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Anastasy [175]
4 years ago
5

Suppose that we have a ternaryrelationship R between entity sets A, B, and C such that (i) A has a key constraint; and (ii) Chas

a key constraintand total participation. These are the only constraints. A has attributes a1 and a2, with a1 being the key; B has attributes b1 and b2, with b1 being the key; and C has attributes c1and c2, with c1 being the key. R has no descriptive attributes. All of the above-mentioned attributes are to be stored as Strings of 10 characters. Write SQL statements that create tables corresponding to this information so as to capture as many of the constraints as possible. If you cannot capture some constraint, explain why.
Computers and Technology
1 answer:
lutik1710 [3]4 years ago
3 0
Lol i mean it could definitely be any of the choices lol i don’t have a clue lol
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Write the class definition for a class named Employee. The class should include data members for an employee object%u2019s name
kykrilka [37]

Answer:

see explaination

Explanation:

#include <iostream>

#include <string>

using namespace std;

class Employee

{

string name;

int salary;

public: Employee()

{

}

Employee(string name, int salary)

{

this->name=name;

this->salary=salary;

}

void setName(string name)

{

this->name=name;

}

void setSalary(int sal)

{

this->salary=sal;

}

string getName()

{

return name;

}

int getSalary()

{

return salary;

}

void raiseSalary(int percentage)

{

if(percentage<0)

{

cout<<"Invalid percentage";

}

else

{

salary=salary+((float)percentage/100)*salary;

}

}

};

int main()

{

int percentage;

Employee e1("Satur",1000);

cout<<"Employee details are:";

cout<<e1.getName();

cout<<e1.getSalary();

cout<<"Enter the percentage raise";

cin>>percentage;

e1.raiseSalary(percentage);

cout<<"Raise in salary:";

cout<<e1.getSalary();

return 0;

}

7 0
3 years ago
Define the following term. data, database, DBMS, database system, data- base catalog, program-data independence, user wen', DBA,
wolverine [178]

Answer:

data - Any form of value in a column of a table in a relational database.

DBMS - Short for Database management system, which is a software that can be used to create, manipulate and view databases, e.g. MS SQL Server.

database system - Same as DBMS.

database catalog - Place where the metadata of a Database, its tables, users etc. exists e.g. date created, size, number of columns etc. Also known as Data Dictionary.

program-data independence - Program-data independence refers to the capability of leaving data intact and accessible regardless of modifications to the database that contains the data.

DBA - Short for Database Administrator, person responsible for maintaining the database. Its main responsibility is to keep the data clean and safe i.e. data doesn't contain wrong or invalid data, and is safe from viruses and is backed up.

end user - Anyone who is not directly interacting with a database, but through some software like website and mobile application.

persisten object - An object of a class in a program, that interacts with the underlying database and is responsible for manipulating the database connected to.

transaction-processing system - A transaction process system is part of a software, responsible for making sure critical business transactions, like crediting or debiting money, either goes through cleanly or doesn't at all.

CRUD are the four main types of operations one can do in a database environment. It stands for creating, reading, deleting and updating.

Explanation:

4 0
3 years ago
Characteristics of VR headsets​
weeeeeb [17]
Answer Believable Virtual Word. The believable virtual world is a key characteristic of Virtual Reality. ...
Immersive. ...
Feedback. ...
Interactive. ...
Virtual Reality Headset. ...
Computing Device (Commuter / Smart Phone) ...
Virtual Reality Input and Output Devices. ...
Fully Immersive Virtual Reality.
5 0
3 years ago
The part of the poppet valve that contacts the valve seat is called the A. face. B. margin. C. head. D. stem.
Phantasy [73]
It should be A face, I think
6 0
3 years ago
Read 2 more answers
Which one of the following statements is true regarding the fetch-execute cycle? Each step of the fetch-execute cycle is perform
AfilCa [17]

Answer:

The device responsible for performing the fetch-execute cycle is the CPU.

Explanation:

The fetch execution cycle is the way or method the CPU executes instructions given to it. In this process or cycle, the CPU fetches the instruction, then decodes it, executes it, and stores the information in its database.

The CPU executes one instruction at a time.

8 0
4 years ago
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