Oracle 1Z0-051 Question Answer

Evaluate this SQL statement:
SELECT e.emp_name, d.dept_name
FROM employees e
JOIN departments d
USING (department_id)
WHERE d.department_id NOT IN (10,40)
ORDER BY dept_name;
The statement fails when executed. Which change fixes the error?

A. remove the ORDER BY clause
B. remove the table alias prefix from the WHERE clause
C. remove the table alias from the SELECT clause
D. prefix the column in the USING clause with the table alias
E. prefix the column in the ORDER BY clause with the table alias
F. replace the condition
"d.department_id NOT IN (10,40)"
in the WHERE clause with
"d.department_id <> 10 AND d.department_id <> 40"

Answer: B


Examine the statement:
Create synonym emp for hr.employees;
What happens when you issue the statement?

A. An error is generated.
B. You will have two identical tables in the HR schema with different names.
C. You create a table called employees in the HR schema based on you EMP table.
D. You create an alternative name for the employees table in the HR schema in your own schema.

Answer: D