Consider the following expressions, which use the result of a relational algebra operation as the input to another operation. For each expression, explain in words what the expression does. a. year 2009 (takes) b. year 2009 (takes C. student student) ID.name, course_id (student takes)
Q: The organisation of the object-oriented design approaches that are used should put more focus on…
A: Definition: The method of object-oriented decomposition as well as a notation for expressing the…
Q: When written out in full, what does GSM stand for? The little SIM card is an essential part of…
A: In Europe and other parts of the world, many mobile phone customers use the GSM (Global System for…
Q: What does "interdependence" entail in relation to other concepts used to describe systems?
A: Interdependence means that the complex systems depend on the other systems to be able to operate.
Q: The way Ubuntu Server looks and feels sets it apart from competing server operating systems.
A: Encryption: The server of operating system known as Ubuntu Server was developed by Canonical and…
Q: Describe at least four ways that you use ICT on a daily basis.
A: Since we live in the information age, the importance of information and communication technology…
Q: What does "interdependence" entail in relation to other concepts used to describe systems?
A: The question has been answered in step2
Q: How does Ubuntu differ from rival server operating systems, and what makes it unique?
A: Answer: Introduction: Ubuntu is the open-source Graphical User Interface, which is used in laptops,…
Q: Focus on the individuals and occasions that influenced the creation of the information system as you…
A: Given: Discuss the evolution of information systems while focusing on the significant people and…
Q: What is the status of technology now, and what kinds of systems are available?
A: Technology: Information technology is essential to our lives because it helps us cope with the…
Q: For what reasons is the Internet considered a model of ICT? Both the explanation and the…
A: ICT is an abbreviation for information and communication technology (ICT) ICT is built on new forms…
Q: Investigate the problems that data systems face using data and technology.
A: Introduction: This inquiry explores the challenges that information systems encounter as a result of…
Q: Does choosing "good enough" quality in software development offer any advantages or disadvantages?
A: Answer : Yes , It provide advantage to development team. Choosing the quality software , helps to…
Q: When it comes to a local area network, what precautions should be taken to ensure its availability…
A: Introduction: A LAN is a collection of tiny computers or other workstation devices connected by a…
Q: Because of its distinctive features and capabilities, the Ubuntu Server Operating System stands out…
A: The answer of the question is given below
Q: What is a violation of the DRY principle? Where may they typically be found?
A: Introduction: Violations of the DRY principle: WET (Write Every Time) and AHA (Avoid Hasty…
Q: Is there any evidence to suggest that interrupt-driven operating systems outperform non-interrupted…
A: An interrupt-free operating system depends on each task or driver doing a bit of processing and then…
Q: When and why do ict's benefits and drawbacks become apparent to the public?
A: The answer of the question is given below
Q: Consider the following function: def rate(n): i = 0 total = 0 while i true) * 10 times (i.e. 10…
A: The given function is: def rate(n): i=0 total=0 while i<20: total…
Q: The context in which object-oriented analysis and design may be used, such as in the case of system…
A: Object Oriented Analysis and Design The majority of developers are familiar with the ideas behind…
Q: What characteristics distinguish Ubuntu Server from other server operating systems?
A: Introduction: Ubuntu is a Linux-based operating system. It is designed for usage with network…
Q: It is important to examine the relative advantages of synchronous data replication and partitioning.
A: Synchronous data replication is defined as the process of storing duplicates of comparable data on…
Q: (c) Write structure declaration name product to store information data as below. 1. country (string)…
A:
Q: This is the situation as a consequence of the current computers' rising power. How can the…
A: The answer of the question is given below
Q: Focus on the individuals and occasions that influenced the creation of the information system as you…
A: Please find the answer below :
Q: Use the following cell phone airport data speeds (Mbps) from a particular network. Find Upper Q 3…
A: The formula for finding a value corresponding to given percentile is as follows: c= n.p/100 Where n=…
Q: The organisation of the object-oriented design approaches that are used should put more focus on…
A: Start: Object-oriented design is method of the design that encompasses the process of…
Q: There are several issues that must be addressed while working with wireless networks. You'll need to…
A: It's infuriating when you're unable to connect to your wifi network. Worse still, the reasons for…
Q: Consider these five moral guiding principles for comp systems
A: Introduction: Below describe the Consider these five moral guiding principles for computer systems.
Q: Do you know of any good Windows Service Control Manager tutorials or reference materials?
A: Introduction: The Service a Control Manager (SCM) is one of the numerous features that are included…
Q: The way Ubuntu Server looks and feels sets it apart from competing server operating systems.
A: Encryption: The server of operating system known as Ubuntu Server was developed by Canonical and…
Q: Think about how you may describe processes that aren't addressed in a systems analysis using…
A: the solution is an given below :
Q: Does choosing "good enough" quality in software development offer any advantages or disadvantages?
A: Introduction: One of the criteria for designing software and computer systems is the "good enough"…
Q: Explain the key components of a distributed database.
