a complex view cannot contain any group functionsT/F
Answers
False. A complex view can contain group functions such as COUNT, SUM, AVG, MAX, and MIN.
Explanation:
1. A view in a database is a virtual table created by a query. It doesn't physically store data but retrieves it from one or more underlying tables.
2. A complex view is a view that is created using a SELECT statement that joins multiple tables, uses subqueries or aggregates data using group functions.
3. Group functions, such as SUM, AVG, COUNT, MAX, MIN, are used to perform calculations on a set of rows and return a single result.
4. In a complex view, group functions can be used to summarize data and return aggregated results for each group or category.
5. For example, a complex view can be created to show the total sales for each product category, using the SUM function to aggregate the sales data.
Therefore, a complex view can contain group functions, and they are often used to create useful summaries of data in the database. However, it's important to note that some database systems have restrictions on the use of group functions in views and may require certain conditions or clauses to be included in the query to ensure correct results.
Know more about the database systems click here:
https://brainly.com/question/31113501
#SPJ11
Related Questions
Given that the system function of a third order Butterworth type analog low-pass filter with a 3 dB cut-off frequency of 2 radian/second is:
2s HS = S2 + 0.2 s +1
Answer the following questions:
1. Use the bilinear transformation to obtain H(z). Use T=2 second.
2. Give H(w) for your filter.
3. Use MATLAB to give the magnitude spectrum.
4. Comment on the quality of the design.
5. With the aid of simple sketch graphs explain how frequency warping affects the frequency response of the digital filter.
6. Comment on the need for prewarping, i.e. give conditions when prewarping is needed.
Answers
answer
d just too the test
Tech a says both oem and tcmc brake pad kits come with new shims. Tech b says tcmc products have a 13 digit part number instead of the traditional 10 digits. Who is correct?
Answers
suppose you work for a company name a and that company is building a computer network, and you are asked to develop a scheme for dealing with the deadlock problem. a. would you use a deadlock-detection scheme or a deadlock prevention scheme? b. if you used a deadlock-prevention scheme, which one would you use? explain your choice. c. if you used a deadlock-detection scheme, which one would you use? explain your choice.
Answers
a. In this scenario,I would use a deadlock-prevention scheme.
b. One common deadlock-prevention scheme is the "Resource Allocation Graph" (RAG) method.
c. If I were to use a deadlock-detection scheme, I would consider the "Banker's Algorithm."
How is this so?a. I would use a deadlock-prevention scheme because it focuses on eliminating the conditions that lead to deadlocks, reducing the chances of them occurring.
b. I chose the Resource Allocation Graph (RAG)method as it provides a structured approach to prevent deadlocks by managing resource allocation effectively.
c. If I were to use a deadlock-detection scheme, the Banker's Algorithmis a suitable choice as it can identify potential deadlocks by analyzing resource allocation requests and ensuring safe state conditions are met.
Learn more about deadlock at:
https://brainly.com/question/33328343
#SPJ4
The machine language file is loaded onto the robot where the files can run test written as part of the program called __________________.
Answers
Answer:
C++ and Python
Explanation:
C++ and Python
An improvement of an existing technological product, system, or method of doing something is known as a(n)
A. innovation
B. invention
C. product
Answers
An improvement of an existing technological product, system, or method of doing something is known as innovation.
What is innovation?
Innovation is the process of creating new or improved products, services, processes, or ideas that benefit an organization or society. It involves introducing new ideas, methods, and products, or improving existing ones. Innovation can include a wide range of activities, such as research and development, technology transfer, and commercialization. In a business setting, it often involves introducing new products and services, developing new processes, and improving the efficiency of existing ones. Innovation can also involve introducing new ways of working, such as customer service, marketing, and analytics. Ultimately, innovation helps organizations remain competitive and achieve success.
To learn more about innovation
https://brainly.com/question/30755063
#SPJ4
The alternator is considered to be a part of your car's _______ system:_____.
a. fuel
b. suspension
c. electrical
d. ignition
Answers
Answer:
C
Explanation:
The alternator generates electricity to power headlights/radio/windows etc and charge the battery.
