Draw ERD for Dusty Dude Ranch’s Include all correct attributes in the ERD. You can neatly hand draw the ERD and upload a picture of it, if need be. Show the relational schema that corresponds to the ERD you designed in the previous question. MAKE SURE TO SHOW
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PLEASE DRAW NEATLY!
Dusty Dude Ranch has decided to store information about the cowboys who work for the ranch in a
- Each Cowboy has unique cowboy ID, a full name, age, an address, an email, a nickname, horse or horses, and a set of Skills.
- Each Skill has a unique skill ID, name, description, and risk level.
- Each Horse has a unique horse ID, name, color, height and cost.
- Each cowboy may have one or more Skills, and a given Skill may be done by several cowboys.
- Each cowboy may have one or more Horses, but no Horse can owned by more than one cowboy.
- Do not forget about data retention.
- Draw ERD for Dusty Dude Ranch’s Include all correct attributes in the ERD. You can neatly hand draw the ERD and upload a picture of it, if need be.
- Show the relational schema that corresponds to the ERD you designed in the previous question. MAKE SURE TO SHOW PRIMARY KEYS AND FOREIGN KEYS!!
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- A student database may include indexes on fields such as major, age, marital status, and home zip code in addition to the main key, which is the student's unique identifier (all secondary keys). Let's assume the school wants a list of MIS or CS majors over the age of 25 who are married and from the 45462 zip code OR a list of CS majors under the age of 25 who are single and from the 45462 the code. Is there a way to utilize indexes to restrict access to just the records that meet this criterion?Q. Suppose we want to develop a browser-based training system to help people prepare for such a certification exam. A user can request a quiz for the system. The system picks a set of questions from its database, and compose them together to make a quiz. It rates the user’s answers, and gives hints if the user requests it. In addition to users, we also have tutors who provide questions and hints. And also examiners who must certify questions. List down the functional requirements of the above said system? Use Form based method for specifying “Make Quiz” functional requirement.ExerciseThe Prescriptions-B-A chain of pharmacies has offered to give you a free lifetime supply ofmedicine if you design its database. Given the rising cost of health care, you agree. Here's theinformation that you gather:Patients are identified by an- and their names, middle name, last name, addresses, M/F, and agesmust be recorded. Doctors are identified by a kísh. For each doctor, the name, middle name,family name, specialty, Department, and years of experience must be recorded. Eachpharmaceutical company is identified by name and has a phone number. For each drug, the tradename and formula must be recorded. Each drug is sold by a given pharmaceutical company, andthe trade name identifies a drug uniquely from among the products of that company. If apharmaceutical company is deleted, you need not keep track of its products any longer. Eachpharmacy has a name, address, phone number and location. Every patient has a primaryphysician. Every doctor has at least one patient. Each…
- Passenger (pid, pbithday, pcity)Station (sid, sname, sxcoord, sycoord)CheckIn (pid, departure_sid, arrive_sid, departure_date, arrive_date)departure_sid reference sid in Stationarrive_sid reference sid in Stationpid references pid in Passenger there are 400 million Passenger, 500 stations, and 20 billion checkIn stored in the schema. For simplicity, assume that every attribute is of size 8 bytes, and the size of each tuple is thus 8*x bytes for a table with x attributes, and that the size of a table is simply the size of a tuple multiplied by the number of tuples (i.e., 100% occupancy and no gaps or space for block metadata). Now consider the following queries: SELECT P.pidFROM Passenger p, CheckIn C, Station SWHERE P.pid = C.pidand C.departure_sid = S.sidand S.sname = "LA"and year(P.pbithday) = 2000and date(C.departure_date) = "2015-12-12" question:1. first join P with C, and then join result with S2. first join S with C, and then join result with PWhich way would be faster for this…The problems for this chapter use a database for a simple department store that sells items to customers and wants to keep track of the invoices, the selling price (if an item is on sale), and the sales tax (7%) to be collected on some items. Every customer and invoice are assigned unique numbers. All items have a Universal Product Code (UPC) number and bar-code assigned to each unique item. Food and non-carbonated beverages are not taxed, but clothing, home goods, and most other items are.Here's a situation to mull over: two students are interested in enrolling in the same class, but there's only room for one of them. What is it about a database that makes it so they can't sit together?
