Let us consider the following relational database. Students(stulD, lastName, firstName, major, credits) Faculty(facID, name, deptName, rank) . . Classes(classNumber, facID, schedule, room) Enrolls(stulD, classNumber, grade) . . The primary keys are underlined. The referential integrity constraints are as follows: . the column facID of relation Classes that references table Faculty, . the column stulD of relation Enrolls that references table Students, and the column classNumber of relation Enrolls that references table Glasses .

Let us consider the following relational database. Students(stulD, lastName, firstName, major, credits) Faculty(facID, name, deptName, rank) . . Classes(classNumber, facID, schedule, room) Enrolls(stulD, classNumber, grade) . . The primary keys are underlined. The referential integrity constraints are as follows: . the column facID of relation Classes that references table Faculty, . the column stulD of relation Enrolls that references table Students, and the column classNumber of relation Enrolls that references table Glasses .

Database Systems: Design, Implementation, & Management

12th Edition

ISBN:9781305627482

Author:Carlos Coronel, Steven Morris

Publisher:Carlos Coronel, Steven Morris

Chapter8: Advanced Sql

Section: Chapter Questions

Problem 18RQ

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Consider a database with the following relations: Employee (Employee ID, Name, salary, startDate) Department (Department ID, Name, capacity) Project (Employee ID. Department ID, name, budget, expectedDuration) Develop the following query in SQL: Display employees (by name and salary) working on the "Engine" project and with salary higher than the average salary of all employees.
32. In a relational model, relations are termed as a. Tuples b. Attributes c. Rows d. Tables
Consider a database with the following relations: Employee (Employee ID, Name, salary, startDate) Department (Department ID, Name, capacity) Project (Employee ID, Department ID, name, budget, expectedDuration) Develop the following query in SQL: Display projects (by name and budget) done under "Marketing" department and with budget higher 100,000$.
Question 6 Inventory Database: Customers(custid, custName, address, phone, creditLimit) Orders (orderNo, order Date, totalAmount, custID) products (prodNo, prodName, unitPrice) Includes(onderNo, prodNo, orderedQantity). The primary keys are underlined. The referential integrity constraints are as follows: • the column custID of relation Orders that references table Customers, • the columns orderNo of relation Includes that references table orders, and • the column prodNo of relation Includes that references table Products. For the Inventory Database in the reference, write the SQL command to find the product numbers of all products ordered by John Smith on March 1, 2022. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). BIUS Paragraph Arial Q ΠΩ TI 10pt 田田日 A V 图用图 ↔ T @ I 26 X + 10 □ bh 三三三 E
//Last three parts not answered before 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 quantity of parts supplied on JobNo 4745. List the weight of the Part named “Left-handed screwdriver”. List the Project name and Part name of any Parts where fewer than 500 of the part has been supplied to a particular…
A) 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) a. Design a physical ER for the above scenario. b. With respect to this relative schema, write SQL statements for the subsequent queries: 1. List the name of the client United Nations agency has placed Order 123 (i.e. Order: = 123). 2. List the names of shoppers United Nations agency in Cardiff and have ordered half 456 (i.e. Part. 456). 3. List the order numbers (Order) for orders that contain a minimum of three elements and also the quantity ordered are minimum of ten. 4. 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).
Relational model: In the personal model, data are prearranged in tables, which contain of table. A data in a table is called fields. Fields in a db table are also referred as qualities of a db object. A group of related fields are called as a record, which I also called as db object or entity. A group of records are called a table. Keys in a relational db table refer to a key field. To identify each record in a table, there must be at least one data field that should be unique. That is, a corresponding data field of every record should be unique. Therefore, key field is used to identify the unique record from a collection of records.
For 1 through 4, state whether the statements are True or False (Do not provide any explanation or comment but only an answer of either True or False) A composite attribute is an attribute that is composed of several attributes. A derived attribute is an attribute whose value is calculated and not permanently stored in adatabase. Every table is a relation. Referential integrity constraint is a rule stating that no primary key column can be optional.
Let us consider the following relational database. Students(stuID, lastName, firstName, major, gpa) Faculty(facID, name, deptName, rank) Classes(classNhmber, facID, schedule, room) Enrolls(stuID, classNumber, grade) The primary keys are underlined. The referential integrity constraints are as follows: The column facID of relation Classes that references table Faculty, The column of stuID of relation Enrolls that references table Students, and The column classNumber of relation Enrolls that references table Classes. The following SQL statement is intended to define the table Students. However, this statement does not work correctly. CREAT TABLE Students( lastName VARCHAR(20), firstName VARCHAR(20), major VARCHAR(40) gpa DECIMAL(3,2), PRIMARY KEY(stuID)); However, this statement does not work correctly. Briefly explain why and list the corrected SQL statement.
15. A table is said to exhibit referential integrity if: a. it has no foreign key. b. it has a foreign key, and all the foreign key values are unique and not null. c. it has a foreign key, and all the foreign key values are referenced in another table's primary key attribute. d. it has a foreign key, which is also a component of its primary key.
Consider the relational schema for a library system as given below: Member (mem_no, name, dob) Books (isbn, title, authors, publisher) Borrowed (mem_no, isbn, date) Write the following queries in relational algebra. i. List the members who have not borrowed any books from the library. ii. Name all the books borrowed by a member named 'Ram'. ii. List the book that has been borrowed the most.
For developing our queries, we will be using the following relational schema: Student(SID, name, username, major) Course(cname, description, department, weight) Offering(OID, cname, year, term, duration) Enrolled(SID, OID, grade) A course relation is the generic description of a course which is offered by a department. The offering relation is the specific instance of a course being taught in a given term, and is the entity which will be associated with the student enrollment. Students are enrolled in these offerings and achieve a mark. Express each of following queries in Relational Algebra: | Write a relational algebra query which will list the cname and description of all the courses which are being offering in the Fall 2018 term. 2 Write a relational algebra query which will list the name of all the students who have earned 60% in both 'COSC2P12' and 'COSC2P13'.

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