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Question 1:

Which three statements are true about views in an Oracle database?

A. A SELECT statement cannot contain a where clause when querying a view containing a WHERE clause in its defining query

B. Rows inserted into a table using a view are retained in the table if the view is dropped

C. Views can join tables only if they belong to the same schema.

D. Views have no segment.

E. Views have no object number.

F. A view can be created that refers to a non-existent table in its defining query.

Correct Answer: BDF

Question 2:

Examine the description of the EMPLOYEES table:

Which statement will execute successfully, returning distinct employees with non-null first names?

A. SELECT DISTINCT * FROM employees WHERE first_ name IS NOT NULL;

B. SELECT first_ name, DISTINCT last_ name FROM employees WHERE first_ name IS NOT NULL;

C. SELECT Distinct * FROM employees WHERE first_ name < > NULL;

D. SELECT first_ name, DISTINCT last_ name FROM employees WHERE first_ name < > NULL;

Correct Answer: A

Question 3:

Examine the description of the transactions table:

Which two SQL statements execute successfully?

A. SELECT customer_id AS “CUSTOMER-ID”, transaction_date AS DATE, amount+100 “DUES” from transactions;

B. SELECT customer_id AS \’CUSTOMER-ID\’,transaction_date AS DATE, amount+100 \’DUES\’ from transactions;

C. SELECT customer_id CUSTID, transaction_date TRANS_DATEamount+100 DUES FROM transactions;

D. SELECT customer_id AS “CUSTOMER-ID”, transaction_date AS “DATE”, amount+100 DUES FROM transactions;

E. SELECT customer id AS CUSTOMER-ID, transaction_date AS TRANS_DATE, amount+100 “DUES AMOUNT” FROM transactions;

Correct Answer: CD

Question 4:

Examine the data in the NEW_EMPLOYEES table:

Examine the data in the EMPLOYEES table: You want to:

1.

Update existing employee details in the EMPLOYEES table with data from the NEW EMPLOYEES table.

2.

Add new employee detail from the NEW_ EMPLOYEES able to the EMPLOYEES table.

Which statement will do this:

A. MERGE INTO employees e USING new employees ne WHERE e.employee_id = ne. employee_ id WHEN MATCHED THEN UPDATE SET e.name = ne. name, e.job_id = ne.job_id,e.salary =ne. salary WHEN NOT MATCHED THEN INSERT VALUES (ne. employee_id,ne.name, ne.job_id,ne.salary) ;

B. MERGE INTO employees e USING new_employees n ON (e.employee_id = ne.employee_id) WHEN MATCHED THEN UPDATE SET e.name = ne. name, e.job id = ne.job_id,e.salary =ne. salary WHEN NOT MATCHED THEN INSERT VALUES (ne. employee_id,ne.name,ne.job_id,ne.salary);

C. MERGE INTO employees e USING new employees ne ON (e.employee_id = ne.employee_id) WHEN FOUND THEN UPDATE SET e.name =ne. name, e.job_id=ne.job_id, e.salary =ne.salary WHEN NOT FOUND THEN INSERT VALUES (ne.employee_id,ne.name,ne.job_id,ne.salary) ;

D. MERGE INTO employees e USING new_employees n WHERE e.employee_id = ne.employee_id WHEN FOUND THEN UPDATE SET e.name=ne.name,e.job_id =ne.job_id, e.salary=ne.salary WHEN NOT FOUND THEN INSERT VALUES (ne. employee_ id,ne. name,ne. job id,ne. salary) ;

Correct Answer: B

Question 5:

You execute the following commands:

SQL > DEFINE hire date = \’01-APR-2011\’

SQL >SELECT employee_id, first_name, salary

FROM employees

WHERE hire_date > \’andhiredate\’

AND manager_id > andmgr_id;

For Which substitution variables are you prompted for the input?

A. none, because no input is required

B. both the substitution variables \’\’hiredate\’ and \’mgr_id\’.

C. only hiredate\’

D. only \’mgr_id\’

Correct Answer: D

Question 6:

Examine the structure of the EMPLOYEES table.

There is a parent/child relationship between EMPLOYEE_ID and 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_ID is 123.

Which query provides the correct output?

A. 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;

B. 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;

C. 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;

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;

Correct Answer: D

Question 7:

Examine the description of the EMPLOYEES table:

Which two queries return rows for employees whose manager works in a different department?

