ain and range in real life scenarios. Please highlight the domain and range in the example. MAKE SURE IT IS UNIQUE.
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SQL
SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.
Queries
A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.
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- Explain why an index is only helpful if an attribute's values cover a suitable range. This is the only scenario when an index is relevant.A domain model should contain Question options: classes with relationships, operations, attributes. classes with relationships and operations. classes with attributes and relationships classes with attributes and operationsDomain Model Class Diagram LAB 6: Academic Scenario With the following information given below, design a domain model class diagram. A university has only full-time and part-time instructors. The details of an instructor include name, address, email, and number. The students in the university can enroll in a seminar and the details to be stored for each student include name, student number, and email. Each seminar consists of seminar name and seminar code. Full-time instructors are responsible for taking the seminars. Each seminar can be taken by at least one and at most two instructors. Part-time instructors can teach courses as well as full-time instructors. Each course consists of a name and course code. Students can register for a maximum of five courses per semester. A course can either be a university elective or an area elective. The availability of an area elective course depends on the number of available students for that course. A student can either be a bachelor, master's,…
- Observe the ER Diagram for the ABC Retailer: ABC RETAILER (ERD) PromolD PromoName Date ProductID Description Associatedwith PROMOTION PRODUCT BelongsTo BrandID BRAND BrandName Which of the following is true according to the ABC Retailer ER diagram? O We cannot keep track of products that do not belong to any brand We can keep track of products that do not belong to any brand O We cannot keep track of products that belong to any brand O We must keep track of products that do not belong to any brand O All of the aboveDesign the UML class diagram to support the system below and upload a picture of your diagram. Used Class Material Website: You are designing a website where students can resale their used material for a course. A course may have multiple sections. The course material is specific to each section of a class. Not all course may require class materials, but they may require many of them. A student can have many used materials for sale. The class material can be either: · Textbook: which has a price(mandatory), title(mandatory), authors(optional), edition(optional) · Software: which has a price(mandatory), title(mandatory), publisher(optional), and also its operating system (mandatory) · Equipment: which has a price(mandatory), title(mandatory), description(mandatory) All class material can be either available or sold. Do a class diagram with: 1. all the classes , 2. their associations 3. their multiplicity . 4. For each classes, where are the…Consider the following entity relationship diagram. Booking Employee Room Building • Booking ID • Employee ID • Building ID • Room ID • First Name • Room ID P • Name Description • Employee ID • Name Last Name • Date • Campus Zone • Email Address • Capacity • Start Time • Map Coordinates Phone • Bookable • End Time For each statement below, use the drop-down box to indicate whether it is true (answer 1) or false (answer2), according to the design decisions encoded in the ERD. Every booking is associated with exactly one employee. ✓ Every employee is associated with at most one booking. ✓ A building may contain no rooms that are recorded in the database. Each room may have many bookings. 1. True ✓ A room must have at least one booking. 2. False ✓ A booking can be associated with many employees. An employee may have no phone number recorded. ✓ A room must have its capacity recorded. ✓ A building is uniquely identified by its map coordinates.
- create one domain class diagram Use Case 1 Use Case Name: Self-service check in for road test Main Flow: Driver System 1 Requests to check in for road test. Prompts for scanning driver’s license. 2 Scans driver’s license. Searches driver’s information using the scanned driver’s license number, displaying driver’s full name, license number, expiry date, type of license, and booked road test information (date, time and location of the road test). Prompts for confirmation. 3 Confirm to check in. (*1) Records the check in by changing the road test status to checked-in; adds the driver into the waiting list for road tests. Alternate Flows Alternate Flow Description A1 Some information displayed is not correct. Driver will not confirm the check in and system will prompts the driver to go to a clerk for help.Explain why an index is only effective when an attribute's values cover a suitable range of values. This is the sole situation in which an index is helpful.Draw ERD and Map to Relations Map the ERD you have created to relations including all keys (PKs and FKs) Galaxy is an international Airline company. The company has several Airports each Airport is located at a different country. Each Airport has a name and capacity. Each Airport can hold several Aircrafts at the same time. Each Aircraft has ID, Type and Capacity. The Company has many Employees working in Airports. Each Airport has many employees working in it. Every employee working in an Airport can only one of three Jobs: Pilots, Admins and Mechanics. Each Employee has an ID, Name and salary. Pilots have Number of Flight hours and Mechanics have years of experience. The company keeps information of its customers. Each customer has Name and Passport ID. A customers can book one or more tickets. The company keeps information of its tickets such as flight date, Flight ID and Ticket ID. Each Ticket is associated with one customer and Aircraft.
- Draw a use case diagram based on the case study given below.Your diagram should contain at least 3actors, 8 use cases, and 2 include and 2 extend relationships. Shopping Made Easy System A customer uses Shopping Made Easy System for online shopping. System requires the customer to sign up and sign in to be able to interact with the system. Customer registration is verified by the administration. A customer may use the portal as a guest without signing up but is only able to view catalogues in case of a guest. A customer can manage his/her account which involves signup/sign in and profile management. A customer can browse through catalogues to view different products; customer can also search for a specific catalogue by name or code number. Customer can view the products and can log out without buying. Another main feature of the system is Shopping cart management. Customer can add or remove items in cart. Customer can check which items have…Create an ER model for a restaurant. The specifications are as follows: The customer has an id, name, address and telephone number. The customer can reserve a table before arrival. Each reservation has a unique key and includes the date and time of reservation and the number of seats. Upon arrival, the customer places an order. Each order has a unique order number and includes one or more food items. Each food item is distinguished by an id and has name and price. We also keep track of the cashier who settle the payment with the customer before he leaves the restaurant. The cashier has an id and name.create an Entity Relationship Diagram using the following Entities and their respective attritubes for an online programming competition registration for both leaners and university students. 1. Host it's attributes (host Id, hostFirstName,hostLastName, hostTelNum,hostEmail,hostPassword) 2. Student(StudentId, StudentfirstName, Student Email, StudentPassword, InstitutionName) 3. Learners(leaner Id, leanerFirstName, leanerLastName, leanerPassword, SchoolName) 4. Competition(compId, comName, compDate,comTime, compRules, compRequirements) 5. Qualified Student/Leaner (id, firstName, compId,email)