Computers And Technology College

Use subqueries: find the full names of all employees who are of the same gender of
their supervisor or have the same birthday as her fellow employees.
Is the query correlated or non-correlated?
What is the internal memory required?
What is the number of operations/comparisons?

Answers

Answer 1

The SQL sub queries are useful in achieving complex queries by dividing them into manageable parts. There are two types of sub queries: a correlation sub query and a non-correlated sub query. In sub query, find the full names of all employees who are of the same gender as employee_id 122.

The full names of all employees who are of the same gender as employee _id 122 are obtained using the sub query and the following query:SELECT first_name, last_name FROM employees WHERE gender = (SELECT gender FROM employees WHERE employee_id = 122)The sub query executes first, which returns a gender value based on the employee_id column that matches the employee_id of 122 in this scenario. The main query then uses this result to return the first and last names of all employees that match the gender value. Thus, in the above-mentioned sub query, the number of operations performed is two. That is, one SELECT statement inside another. A sub query is utilized to return data that will be used in the main query, and it can be included in different SQL statements, including INSERT, UPDATE, and DELETE. Furthermore, sub queries can be used with various comparison operators such as IN, NOT IN, ANY, and ALL to return various results depending on the application.

for more such question on correlation

https://brainly.com/question/28175782

#SPJ11

Related Questions

the following circuit connects the output of a comparator (u1a) to an led (d1). which of the following condition is correct? g

Answers

The following circuit connects the output of a comparator (U1A) to an LED (D1). The condition is correct.

To determine if the condition is correct, we must examine the circuit and the functionality of the components. U1A is a comparator, meaning it takes two inputs and compares them. If the input voltage of U1A is higher than the reference voltage, U1A's output will be high (1). D1 is an LED, meaning when it is activated it will produce light. In this circuit, D1 is connected to U1A's output. Therefore, if U1A's output is high, the LED will be activated, and if U1A's output is low, the LED will not be activated.

To determine if the condition is correct, we must consider the logic of the circuit. If U1A's input voltage is higher than the reference voltage, U1A's output will be high and the LED will be activated. Therefore, the given condition is correct.

For such more questions on circuit :

brainly.com/question/28655795

#SPJ11

Which of the following statements about changing requirements in software development, are correct?

Answers

The following statement about changing requirements in software development, is correct: Organizations must adapt to rapidly changing market conditions to stay relevant in business. (Option D)

What is software development?

Software development refers to the process of designing, creating, testing, and maintaining software applications, frameworks, or other software components used by computers or other devices.

The statement "Changes are acceptable till design but once development starts, any further change should be rejected" is incorrect as changes in software requirements can occur at any stage of the software development life cycle.

However, changes made later in the development cycle can be more expensive and time-consuming to implement, and they can introduce additional risks to the project.

The statement "In traditional way of software development, once the requirements are baseline, further changes can be easily accepted with light process" is also not entirely true. Any changes to baselined requirements should be subject to a formal change control process.

Learn more about software development on:

https://brainly.com/question/3188992

#SPJ1

Full Question:

Although part of your question is missing, you might be referring to this full question:


Which of the following statements about changing requirements in software development, are correct?

In traditional way of software development, once the requirements are base lined, further changes should undergo heavy change control process

Changes are acceptable till design but once development starts, any further change should be rejected

In traditional way of software development, once the requirements are base lined, further changes can be easily accepted with light process.

Organizations must adapt to rapidly changing market conditions to stay relevant in business​

FILL IN THE BLANK. In the Reno TCP when TCP enters the fast recovery if a new (non-duplicate) ACK arrives, TCP _____.

Answers

In the Reno TCP, when TCP enters the fast recovery if a new (non-duplicate) ACK arrives, TCP increments the congestion window by 1 segment instead of 1/2 segment.

The Reno TCP was the first modification of TCP that addressed congestion. It replaces the slow start and congestion avoidance algorithms with a more aggressive algorithm that speeds up the recovery process when packet loss is detected in the network. The Reno TCP is able to detect the loss of a packet by the receipt of three duplicate acknowledgments, as it believes that the sender has transmitted a packet that has been lost. The Reno TCP then changes to fast recovery mode when it detects the third duplicate acknowledgement.

The Reno TCP is an enhancement to the TCP congestion avoidance algorithm that improves its ability to handle congestion in the Internet. It is a variant of TCP that is designed to cope with network congestion by quickly responding to lost packets, rather than relying on the slow, steady approach of TCP's congestion avoidance algorithm. The Reno TCP is able to detect the loss of a packet by the receipt of three duplicate acknowledgments, as it believes that the sender has transmitted a packet that has been lost.

