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Questions Bank (1398906 total)

Ce funcționalitate oferă Jaspersoft Studio pentru organizarea eficientă a informațiilor?

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During the years when the Atari 2600 VCS console dominated the home videogame market, competing consoles with superior technical capabilities such as the Intellivision and the ColecoVision were unable to gain significant market share. This is because
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Jaspersoft Studio permite generarea de rapoarte doar în format PDF.

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Schéma relationnel :

  1. Employee (EmployeeID, FirstName, LastName, Email, Phone, HireDate, Salary, #DepartmentID)
  2. Department (DepartmentID, DepartmentName, #ManagerID)
  3. Project (ProjectID, ProjectName, StartDate, EndDate, Budget)
  4. Employee_Project (#EmployeeID, #ProjectID, Role, AssignmentDate)

Explication des relations :

  • Employee (EmployeeID) est la clé primaire.
  • Department (DepartmentID) est la clé primaire.
  • Project (ProjectID) est la clé primaire.
  • Employee_Project (#EmployeeID, #ProjectID) est une clé primaire composite (relation plusieurs-à-plusieurs entre Employee et Project).
  • Employee(#DepartmentID) → Department(DepartmentID) : Un employé appartient à un département.
  • Department(#ManagerID) → Employee(EmployeeID) : Un manager est un employé.
  • Employee_Project(#EmployeeID) → Employee(EmployeeID)
  • Employee_Project(#ProjectID) → Project(ProjectID)
QUESTION

Quelle requête retourne le salaire moyen des employés ?

A) SELECT AVG(Salary) FROM Employee;

B) SELECT MEAN(Salary) FROM Employee;

C) SELECT AVG(Salary) FROM Employee GROUP BY Salary;

D) SELECT AVG(Salary) WHERE Employee HAVING Salary

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este un instrument care oferă ghiduri pas cu pas pentru crearea de rapoarte în Jaspersoft Studio.

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Relational Schema:

Employee (EmployeeID, FirstName, LastName, Email, Phone, HireDate, Salary, #DepartmentID)

Department (DepartmentID, DepartmentName, #ManagerID)

Project (ProjectID, ProjectName, StartDate, EndDate, Budget)

Employee_Project (#EmployeeID, #ProjectID, Role, AssignmentDate)

Explanation of Relationships:

  • Employee (EmployeeID) is the primary key.
  • Department (DepartmentID) is the primary key.
  • Project (ProjectID) is the primary key.
  • Employee_Project (#EmployeeID, #ProjectID) is a composite primary key (many-to-many relationship between Employee and Project).
  • Employee(#DepartmentID) REFERENCES Department(DepartmentID): An employee belongs to a department.
  • Department(#ManagerID) REFERENCES Employee(EmployeeID): A manager is an employee.
  • Employee_Project(#EmployeeID) REFERENCES Employee(EmployeeID)
  • Employee_Project(#ProjectID) REFERENCES Project(ProjectID)
QUESTION
Which query selects employees whose salary is greater than at least one employee in department 2?

A) SELECT * FROM Employee WHERE Salary > ANY (SELECT Salary FROM Employee WHERE DepartmentID = 2);

B) SELECT * FROM Employee WHERE Salary > (SELECT MAX(Salary) FROM Employee WHERE DepartmentID = 2);

C) SELECT * FROM Employee WHERE Salary = ALL (SELECT Salary FROM Employee WHERE DepartmentID = 2);

D) SELECT * FROM Employee WHERE Salary < (SELECT Salary FROM Employee WHERE DepartmentID = 2);

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Utilizarea parametrilor dinamici în rapoarte poate îmbunătăți performanța acestora.

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Ціна товару була підвищена на 25 %. Укажи, на скільки відсотків необхідно зменшити нову ціну товару, щоб одержати початкову

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When firms compete to supply homogeneous products and have similar cost structures, pure price competition drives firm profits down to zero. A firm can mitigate this outcome by
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