The inverted U-tube is used to measure the pressure difference between two points A and B in an inclined pipeline through which water flows. The differenceof level h=0.4m ; X=0.2; and Y=0.3m. Calculate the pressure difference between point B and A if the top of the manometer is filled with:
i) Air
ii) paraffin of relative density of 0.75
Answers
Answer:
i) 0.610 m or 610 mm
ii) 0.4 m or 400 mm
Explanation:
The pressure difference between the pipes is
a) Air
Pa + πha +Ha = Pb + πhb +Hb
Pa - Pb = π(hb-ha) + Hb-Ha
Relative density of air = 1.2754 kg /m3
Pa - Pb = 1.2754 * 0.4 + (0.3-0.2) = 0.610 m or 610 mm
b) paraffin of relative density of 0.75
Pa - Pb = π(hb-ha) + Hb-Ha
Pa - Pb = 0.75 * 0.4 + (0.3-0.2) = 0.4 m or 400 mm
What is troubleshooting?
creating a checklist
finding and fixing a problem
scanning for viruses
performing regular maintenance
Answers
Answer:
B. finding and fixing a problem
Explanation: is correct on edge2020
Please hit that thanks button below and mark brainliest if possible
A shunt regulator utilizing a zener diode with an incremental resistance of 8 ohm is fed through an 82-Ohm resistor. If the raw supply changes by 1.0 V, what is the correspondig change in the regulated outut voltage?
Answers
Answer:
\(\triangle V_0=0.08V\)
Explanation:
From the question we are told that:
Incremental resistance \(R=8ohms\)
Resistor Feed \(R_f=82ohms\)
Supply Change \(\triangle V=1\)
Generally the equation for voltage rate of change is mathematically given by
\(\frac{dV_0}{dV}=\frca{R}{R_1r_3}\)
Therefore
\(\triangle V_0=\triangle V*\frac{R}{R_fR}\)
\(\triangle V_0=1*\frac{8}{8*82}\)
\(\triangle V_0=0.08V\)
For what type of metal is high speed steel drill best suited?
Answers
I believe it would be high speed steel
Answer:
high speed steel I believe
An engineer wants to obtain a random sample of the output of a process manufacturing digital cameras. She samples on three different days, and on each day she selects five cameras at random between 3 P.M. and 4 P.M from the production line output. Is this a random sample?
Answers
Yes, this is a random sample. By selecting cameras from the production line output at random times on three different days, the engineer is ensuring that the sample will be random.
What is engineer?
Engineering is a profession that involves the application of scientific principles for the purpose of designing, building, and maintaining structures, machines, and other products. It is also a field of study that involves the analysis and use of mathematics, physics, and other sciences to solve problems. Engineering requires knowledge of mathematics, science, and engineering fundamentals, as well as problem-solving and critical thinking skills. Engineers must also be able to communicate their ideas and results effectively, both in written and oral forms. Engineering involves the design and construction of structures, machines, and systems, as well as the development of new materials, processes, and products.
To learn more about engineer
https://brainly.com/question/28717367
#SPJ4
The efficiency of a steam power plant can beincreased by bleeding off some of the steam thatwould normally enter the turbine and usingit topreheat the water entering the boiler. In this process,liquid water at 50oC and 1000 kPa is mixed withsuperheated steam at 200oC and 1000 kPa. If the plantoperators want to produce a saturated liquid at 1000kPa, what ratio of mass flow rates of water andsuperheatedsteam are required
Answers
Answer:
Explanation:
This is Answer....
Toyotas more than 30 hybrid vehicles investment in zero emissions vehicle and working on developing hydrogen fuel cell vehicles not only protect the natural environment but also further his overall economic progress customer is generally has positive feelings towards companies that focus on______ efforts such as Toyotas
Answers
The missing term in the presented paragraph is environmental.
