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The Oracle 1z0-071 is a certification exam that proves the candidate’s knowledge of SQL technology and SQL concepts required to participate in any database project. The target audience for this exam is the IT professionals with some experience in working with these technologies. The fundamental knowledge of general computing concepts and command line interfaces will be an advantage as well.

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Oracle 1z0-071 exam is intended for SQL developers, database administrators, and IT professionals who work with Oracle databases. 1z0-071 exam consists of 73 multiple-choice questions that need to be completed within two hours. 1z0-071 Exam is available in several languages, including English, Japanese, and Chinese. 1z0-071 exam can be taken either in-person at a Pearson VUE testing center or online from your home or office.

Oracle Database SQL Sample Questions (Q57-Q62):

NEW QUESTION # 57
Examine the structure of the EMPLOYEEStable.

There is a parent/child relationship between EMPLOYEE_IDand MANAGER_ID.
You want to display the last names and manager IDs of employees who work for the same manager as the employee whose EMPLOYEE_IDis 123.
Which query provides the correct output?

A. SELECT e.last_name, e.manager_id
FROM employees e RIGHT OUTER JOIN employees m
on (e.employee_id = m.employee_id)
WHERE e.employee_id = 123;
B. SELECT e.last_name, m.manager_id
FROM employees e RIGHT OUTER JOIN employees m
on (e.manager_id = m.employee_id)
AND e.employee_id = 123;
C. SELECT e.last_name, m.manager_id
FROM employees e LEFT OUTER JOIN employees m
on (e.employee_id = m.manager_id)
WHERE e.employee_id = 123;
D. SELECT m.last_name, e.manager_id
FROM employees e LEFT OUTER JOIN employees m
on (e.manager_id = m.manager_id)
WHERE e.employee_id = 123;

Answer: D

NEW QUESTION # 58
These are the steps for a correlated subquery, listed in random order:
The WHERE clause of the outer query is evaluated.
A candidate row is fetched from the table specified in the outer query.
This is repeated for the subsequent rows of the table, until all the rows are processed.
Rows are returned by the inner query, after being evaluated with the value from the candidate row in the outer query.
Which is the correct sequence in which the Oracle server evaluates a correlated subquery?

A. 2, 4, 1, 3
B. 4, 2, 1, 3
C. 4, 1, 2, 3
D. 2, 1, 4, 3

Answer: A

Explanation:
http://rajanimohanty.blogspot.co.uk/2014/01/correlated-subquery.html

NEW QUESTION # 59
Examine the structure of the MARKStable:

Which two statements would execute successfully? (Choose two.)
SELECT SUM(DISTINCT NVL(subject1,0)), MAX(subject1)

A. FROM marks
WHERE student_name LIKE 'R%';
B. FROM marks
WHERE subject1 > AVG(subject1);
SELECT SUM(subject1+subject2+subject3)
C. FROM marks
WHERE student_name IS NULL;
SELECT student_name,SUM(subject1)
D. FROM marks
WHERE subject1 > subject2;
SELECT student_name subject1

Answer: C,D

NEW QUESTION # 60
View the exhibit and examine the structure of the PROMOTIONS table.

You have to generate a report that displays the promo name and start date for all promos that started after the last promo in the 'INTERNET' category.
Which query would give you the required output?

A. SELECT promo_name, promo_begin_date FROM promotionsWHERE promo_begin_date IN (SELECT promo_begin_dateFROM promotionsWHERE promo_category= 'INTERNET');
B. SELECT promo_name, promo_begin_date FROM promotionsWHERE promo_begin_date> ANY (SELECT promo_begin_dateFROM promotionsWHERE promo_category= 'INTERNET');
C. SELECT promo_name, promo_begin_date FROM promotionsWHERE promo_begin_date> ALL (SELECT MAX (promo_begin_date)FROM promotions) ANDpromo_category= 'INTERNET';
D. SELECT promo_name, promo_begin_date FROM promotionsWHERE promo_begin_date > ALL (SELECT promo_begin_dateFROM promotionsWHERE promo_category = 'INTERNET');

Answer: D

NEW QUESTION # 61
Which two statements will return the names of the three employees with the lowest salaries?

A. SELECT last_name, salary
FROM employees
WHERE ROWNUM<=3
B. SELECT last_name,salary
FROM employees
FETCH FIRST 3 ROWS ONLY
ORDER BY salary;
C. SELECT last_name,salary
FROM (SELECT * FROM employees ORDER BY salary)
D. SELECT last_name,salary
FROM employees
WHERE ROWNUM<=3
ORDER BY (SELECT salary FROM employees);
E. SELECT last_name,salary
FROM employees
ORDER BY salary
FETCH FIRST 3 ROWS ONLY;

Answer: E

Explanation:
To retrieve the names of the three employees with the lowest salaries, the correct SQL syntax and logic are crucial:
Option B:
SELECT last_name, salary FROM employees ORDER BY salary FETCH FIRST 3 ROWS ONLY; This query correctly sorts employees by their salary in ascending order and fetches the first three rows only. The FETCH FIRST n ROWS ONLY syntax is a standard way to limit the result set in SQL.
Options A, C, D, and E do not correctly implement the logic for fetching the lowest three salaries due to misuse of ROWNUM or incorrect placement of ORDER BY and FETCH clauses.

NEW QUESTION # 62
......

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