Types of Relationships

Primary key and the Foreign key  relationship. 

Rainbow Hotels stores information about their hotels in different countries. Every hotel is identified by hotel id, hotel name, hotel address, city and URL. Every country is identified by country code, country name and country currency. Guests staying in the hotel is identified by guest number, guest name, guest address and guest city. Every room in the hotel is identified by room number, and room floor. Every room booking is identified by booking id, starting date, and ending date. There are different types of rooms in the hotel. Each room type is identified by room type code, room standard rate, and description. In each country, there may be no hotels or more than one hotel. A hotel may have one or more rooms. A guest can book one or more rooms and a room may be booked by one or more guests. A hotel may have one or more bookings and each booking is associated with exactly one hotel. Each room type may have one or more rooms and a room belongs to one room type.

1) Write the schema of the appropriate relations for the above scenario. Identify the primary key and the foreign key in each of the relations.

How did you identify the primary key and foreign key? Explain.

2) Use the designed relations to write SQL statements for the following questions:  –   Explain the working of each query in detail.

a. Display all the rooms having the same rate in the ascending order of room rate.

b. List the number of hotels in each country. Only include countries with more than 4 hotels.

c. Display the details of hotels that is not yet included in any booking.

d. Display all the details of guests who booked hotels on ‘2021-05-10’.

e. Display the room number, room standard rate and the hotel id.

f. Display the details of countries with country name starting with letters other than any letter within ‘A’ and ‘P’.

Order any type of Service We Provide

We are the best assignment service that can satisfy student’s demands in different scientific fields. We perform tasks of any kind. Our specialists provide diverse custom assignment writing services to students from all over the world every day. You can contact us for assistance with:

• Essays of any type (application, scholarship, argumentative, personal, informative, persuasive, compare and contrast, narrative, analytical, cause and effect, critical, process, descriptive, expository essays);
• Homework,
• Assignments,
• Reviews of all types (for a book, an article, or a film),
• Reports,
• Annotated bibliography,
• Projects,
• Thesis,
• Term papers,
• Presentations,
• Lab works,
• Research papers,
• Speeches,
• Critical thinking,
• Capstone projects;
• plan;
• Coursework’s;
• Dissertations.

The list is far from complete!

Representatives of our student assignment service are connoisseurs of the peculiarities of presentation in regards to academics. Your college assignment will never turn out an untoward surprise! Whether you need research for high school, an undergraduate program, or a Master’s or Doctoral degree, you will get exactly what you are looking for to sound smart and well-informed.

If you are pressed for time, request our experts!

We are your academic saver. It is a perfect solution for people who need academic help but has no professionals nearby to provide it. Just redirect your home tasks to us and forget about any educational issues. With us, you will get 100% plagiarism-free content delivered on time by an experienced specialist in a particular field.

Main Advantages of Collaboration with Us

When you order professional assignments here, you will get:

Original custom papers. We value your academic reputation. Just as well, we value the years of thorough work on our reputation for reliability and never compromise the originality of delivered papers. We will never endanger both. Every custom assignment is written from zero – the only possible first stage of work on the order is research. We apply the latest plagiary checking tools on the final stage, so plagiarism has no chance to emerge in your college assignment writing.

Control over the order completion. To make the process of collaboration comfortable and efficient, we offer our clients to choose the writer themselves taking into account all the requirements and the budget. For you to save nerves, having entrusted your fateful task to some qualified “stranger”, we enable communication with the assigned writer in the process of order completion.

Affordable assistance. We are eager to contribute to the academic achievements of students in need of help with college assignments. We are eager to help you start investing in your career growth today. That is why our service is so affordable. We don’t charge to pay for the latest marketing tricks or advertisements – we choose the best experts in the labor market who write great custom papers in any area, level of complexity, and time frame. Our client’s grateful feedback is a top advertising trick.

On-time delivery. The quality of a paper is only valued when it is delivered within the determined time frame – you will get your custom assignment writing service in time and have a couple of days to revise it and ask for changes in case they are needed. And you will still have time to learn the material.

Protection. We value your trust and take all measures needed to keep your private and banking details safe. We offer only well-tested payment methods. Due to the system of encryption and protected servers, no third party can have access to your data.

Custom support 24/7. We do our best to make the process of collaboration comfortable for the customer. Our “write my assignment” help is always here for you to provide a solution to your problems, give you a prompt answer to any question, and offer clarification as to any issue related to the services. Feel free to contact us anytime!

If you feel that your dissatisfaction with student life is growing every day and you just feel exhausted, don’t hesitate to change the situation for the better today. Order your first assignment from reliable custom assignment services today to evaluate the advantages.

Having seen the difference once, you won’t want to go back to your previous lifestyle. You deserve to find fulfilment in other spheres of your life, have hobbies, spend time with close people but continue making progress. It is possible when you have a professional helper. Don’t put off your life for someday after graduation!

Order your paper now!