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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. The EMP table has these columns:

Management wants a list of names of employees who have been with the company for more than five years. Which SQL statement displays the required results?

A) SELECT ENAME FROM EMP WHERE (SYSDATE-HIRE_DATE)* 365 > 5;
B) SELECT ENAME FROM EMP WHERE HIRE_DATE-SYSDATE > 5;
C) SELECT ENAME FROM EMP WHERE (SYSDATE-HIRE_DATE)/365 > 5;
D) SELECT ENAME FROM EMP WHERE SYSDATE-HIRE_DATE > 5;

2. You need to display the last names of those employees who have the letter "A" as the second character in their names.
Which SQL statement displays the required results?

A) SELECT last_name FROM EMP WHERE last name ='_A%';
B) SELECT last_name FROM EMP WHERE last name LIKE '*A%'
C) SELECT last_name FROM EMP WHERE last_name LIKE '_A%';
D) SELECT last_name FROM EMP WHERE last name ='*A%'

3. Which substitution variable would you use if you want to reuse the variable without prompting the user each time?

A) ACCEPT
B) PROMPT
C) &&
D) &

4. Examine the structure of the EMPLOYEES and DEPARTMENTS tables:

You want to create a report displaying employee last names, department names, and locations. Which query should you use to create an equi-join?

A) SELECT e.last_name, d.department_name, d.location_id
FROM employees e, departments D
WHERE manager_id =manager_id;
B) SELECT last_name, department_name, location_id
FROM employees , departments ;
C) SELECT employees.last_name, departments.department_name,
departments.location_id
FROM employees e, departments D
WHERE e.department_id =d.department_id;
D) SELECT e.last_name, d.department_name, d.location_id
FROM employees e, departments D
WHERE e.department_id =d.department_id;

5. You need to perform certain data manipulation operations through a view called EMP_DEPT_VU, which you previously created.
You want to look at the definition of the view (the SELECT statement on which the view was create.)
How do you obtain the definition of the view?

A) Use the DESCRIBE VIEW command on the EMP_DEPT VU view.
B) Query the USER_OBJECTS data dictionary view to search for the EMP_DEPT_VU view.
C) Use the DESCRIBE command in the EMP_DEPT VU view.
D) Query the USER_VIEWS data dictionary view to search for the EMP_DEPT_VU view.
E) Use the DEFINE VIEW command on the EMP_DEPT VU view.
F) Query the USER_SOURCE data dictionary view to search for the EMP_DEPT_VU view.

Solutions: