The properties of the relation object can be used to implement the master-detail functionality which most appropriate for your application. You can delete a master-detail relation by selecting it in the Object Navigator and choosing Navigator => Delete. Discuss the Deletion of Relations in detail.
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The properties of the relation object can be used to implement the master-detail functionality which most appropriate for your application. You can delete a master-detail relation by selecting it in the Object Navigator and choosing Navigator => Delete. Discuss the Deletion of Relations in detail.
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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.Primary keys and candidate keys may both be assigned to the same attribute.When the Search button is pressed in the screen depicted, the getSales() function from the PosDAO.java class is called, the parameters of this function are the from date and to date.The getSales () function should return a list of Pos objects that matches the criteria specified, Note this function has to perform two INNER JOINs in to combine all three tables in order to get all the needed data to fill the Pos object. The database schema is also depicted. The PosDAO, Product, SalesDetails and Pos classes are shown BELOW Write the getSales() function public class PosDAO { private Connection conn; PreparedStatement stmt = null; public boolean openConnection(){ try { // db parameters String url = "jdbc:mysql://localhost:4306/swen2005"; String user = "root"; String password = ""; // create a connection to the database conn = DriverManager.getConnection(url, user, password); if (conn!= null){ return true;…
- 1. Develop a data manipulation application with a user-friendly JavaFX GUI for student's database (as shown in the ER diagram below). The user should be able to edit existing data and add new data to the database (obeying referential and entity integrity constraints). Allow the user to edit the database in the following ways: a) Add a new student. b) Edit the existing information for a student. c) Delete an existing student. d) Add a new course registration for a student. Student Registration Course id 1 studentid id name courseid major grade name semester room 2. Upgrade the application in Ql to provide an appropriate JavaFX to allow the user to perfom a query that is defined in a TextArea and the results will be shown in a Tableview. Sample predefined queries are: a) Select all students studying "Software Engineering" major. b) Select students who have excellent grades. c) Select all pass students in ascending order based on their names. d) For all students studying "Computer…The following relations kind a part of a on-line database (the relations area unit self-explanatory): CUSTOMER/CLIENT/SHOPPERS/BUYERS(Cust#, CAddress, Ctown, Balance,Cname) ORDER(Order.#, Date, Cust#.) ORDERLINE(Order#, Part#., Amount-Ordered) PART(Part#., Desc, Stock, Item-Class, Unit -Price) Design a physical ER for the above scenario. With respect to this relative schema, write SQL statements for the subsequent queries: List the name of the client United Nations agency has placed Order 123 (i.e. Order: = 123). List the names of shoppers United Nations agency in Cardiff and have ordered half 456 (i.e. Part. 456). List the order numbers (Order) for orders that contain a minimum of three elements and also the quantity ordered are minimum of ten. List the outline (Desc), of these elements that the typical quantity ordered is bigger than the number ordered for half .6 (Part. = 456) so as 123.(Order. .123).//Need typed version please in text not image You are working with a database that stores information about suppliers, parts and projects. The Supply relation records instances of a Supplier supplying a Part for a Project. The schema for the database used in this question is as follows: ( primary keys are shown underlined, foreign keys in bold). SUPPLIER (SNo, SupplierName, City) PART (PNo, PartName, Weight) PROJECT (JobNo, JobName, StartYear, Country) SUPPLY (SNo, PNo, JobNo, Quantity) Provide relational algebra (NOT SQL) queries to find the following information. NOTE: You can use the symbols s, P, etc or the words ‘PROJECT’, ‘RESTRICT’ etc . do not need to try to make efficient queries – just correct ones. Where you use a join, always show the join condition. List the name of any part that was not used on a project that commenced in 2020. List the name of any part that has been supplied to all projects that commenced in 2020.
- The following functional dependencies describe a relation that is in 3NF.Book_ID -> Genre_ID, Genre_TypeGenre_ID -> Genre_Type True or False? Thanks.Design the database as a single relation called Movie. It should contain an ID, Title, Year Released, Genre (e.g., sci-fi, comedy, thriller, etc.), Rating (e.g., G, PG, R, etc.), Format (e.g., VHS, DVD, MP3, etc.), a free-form Comments field, plus the main cast and crew members. Add the following entry plus at least two of your own: Title: Star Trek Year: 2009 Genre: Sci-Fi Rating: PG Format: DVD Director: J. J. Abrams Starring: Chris Pine (Capt. Kirk), Zachary Quinto (Mr. Spock) Zoe Saldana (Uhura), Karl Urban (Bones McCoy) Draw your corrected design as a logical ERD showing attributes and multiplicities (suggest you use IE Notation in Oracle Data Modeler). No need to include physical data types. Modify the sample data from step 1 in a new page to match this designDesign the database as a single relation called Movie. It should contain an ID, Title, Year Released, Genre (e.g., sci-fi, comedy, thriller, etc.), Rating (e.g., G, PG, R, etc.), Format (e.g., VHS, DVD, MP3, etc.), a free-form Comments field, plus the main cast and crew members. Add the following entry plus at least two of your own: Title: Star Trek Year: 2009 Genre: Sci-Fi Rating: PG Format: DVD Director: J. J. Abrams Starring: Chris Pine (Capt. Kirk), Zachary Quinto (Mr. Spock) Zoe Saldana (Uhura), Karl Urban (Bones McCoy)
- Is it feasible to control the integrity of a field by picking a certain data type as the value for that field?Can the safety of a field be ensured by using a certain data type?Make use of Windows Presentation Foundation (WPF) to develop a Stock Management System thatwill manage the items being stocked in a warehouse. The application has 3 modules named: Addproduct, List Product, and Print Bar Code.Add Product:This module is used for adding new products to the system. It will require some basic details likeProduct category, Product Name, cost price, selling price, quantity and bar code. The details willbe saved into a SQL database named StockSystemdb. One other interesting feature of this systemis the alert system.You can set a particular quantity for each item. Now a notification or alert will be given to the userif a particular item’s quantity gets below the set quantity. This will help the user in gettingnotifications of the items getting low in stock.List Product:This module lists all the items present in the database of the Stock Management System. It will haveoptions to edit the details of each item or delete a particular item from the list.Print Bar…