- SQL ER DIAGRAM DRAWING! Draw an ER diagram based on the simplified description given below (with diagrams.net for example) The restaurant's cash register system supports data transfer between the restaurant hall and the kitchen, collects information about ordered products for invoices, and keeps track of product delivery times. In its database, we want to store information about menu items, table invoices (table-specific invoices), orders and waiters. Each product on the menu has an identifier, name and price, and possibly one or more phrases describing the product (e.g. "lactose-free" or "vegan"). Both the product identifier and the name are unique. When the table party arrives at the restaurant and makes the first order, a table bill is opened on the table, where all the orders of the table are collected. The table bill has a unique identifier, the physical table number of the restaurant hall, the time the bill was opened, the total price and the time of payment. Each table…Creating a database Diagram. Does the attached image meet these criteria? Week 6: Lab Instructions Now lets consider designing a database for the a car lot. Consider the following statements -> Our car lot sells many cars every month (we have a big inventory) Our car lot has many customers (everyone loves us!) Our car lot has many sales persons (we are ready to help our customers) Each car sale persons sells many cars a week (our prices are great) Our car lot provides many mechanical services (all our mechanics are experts) Our Service department has many mechanics (any mechanic would love to work here) Our mechanics provide service to our customers (our repeat business is awesome) Examine the above information and determine the Entities. With each entity - determine some attributes for each entity. As a note - is there any information in the above statements that is not helpful for our database design? Now lets consider our Car Lot database design and determine the…Following on your BIG break to make a database for an… organization that organizes table tennis tournaments (also known as “Tourney”s) at their premises on behalf of clubs, you’ve written down the business rules as follows: One Match belongs to One Tourney, and not none. One Tourney has Many Matches, at least one and a maximum of 128. One Match takes place on One Table, and not none. One Table is used in Many Matches, and possibly none. One Match belongs to one Category, and not none. One Category appears in Many Matches, and possibly none and a max of 32. One Match involves Many Players, minimum 2 and maximum 4. One Player plays Many Matches, and possibly none. You have also been given a small sample of their records (which is not in the least in relational format), which may prove useful. It is below. Match Number Tourney Tourney Start Date Day Time Slot In Day Player Names(Team 1) Player Names(Team 2) Player IDs (Team 1) Player IDs(Team 2)…
- Consider a student database where the primary key is StudentID and there are indexes on Major, Age, MaritalStatus, and HomeZipCode (all secondary keys). Let's say the institution asked for a list of MIS or computer science majors who were over 25, married, and from the 45462 postcode code OR computer engineering majors who were single and from the 45462 zip code. How can indexes be used to make sure that people can only access the data that fit this requirement?Imagine you’re planning to estimate the price of the average book at your college bookstore. The bookstore carries 13,000 titles, but you plan to sample only 200 books. You will select a sample of 200 books, record the price of each book, and use the average of the 200 books to estimate the average price of the 13,000 titles in the bookstore. Assume that the bookstore can give you access to a database that lists all 13,000 titles that it carries. Based on this information, answer the following questions, thank you so much!! :)) 1. What is the sample in this study, and what is the population of interest? 2. How might you collect a simple random sample of books? 3. Choose one of the following options and discuss how you would collect that type of sample (systematic random sample, cluster sample, multistage sample, or quota sample). 4. Discuss one possible way that you could end up with a biased sample when conducting this study (hint: be sure to discuss how the sample could be…Your Division Head's point of view is as follows: "Pictures are stored in a database, and the basic design/structure we chose includes some very sensitive driver information." What if we placed it in its own folder, out of reach of people who shouldn't have access to it? What would your stance be, or, more precisely, which strategy would you prefer? It is necessary to present justification.