. Write the codes for the Customer class and a test driver to test all the public methods. Account
- account.json "1000001": { "accountType": "Chequing", "accountBalance": 0 }, "1000002": { "accountType": "Savings", "accountBalance": 0 }, "1000011": { "accountType": "Chequing", "accountBalance": 0 }, "1000022": { "accountType": "Savings", "accountBalance": 0 }, "1000031": { "accountType": "Chequing", "accountBalance": 0 }, "1000032": { "accountType": "Savings", "accountBalance": 0 }, "1000051": { "accountType": "Chequing", "accountBalance": 13.699999999999989 }, "1000052": { "accountType": "Savings", "accountBalance": 0 }, "1000071": { "accountType": "Chequing", "accountBalance": 0 }, "1000081": { "accountType": "Savings", "accountBalance": 0 }, "1000091": { "accountType": "Chequing", "accountBalance": 0 }, "lastID": "1000091"} ------- var express =…FD's BookID -> Title BookID > Author Title BookID Title -> Author Author -> Title Author -> BookID IS THIS 1NF? Yes this is 1NF. BECAUSE THERE IS SINGLE VALUE ATTRIBUTES.c++ language Create Class Student▪ Data Members: Name , ID and GPA.▪ Make the data members visibility to be private.▪ Use setter and getter method for each attribute.▪ In the main, set values for the student details using setter function, then retrieve the value using the getter function.▪ Print what you retrieve
- Registration Review Productid: Int Customer name: String Username: String Password: String Customerld: Int CustomerName: String ID Number: Int CreateReview(); Email: String EditReview(Int Reviewld); RegisterCustomer(): Customer CustomerName: String Customerld: Int PhoneNO: Int EditCustomer(); Search(); Stock Оrder Bookld: Int OrderID: Int CustomerID: Int Quantity: Int CustomerName: String BookName: String AddStock(); ModifyStock(Int Bookld); SelectStockltem(IntBookld); Payment: Int CreateOrder(); EditOrder(Int ordelD); Books BookID: Int BookPrice: Int BookType: String AddProduct(); ModifyProduct(); SelectProduct(Int ProductID); kindly draw ERD for the following class diagram with proper notation (cardinality) implement on any tool don't use hand written pleaseThe "SUPERVISES" Relationship is considered as: EMPLOYEE SUPERVISES O 1. Ternary Relationship O 2. Identifying Relationship O 3. Recursive Relationship O 4. Binary RelationshipCourse: Database Systems: Design and Application Web Shop scenario: A supplier (Supp-#) processes many purchase orders (PO-#) and sells a number of products (Prod-#). A product is sold by only one supplier. Each of the purchase orders that a supplier may process includes several products. The relationship between order and product is defined as "Line Item". A customer (Cust-#) may place one or more purchase orders. A purchase order may be placed by only one customer. Assignment requirements: Answer the following questions using above scenario: Identify the entities and attributes that required to draw the ER diagram. Integrate the entities with appropriate relationship and design the unified ER model.