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Oracle 1z1-071 certification exam, also known as the Oracle Database SQL exam, is designed to test individuals' knowledge and skills in SQL programming, data modeling, and database management. Oracle Database SQL certification is intended for individuals who want to demonstrate their proficiency in working with Oracle databases and SQL programming. 1z1-071 Exam is recognized worldwide as a benchmark for Oracle SQL expertise and is highly valued by employers.

Oracle Database SQL Sample Questions (Q28-Q33):

NEW QUESTION # 28
Examine the command to create the BOOKS table.

The BOOK_IDvalue 101does not exist in the table.
Examine the SQL statement:

Which statement is true?

A. It executes successfully only if NULLis explicitly specified in the INSERTstatement.
B. It executes successfully only if the PUBLISHER_IDcolumn name is added to the columns list and NULL is explicitly specified in the INSERTstatement.
C. It executes successfully and the row is inserted with a rule PUBLISHER_ID.
D. It executes successfully only if the PUBLISHER_IDcolumn name is added to the columns list in the INSERTstatement.

Answer: C

NEW QUESTION # 29
Examine the description of the ORDERS table:

Which three statements execute successfully?

A. (SELECT * FROM orders
UNION ALL
SELECT* FROM invoices) ORDER BY order _id;
B. SELECT order_ id, order_ data FROM orders
UNION ALL
SELECT invoice_ id, invoice_ data FROM invoices ORDER BY order_ id;
C. SELECT * FROM orders ORDER BY order_ id
INTERSEOT
SELECT * FROM invoices ORDER BY invoice_ id;
D. SELECT * FROM orders
MINUS
SELECT * FROM INVOICES ORDER BY 1
E. SELECT * FROM orders ORDER BY order_ id
UNION
SELECT * FROM invoices;
F. SELECT order_ id, invoice_ data order_ date FROM orders
MINUS
SELECT invoice_ id, invoice_ data FROM invoices ORDER BY invoice_ id;
G. SELECE order _id, order _ date FRON orders
LNTERSECT
SELECT invoice_ id, invoice_ id, order_ date FROM orders

Answer: A,B,D

NEW QUESTION # 30
You must find the number of employees whose salary is lower than employee 110.
Which statement fails to do this?

A. SELECT COUNT (*)
FROM employees e
JOIN (SELECT salary FROM employees WHERE employee_id= 110) a
ON e. salary< a. salary;
B. SELECT COUNT (*)
FROM employees
JOIN employees a
ON e. salary< a. salary
WHERE a. employee_id= 110;
C. SELECT COUNT (* )
FROM employees e
WHERE e. salary < (SELECT a. salary FROM employees a WHERE e. employee_id = 110);
D. SELECT COUNT (* )
FROM employees
WHERE salary < (SELECT salary FROM employees WHERE employee_id =
110) ;

Answer: C

Explanation:
In this context, the correct answers will provide a count of employees with a salary less than that of employee with ID 110. Let's evaluate the provided statements:
A: This statement is incorrect due to a syntax error; it uses alias 'e' without defining it, and 'a' is also used incorrectly in the JOIN clause. It should have been written with proper aliases.
B: This statement is correct as it uses a subquery to find the salary of employee ID 110 and compares it to the salaries of all employees to get the count.
C: This statement is also correct as it creates a derived table with the salary of employee ID 110 and compares it with the salaries of the 'employees' table using a JOIN.
D: This is the statement that fails. It is incorrect because the subquery references 'e.employee_id = 110', which will compare the salary of each employee to themselves if their ID is 110, not to the salary of employee 110 for all employees.

NEW QUESTION # 31
View the Exhibit and examine the structure of the BOOKS table.

The BOOKS table contains details of 100 books.
Examine the commands executed and their outcome:

Which statement is true?

A. Both ROLLBACK commands restore the 100 rows that were deleted.
B. The first rollback restores the 100 rows that were deleted and the second rollback commits only the changes.
C. Both ROLLBACK commands restore the 101 rows that were deleted.
D. The first rollback restores the 101 rows that were deleted and the second rollback causes the row was inserted to be deleted and commits the changes.

Answer: D

NEW QUESTION # 32
Examine these SQL statements which execute successfully:

Which two statements are true after execution?

A. The foreign key constraint will be enabled and IMMEDIATE.
B. The primary key constraint will be enabled and DEFERRED.
C. The primary key constraint will be enabled and IMMEDIATE.
D. The foreign key constraint will be disabled.
E. The foreign key constraint will be enabled and DEFERRED.

Answer: A,B

NEW QUESTION # 33
......

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Biography

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Oracle Database SQL Sample Questions (Q28-Q33):

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Pete Lee Pete Lee

Biography

Get Latest Oracle 1z1-071 PDF Questions For Instant Success

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