In recent years the effects of climate change have been strongly manifested around the world causing:
Forest firesFloodsHeatwavesCold wavesSnowfallThe rise in the level of rivers and seasDeglaciationTherefore, many companies have begun to investigate productive alternatives to reduce their environmental impact. In the case of the car industry, companies have deepened their research on other sources of energy such as:
ElectricSolarWindOne of them is Toyota, the Japanese brand that has developed cars that work hybrid, that is, with gasoline and electric power. This will reduce the emissions of CO2 and other harmful gases into the atmosphere.
Therefore, it is possible to infer that the missing term in the paragraph is Environmental.
Learn more in: https://brainly.com/question/9427437
list five pieces of personal safety equipment which must be in everyday use in the workshop
Answers
Answer:
safety glasses, hearing protection, respirator, work gloves, and work boots.
Explanation:
please give brainliest!! <3
ch21 8. a customer complains that the heater works sometimes, but sometimes only cold air comes out while driving. technician a says that the water pump is defective. technician b says that the cooling system could be low on coolant. who is right?
Answers
Technician A is correct. technician a says that the water pump is defective.
Frequently asked questions include "Why is my central air not working?" The most frequent causes of central air conditioning system failure are coolant running out too quickly, clogged or unclean air filters, frozen coils, and electrical problems. While there is a remote possibility that there is a problem with your engine's operating temperature, a broken thermostat is by far the most frequent cause of trouble code P0128. Returning liquid can lead to compressor failure even though it may appear to be a straightforward problem.
Learn more about engine here-
https://brainly.com/question/27960749
#SPJ4
what is the condition for sampling frequency to reconstruct the information signal ?
Answers
A continuous time-varying 1-D signal is sampled by narrow sampling pulses at a regular rate fr = 1/T, which must be at least twice the bandwidth of the signal. At first, it may be somewhat surprising that the original waveform can be reconstructed exactly from a set of discrete samples.
What would decrease the resistance of wires carrying an electric current?
shorter wires
Look at the diagram showing resistance and flow of electrons.
Which labels best complete the diagram?
NOT
X: Flow of electrons
Y: High potential energy
Z: Low potential energy
Potential difference is measured in units called ___________.
.
Volts
Why is copper used for most electrical wiring?
It is a good conductor.
Measurements of two electric currents are shown in the chart.
Which best compares the two currents?
Current Y has a greater potential difference, and the charges flow at a slower rate.
Which lists types of materials from most conductive to least conductive?
NOT
insulator,
semiconductor,
conductor,
superconductor
In the diagram, the arrow shows the movement of electric charges through a wire connected to a battery.
What causes the electric charges to flow from one end of the battery to the other?
a difference in electric potential
Which most likely has the greatest conductivity?
a cool lead metal strip
Jodi made a list about electric current to help her study for a test.
1) Movement of electrons is continuous in a current.
2) Electrons move from areas of low to high electric potential.
3) Voltage causes current to flow.
4) Rate at which current flows is measured in amperes.
Which best describes Jodi's error?
Electrons move from areas of high to low electric potential.
Which two wire properties would provide the greatest resistance to the flow of a current?
long, thin
Answers
Because it is an excellent conductor, copper is used for the majority of electrical wiring, and shorter cables reduce the resistance of wires carrying an electric current.
1)smaller wires
2)NOT X: Electron flow
Y: Lots of potential energy
Z: Minimal potential energy
3)Volts
4) It has strong conductivity.
5) The charges move more slowly in current Y because of the larger potential difference.
6)NOT
insulator,
semiconductor,
conductor,
superconductor
7)Differences in electric potential
8) a cold slice of lead metal
9) Electrons flow between regions with high and low electric potential.
10) long and lean
The copper produced by electrolysis is known as pure copper or electrolytic copper. Numerous types of electrical wiring use copper as its electrical conductor. Electricity is produced, transmitted, and distributed via copper wire in telecommunications, electronic circuits, and a variety of other electrical devices.