A: A compilation of facts that is relevant; The specifics are broken down into numerous different…
Q: Determine the main benefits and challenges offered by information systems in Ghana's educational…
A: Introduction: The educational business benefits fundamentally from information technology. When…
Q: Show via examples why interrupt-driven operating systems perform better overall than…
A: Introduction: This question implies that interrupt-driven operating systems perform better than…
Q: According to certain hypotheses, the growth of information technologies may be fueled by people and…
A: In the digital era, this is an important means to achieve the development of information technology.
Q: This article will provide an in-depth overview of Windows Service Control Manager.
A: Introduction: SCM: The Windows NT family of operating systems has a special system feature called…
Q: Global positioning system is shortened to "GSM." Why do you need a SIM card for your cell phone?
A: Given: We have to discuss Global positioning system is shortened to GSM. Why do you need a SIM…
Q: This is feasible because of the capability of modern computers. How and why have computers become so…
A: Computers have been important since their beginnings, but they are now omnipresent; as a result of…
Q: Talk about non-systems analytical procedures using structured language.
A: Structured English: All logic is written in structured English, with decisions, iterations, and case…
Q: To comprehend how it works, try describing processes that aren't part of systems analysis using…
A: Introduction: Systems analysis is the course of an individual concentrating on a system to evaluate,…
Q: To what extent do virtual private networks (VPNs) improve on the safety of public Internet…
A: you have asked too many questions so as per Bartleby Guideline I am answering the question below
Q: When it comes to communications, why is network design so important?
A: Answer - In the network design process we make plans and blueprint the design of the network. From…
Q: To comprehend how it works, try describing processes that aren't part of systems analysis using…
A: English with a structure: All reasoning is articulated in organized English utilising case…
Q: Use object-oriented design when it makes sense to do so. Structured design is a suitable option when…
A: Define: Objects are used in computer languages. Object-oriented programming includes hiding and…
Q: t is the similarities and differences of account in cry rebillio
A: Lets see the solution.
Q: This article will provide an in-depth overview of Windows Service Control Manager.
A: Given: The Windows NT series of operating systems has a special system feature called Service…
Q: xists a certain class of candidate system that may be used in the construc
A: Introduction: A candidate management system (CMS), also known as an applicant tracking system (ATS),…
Q: encryption could be a problem for application-le andling encrypted payloads via an application-
A: End-to-end encryption (E2EE) is a system of correspondence where just the conveying users can peruse…
Q: Give some concrete examples of the differences between the operationalization of objective and…
A: Give some concrete examples of the differences between the operationalization of objective and…
Step by step
Solved in 4 steps with 4 images
- For each of the following pairs of expressions, give instances of relations thatshow the expressions are not equivalent. ΠA(r − s) and ΠA(r) − ΠA(s).2) Write SQL query that returns the Name of ALL employees (based on EMP_LNAME and EMP_FNAME in EMPLOYEE table, call this EMP_NAME), Gender of ALL employees (based on EMP_TITLE in EMPLOYEE table, call this EMP_NAME), and Pilot ratings if any (PIL_RATINGS in PILOT table). Output: EMP_NAME EMP_GENDER Rhett VanDam M John Lange M Jeanine Duzak FWhich of the following can be the output of an operation in relational algebra?(a) An attribute(b) A relation(c) An expression(d) All of the above
- Exercise 3: Procedural SQLWrite the following PSM functions or proceduresa) Take a price as argument and return the model number of the PC whose price isclosest.b) Take a maker and model as arguments, and return the price of whatever type ofproduct that model is.Write expressions of relational algebra to answer the following queries:. a) Write an SQL query to find the manufacturer and model for all aircraft models with capacity at least 300. b) write a relational algebra expression which is equivalent to the above query. c) Write an SQL query to find the names of the airlines that have at least 10 Boeing 737 in their fleet. d) What is the result of the natural join of the following two tables: Airlines and Fleet
- Design the SQL-statements that are used as a basis tocreate the original reports and other queries that includethe following (at least):- A SELECT using an inequality- A SELECT using LIKE on a text field- A SELECT on a DATE column- A query using GROUP BY- A query using HAVING- A query using ORDER BY- A query using a subquery- A query using a correlated subquery- A query involving COUNT(*)- A query involving another aggregate function - A selective DELETE- A selective UPDATEWrite SQL statements for following:Student( Enrno, name, courseId, emailId, cellno)Course(courseId, course_nm, duration)i) Add a column city in student table.ii) Find out list of students who have enrolled in “computer” course.iii) List name of all courses with their duration.iv) List name of all students start with „a‟.v) List email Id and cell no of all mechanical engineering studentsThe following normal form preserves all functional dependencies A. 4NF B. 3NF C. BCNF D. 2NF
- In the SQL Oracle Application Write one query to return the employee_id, job_id, hire_date, and department_id of all employees and a second query listing employee_id, job_id, start_date, and department_id from the job_history table and combine the results as one single output. Make sure you suppress duplicates in the output.a: Draw relational model b: Normalize upto 3NFRepeat Exercise 4, but this time use the EXISTS operator in your query.