For such  more questions on TCP :

brainly.com/question/29848408

#SPJ11

The structures used to store data

Answers

Answer:

you can store data in list , Tuple , map and array

Explanation:

list means in the form:

list = [1,2,3,4,5]

Tuple = (1,2,3,4,5)

map = {1:2, 2:3 , 3:4}

array = [

[1,2,3,4,5]

[6,7,8,9,10]

]

difference

list is used to access the stored data by usinf the index. Tuple consider each elements as a string

map used to store connected data's like age and name of some one and acces it using either of them and areay used to store 2 dimensional data

fill in the blank. ___ are text-based systems. Users must key in commands to tell the computer what to do. The primary method of inputs is the keyboard. A mouse is not needed.

Answers

Computers are text-based systems. Users must key in commands to tell the computer what to do. The primary method of input is the keyboard; a mouse is not needed.

In order to interact with the computer, a user must input commands into the system in order to give the computer instructions. The commands are usually in the form of words, numbers, and symbols. After the user enters the command, the computer will process the command and respond accordingly. The user can then type in more commands and the computer will repeat the process until the user is finished. This method of input allows users to be very precise in their instructions, as each individual command is processed and executed by the computer.

For more such questions on Computers

https://brainly.com/question/28498043

#SPJ11

Other Questions
Use these two constants for the question that follows:e = 1.6 10^19 Ck = 8.99 10^9 N m^2/C^2A positive charge and a negative charge are 10^15 m away from each other. Using Coulomb's law, which of the following is the electrical force between these two particles? 230 N 230 N 120 N 120 N in pea plants, the allele for purple flowers, p, is dominant over the allele for white flowers, p. which conclusion about phenotype and genotype is possible?(1 point) responses A. if a plant has white flowers, then its genotype must be pp. B. if a plant has white flowers, then its genotype must be , pp, . C. if a plant has white flowers, then its genotype must be pp. D. if a plant has white flowers, then its genotype must be , pp, . E. if a plant has purple flowers, then its genotype must be pp. F. if a plant has purple flowers, then its genotype must be , pp, . G. if a plant has purple flowers, then its genotype must be pp. I need help please show your work You have been asked to work on the design of the cover of a new book. The author of the book would like to use a picture of a couple he has taken in the park. What needs to be done to use this image? write an inspiration speech Anna wants to make 30 mL of a 60 percent salt solution by mixing togethera 72 percent salt solution and a 54 percent salt solution. How much of each solution should dhe use Solve the following formula for tS=12(V0+V1)t put the following steps of inflammation into the correct order: 1. neutrophils enter and do phagocytosis 2. macrophages enter and do phagocytosis 3. mast cells release chemical mediators 4. vasodialation which structure of the ear converts sound waves into vibrations? in the right triangle round to your nearest tenth. 18 15 X help please solve the proportion 7/11=18/x+1 The velocity of money tends to increase when people have lower money balances. Which of the following would cause an increase in the velocity of money? Check all that apply. a. An increase in the rate of inflation b. A long period of low inflation V c. An increase in the frequency with which workers are paid d. An increase in the availability of interest-bearing checking accounts Which of the following sentences is grammatically correct?Cul es el horario?Qu es el horario?Cules son el horario? Writing about Esperanza Rising by Pam Muoz RyanConclusion a transition that lets your reader know that you are summarizing your thoughts in this final paragraph. a recommendation that mentions the type of audience that would most enjoy reading the material. Is it perfect for sports fans? Is it suited for fans of historical fiction? Will it appeal to people who love animals? a clincher to end your review in a memorable way. Create a final statement, positive or negative, that summarizes your thoughts. Be creative and honest. Write a final comment that perfectly wraps up your review. Type your conclusion here: According to Erikson, people who fail the adolescence stage develop _____ and enter adulthood without a solid sense of who they are or what they think is the meaning of their lives A. Guilt B. A sense of mistrust C. A sense of inferiority D. Role confusion mica wanted to demonstrate the increase in medical costs over the past ten years as compared with the increase in real income for the same period. the best visual aid to accomplish this would be a . (a) Show that if is an eigenvalue of A, then is an eigenvalue of [tex]A^{T}[/tex]. Show with an example that the eigenvectors of A and [tex]A^{T}[/tex] are not the same.(b) Show that if is an eigenvalue of A, and A is invertible, then ^-1 is an eigenvalue of A^-1. Which of the following is not one of the five questions that comprise the task of evaluating a companys resources and competitive position?A) What are the companys most profitable geographic market segments?B) How well is the companys present strategy working?C) Are the companys prices and costs competitive?D) Is the company competitively stronger or weaker than key rivals?E) What strategic issues and problems merit front-burner management attention? t/f: The IT network that allows for the movement of organizational information within that company is known as the organizational structure A decline in the number of young people joining the workforce and an increase in the number of active employees who are postponing retirement are examples of _____ forces in the general environment.