Learn more about Wires here:
https://brainly.com/question/13550678
#SPJ4
Technician A says that all-wheel drive vehicles are the same as four-wheel drive vehicles. Technician B says that front-wheel drive drivetrains are the most common on cars today. Who is correct?
Answers
According to the question, Technician B is correct because he said that front-wheel drive drivetrains are the most common on cars today.
What is the responsibility of the technician?The responsibility of the technician includes analysis and service of the system, diagnosing the actual problems, performing troubleshooting, testing and running of equipment, repairing or replacing faulty or damaged equipment, etc.
According to the context of this question, technician A conveyed that all-wheel drive vehicles are the same as four-wheel drive vehicles. This is actually not accurate and valid. This is because all-wheel drive vehicles are not the same as four-wheel drive vehicles. It significantly depends on the circumference of the wheel.
Therefore, technician B is correct because he said that front-wheel drive drivetrains are the most common on cars today.
To learn more about Technicians, refer to the link:
https://brainly.com/question/18428188
#SPJ1
in a work situation where an electrician’s hands get wet while operating a 120-volt, corded drill, which of the following would be true?
Answers
12. in an undisturbed soil formation, it is known that the dry unit weight is 18.06 kn/m3 . the specific gravity of the soil particles is 2.75. a. what is the saturated wet unit weight of the soil in kn/m3 unit? b. what is the submerged effective weight of the soil in kn/m3 unit?
Answers
Unit Weight in Bulk For many top soils, this is typically 15 kN/m3, although it can range from 11 kN/m3 for a loose, dry soil to 18 kN/m3 for a dense, moist soil.
What is soil formation?Soil is built on minerals found in the soil. They are created from rocks (the parent material) by the natural erosive and weathering processes. Parent material is dissolved with the assistance of water, wind, gravity, temperature variation, chemical reactions, living things, and pressure variations. Pedogenesis, also known as soil creation, is the process of soil genesis as it is influenced by site, environment, and history. The biogeochemical processes in soils have the power to either generate or destroy order.The following factors, according to scientists, contribute to the creation of soil: parent material, climate, biota (organisms), terrain, and time. In Minnesota, these elements combine to create about 1,108 distinct soil series.To learn more about soil formation, refer to:
https://brainly.com/question/1042747
#SPJ4
Water discharging into a 10-m-wide rectangular horizontal channel from a sluice gate is observed to have undergone a hydraulic jump. The flow depth and velocity before the jump are 0.8m and 7m/s, respectively. Determine (a) the flow depth and the Froude number after the jump (b) the head loss (c) the dissipation ratio.
Answers
Answer:
A) Flow depth = 2.46 m, Froude number after jump = 0.464
B) head loss = 0.572 m
C) dissipation ratio = 0.173
Explanation:
Given data :
Velocity before jump ( v1 ) = 7 m/s
flow depth before jump ( y1 ) = 0.8 m
g = 9.81 m/s
Esi = 3.3 m ( calculated )
attached below is a detailed solution of the problem
A plant might be emitting some dangerous pollutants that are environmentally harmful, but completely eliminating them would be so expensive that the plant would have to close, throwing many local inhabitants out of work. Assuming there is an obligation both to preserve jobs and to protect the environment. What is the best technique that should be used to resolve this problem?
Select one:
a. The convergence and divergence techniques
b. The Utilitarian approach
c. The creative middle way
d. The line drawing technique
Answers
Answer: c. The creative middle way
Explanation:
As there is both an obligation to preserve jobs and to protect the environment, a creative middle way which involves compromise would be most effective.
The company involved should process and remove the worst pollutants alone while leaving others so that the process will not be so expensive that they have to close down.
They will do this till a better and more environmentally beneficial solution can be found at which point they can then clean up the previous pollutants with the hope that they have not irrecoverably damaged the environment.
Hey guys can anyone list chemical engineering advancement that has been discovered within the past 20 years
Answers
Nanopesticides. The world population keeps growing. ...
Enantio selective organocatalysis. ...
Solid-state batteries. ...
Flow Chemistry. ...
Porous material for Water Harvesting. ...
