The following is a list of entries with level numbers in a file of employee records: 1 Employee(200) 2 SSN(Social Security Number) 2 Name 3 Last 3 First 3 Middle Intial 2 Address 3 Street 3 Area 4 City 4 State 4 ZIP 2 Age 2 Salary 2 Dependents
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- Let's pretend you have access to a database including the names and x, y locations of a variety of eateries. For the time being, let's pretend that just the following kinds of inquiries will be made: We need to know whether there is a restaurant near this address. Which indexing system is preferable, R trees or B trees? Why?Consider a MAIL_ORDER database in which employees take orders for parts from customers. The data requirements are summarized as follows: o The mail order company has employees, each identified by a unique employee number, first and last name, and Zip Code. o Each customer of the company is identified by a unique customer num, first and last name, and Zip Code. o Each part is identified by a unique part number, a part name, price, and quantity. o Each order placed by a customer is taken by an employee and is given a unique order number. Each order contains specified quantities of one or more parts. Each order has a date of receipt as well as an expected ship date. The actual ship date is also recorded. Design an Entity-Relationship diagram for the above environment. Please indicate Cardinality Constraints and Participation ConstraintsConsider a MAIL_ORDER database in which employees take orders for parts from customers. The data requirements are summarized as follows: o The mail order company has employees, each identified by a unique employee number, first and last name, and Zip Code. o Each customer of the company is identified by a unique customer num, first and last name, and Zip Code. o Each part is identified by a unique part number, a part name, price, and quantity. o Each order placed by a customer is taken by an employee and is given a unique order number. Each order contains specified quantities of one or more parts. Each order has a date of receipt as well as an expected ship date. The actual ship date is also recorded. Design an Entity-Relationship diagram for the above environment.
- Let's pretend you have access to a database including the x, y locations and names of local eateries. Take into account just the following categories of inquiries: The inquiry seeks to ascertain whether a dining establishment may be located at a given address. Which indexing system is preferable: B-tree or R-tree? Why?The objective is to create a system that allows you to completely manage the functions of thecompany through an optimal design of the data model, to be adapted to a system connected to aSQL database. StatementThe pharmacy chain “Recetas Rayos X” needs a system to manage information about its operations, such as the purchase, sale and administration of medications, other patients and who prescribed them.a medicine. The information that must be stored is the following:1. Patients are identified by the RUT and the name, surname, date of birth, email,address, several telephone numbers and pension system.2. There are various health provisions, both social and private, and they are correctly codified.3. Doctors are identified by the RUT. For each doctor you have to store the first name, last name,date of birth, specialties and years of practice.4. There are various specialties which are adequately codified.5. Each pharmaceutical company is identified by a code, the name and a telephone…The objective is to create a system that allows you to completely manage the functions of thecompany through an optimal design of the data model, to be adapted to a system connected to aSQL database. StatementThe pharmacy chain “Recetas Rayos X” needs a system to manage information about its operations, such as the purchase, sale and administration of medications, other patients and who prescribed them.a medicine. The information that must be stored is the following:1. Patients are identified by the RUT and the name, surname, date of birth, email,address, several telephone numbers and pension system.2. There are various health provisions, both social and private, and they are correctly codified.3. Doctors are identified by the RUT. For each doctor you have to store the first name, last name,date of birth, specialties and years of practice.4. There are various specialties which are adequately codified.5. Each pharmaceutical company is identified by a code, the name and a telephone…
- Suppose you want to evaluate Josephus number. Give the idea and mechanism of a data structure which can be used to solve this problem optimally.What will be the value of Josephus number if the input is i) 13 & ii) 11? Show the solving procedure in details. [1st item will be eliminated at first eliminatio8. Matrix algebra is a theoretical way of manipulating a database. 9. The union of tables A and B is a table containing all rows that are in either table A or table B or in both table A and table B. 10. The intersection of two tables A and B is the set of all rows that are in table A but that are not in table B.1. What technique is used to model the situation that Student may have multiple addresses? A) Associative Entity (gerund)B) Weak entitiesC) Super/sub typesD) Recursive relationships 2.There is m:m relationship between students and classes. Which technique is used forrepresenting the student grade? A) Associative Entity (gerund)B) Weak entitiesC) Super/sub typesD) Recursive relationships 3. An associative Entity (gerund) may be used whenever there are data that depends on twoentities even when their relationship is 1:m. True or FalseA) TrueB) False 4. (check all that apply) When do you use recursive relationships?A) the relationship between employees and their supervisorsB) the relationship between employees and their dependentsC) the relationship between employees and their departmentsD) the relationship between employees and their team membersE) the relationship between employees and their job assignments 5. How is a gerund converted into a relational model?A) ignore the gerund in the…
- Consider the following database instance. Table name: Students Primary key: sid Sid sname 7 Ricky 2 Ellen 6 MaryLou 4 Ellen Table name: Courses Primary key: cid cid cname 1 ICS 2 Finance Table name: Register Primary key: sid,cid Foreign key: sid references Students(sid) Foreign key: cid references Courses(cid) sid cid 7 2 2 2 7 1 4 1 5.1) For each of the following statements, show whether the statement is correctly executed or not (assume that the statements are executed in order, which means that if a statement is correctly executed, its effect is reflected in the following statement). If you say the statement is not executed, explain why. INSERT INTO Students VALUES (3, ‘Ellen’); INSERT INTO Students VALUES (6, ‘Ellen’); INSERT INTO Register VALUES (1, 2); INSERT INTO Courses VALUES (5, ‘Systems’); INSERT INTO Register VALUES (6, 5); INSERT INTO Register…Consider the following database instance. Table name: Students Primary key: sid Sid sname 7 Ricky 2 Ellen 6 MaryLou 4 Ellen Table name: Courses Primary key: cid cid cname 1 ICS 2 Finance Table name: Register Primary key: sid,cid Foreign key: sid references Students(sid) Foreign key: cid references Courses(cid) sid cid 7 2 2 2 7 1 4 1 5.1) For each of the following statements, show whether the statement is correctly executed or not (assume that the statements are executed in order, which means that if a statement is correctly executed, its effect is reflected in the following statement). If you say the statement is not executed, explain why. INSERT INTO Students VALUES (3, ‘Ellen’); INSERT INTO Students VALUES (6, ‘Ellen’); INSERT INTO Register VALUES (1, 2); INSERT INTO Courses VALUES (5, ‘Systems’); INSERT INTO Register VALUES (6, 5); INSERT INTO Register…Imagine a database of students where the StudentID is the main key, and there are other indexes on Major, Age, MaritalStatus, and HomeZipCode (all secondary keys). Let's assume the institution wanted a list of MIS or computer science majors who were over 25 and married and were from the 45462 postcode code OR computer engineering majors who were single and were from the 45462 zip code. In any case, they wanted the list to come from the 45462 zip code. How can indexes be used to guarantee that individuals will only have access to the info that fulfills this prerequisite?