Object based logical model(s) are used to describe data at - [Select Appropriate Option(s)]

Related MCQs

• View the Exhibit and examine the data in the EMPLOYEES tables. Evaluate the following SQL statement: SELECT employee_id, department_id FROM employees WHERE department_id= 50 ORDER BY department_id UNION SELECT employee_id, department_id FROM employees WHERE department_id= 90 UNION SELECT employee_id, department_id FROM employees WHERE department_id= 10; What would be the outcome of the above SQL statement?
• In an object-oriented model, one object can access data of another object by passing:
• For which Exception, if a SELECT statement attempts to retrieve data based on its conditions, this exception is raised when no rows satisfy the SELECT criteria?
• Which is incorporated to create an appropriate physical database that is transformed by a logical data model:
• Which of the following is example of Object based logical model ?
• Which of these data models is an extension of the relational data model?
• What separates the physical aspects of data storage from the logical aspects of data representation?
• A physical data models are used to
• View the Exhibit and examine the structure of the EMPLOYEES and DEPARTMENTS tables. Which SET operator would you use in the blank space in the following SQL statement to list the departments where all the employees have managers? SELECT department_id FROM departments ____ SELECT department_id FROM employees WHERE manager_id IS NULL;
• Which of the following is the clause that makes a singleton SELECT different from the normal SELECT?