Directed evolution of selective enzymes. ...
From plastics to monomers. ...
1)A wheel is used to turn a valve stem on a water valve. If the wheel radius is 1 foot and the stem, (axle), radius is .5 inches, what is the mechanical advantage of the wheel and axle? 2)How much resistance force can ideally be overcome when an effort of 80 lbs is applied to the wheel of the water valve in problem 1? 3)What is the linear distance traveled when a 2.5' diameter wheel makes one revolution? 4)A compressor motor has a 1.00 inch output shaft (axle) that drives a 4.00inch pulley (wheel). If the motor output shaft supplies 24 lbs of force, ideally how much force does the pulley apply to the drive belt wrapped around it? 5) If the belt pulley's force is measured to be 4 lbs, what is the AMA wheel and axle here?6) What is the efficiency of the compressor motor – belt pulley wheel and axle?
Answers
Answer:
for 13
Explanation:
''.''
A heat engine is a device able to transform work into heat.
a. True
b. False
Answers
Answer:
Option B: False
Explanation:
A heat engine is a device which operates in a manner that heat is converted into mechanical work.
A simple example of a heat engine is a drinking bird. The oscillatory motion of the drinking bird is as a result of the thermal expansion and contraction of a chemical compound in its beak, which creates an imbalance in its position of equilibrium. This causes it to oscillate.
Heat engines usually work by extracting heat once there is a temperature gradient available in the system and using it to perform work. Another good example is the internal combustion engine. It extracts heat from the explosion of the burning fuels and uses it to power the car.
In a voltage-divider biased pnp transistor, there is no base current, but the base voltage is approximately correct. The most likely problem(s) is
Answers
Answer:
the base-emitter junction is open and the emitter resistor is open
Explanation:
Because here there will be no base current only when the the base emitter junction is kept open and. Also when emitter resistor is kept open or with thus there will be no voltage drop across the Resistor meaning the base voltage Will be equal to that in the voltage divider circuitry
A 1.2 newton block is dropped A 1.2 Newton block is dropped downward from a tall cliff. What is the magnitude and direction
of the force of air friction on the block when it reaches its terminal velocity?
1.2 newtons upward
1.2 newtons downward
0.12 newtons upward
0.12 newtons downward
Answers
Answer:
1.2 Newtons upwards
Explanation:
because the friction is opposite of the magnitude.
A piece of equipment with the capability to be programmed to perform quick and accurate operations multiple times
Answers
The equipment you're referring to is likely a programmable machine or controller. It can be programmed to perform tasks quickly and accurately multiple times. This improves efficiency and productivity in industries that use them.
Definition and Applications of Programmable MachinesThe piece of equipment you are referring to is likely a programmable machine or a programmable controller. This could be a computer, a microcontroller, or a specialized device such as a programmable logic controller (PLC) or a robotic arm.
These machines are designed to be programmed to perform specific tasks, and they can execute these tasks quickly and accurately, often much faster than a human could. They can also repeat these tasks multiple times with consistent precision, which is important for many industrial and manufacturing applications.
Programmable machines can be programmed using a variety of programming languages, depending on the specific machine and application. Some common languages used for programming these machines include ladder logic, structured text, and C/C++. The programming language used will depend on the specific application and the capabilities of the machine being programmed.
To know more about programmable machine, visit: https://brainly.com/question/30517954
#SPJ4
6.03 Discussion: Then & Now - Safety
Discussion Topic
I'm Done
In this unit, you have learned about the evolution of the industry’s machines, through both technology and innovation. These improvements have reduced risk and injury to the Operating Engineers.
Choose one innovation or device.
Explain why you think that technology is the most important advancement in Operating Engineers’ safety.
Answers
Answer:
Information technology is important in our lives because it helps to deal with every day's dynamic things. Technology offers various tools to boost development and to exchange information. Both these things are the objective of IT to make tasks easier and to solve many problems.
to do you blur text in google docs
Answers
Answer:
I dont think you can blur text in google docs