A. SELECT emp. * FROM employees emp WHERE manager_ id NOT IN ( SELECT mgr.employee_ id FROM employees mgr WHERE emp. department_ id < > mgr.department_ id );

B. SELECT emp.* FROM employees emp WHERE NOT EXISTS ( SELECT NULL FROM employees mgr WHERE emp. manager id = mgr. employee_ id AND emp.department_id<>mgr.department_id );

C. SELECT emp.* FROM employees emp LEFT JOIN employees mgr ON emp. manager_ id = mgr. employee_ id AND emp. department id < > mgr. department_ id;

D. SELECT emp. * FROM employees emp RIGHT JOIN employees mgr ON emp. manager_ id = mgr. employee id AND emp. department id <> mgr.department_ id WHERE emp. employee_ id IS NOT NULL;

E. SELECT emp. * FROM employees emp JOIN employees mgr ON emp. manager_ id = mgr. employee_ id AND emp. department_ id<> mgr.department_ id;

Correct Answer: DE

Question 8:

Which three statements are true about Structured Query Language (SQL)?

A. It guarantees atomicity, consistency, isolation, and durability (ACID) features

B. It best supports relational databases

C. It is used to define encapsulation and polymorphism for a relational table

D. It requires that data be contained in hierarchical data storage

E. It is the only language that can be used for both relational and object-oriented databases

F. It provides independence for logical data structures being manipulated from the underlying physical data storage

Correct Answer: ABF

Question 9:

Examine this SQL statement: SELECT cust_id, cus_last_name “Last Name” FROM customers WHERE country_id = 10 UNION SELECT cust_id CUST_NO, cust_last_name FROM customers WHERE country_id = 30 Identify three ORDER BY clauses, any one of Which can complete the query successfully.

A. ORDER BY 2, 1

B. ORDER BY “CUST_NO”

C. ORDER BY 2,cust_id

D. ORDER BY CUST_NO

E. ORDER BY “Last Name”

Correct Answer: ACE

Question 10:

Examine the description of the EMPLOYEES table:

Which query requires explicit data type conversion?

A. SELECT SUBSTR(join date, 1, 2) – 10 FROM employees;

B. SELECT join_ date + \’20\’ EROM employees;

C. SELECT join_ date`\’ salary FROM employees;

D. SELECT join _ date FROM employees WHERE join date > *10-02-2018\’;

E. SELECT salary + \’120.50\’ FROM employees;

Correct Answer: D

Question 11:

Examine the description of the CUSTOMERS table:

Which two SELECT statements will return these results:

CUSTOMER_ NAME

Mandy

Mary

A. SELECT customer_ name FROM customers WHERE customer_ name LIKE \’ % a % \’ ;

B. SELECT customer_ name FROM customers WHERE customer name LIKE \’Ma%\’ ;

C. SELECT customer_ name FROM customers WHERE customer_ name=\’*Ma*\’;

D. SELECT customer_ name FROM customers WHERE UPPER (customer_ name ) LIKE \’MA*. ;

E. SELECT customer_ name FROM customers WHERE customer name LIKE \’Ma*\’;

F. SELECT customer_ name FROM customers WHERE UPPER (customer name) LIKE \’ MAand\’;

G. SELECT customer_ name FROM customers WHERE customer_ name KIKE .*Ma*\’;

Correct Answer: AB

Question 12:

View the exhibit and examine the description of the PRODUCT_INFORMATION table.

Which SQL statement would retrieve from the table the number of products having LIST_PRICE as NULL?

A. SELECT COUNT (DISTINCT list_price) FROM product_information WHERE list_price is NULL

B. SELECT COUNT (NVL(list_price, 0)) FROM product_information WHERE list_price is NULL

C. SELECT COUNT (list_price) FROM product_information WHERE list_price i= NULL

D. SELECT COUNT (list_price) FROM product_information WHERE list_price is NULL

Correct Answer: B

Question 13:

Which two are true about the USING clause when joining tables?

A. All column names in a USING clause must be qualified with a table name or table alias.

B. It can never be used with a natural join.

C. It is used to specify an equijoin of columns that have the same name in both tables.

D. It can never be used with a full outer join.

E. It is used to specify an explicit join condition involving operators.

Correct Answer: BE

Question 14:

Examine This Statement Which returns the name of each employee and their manager,

SELECT e.last name AS emp, m.last_name AS mgr

FROM employees e JOIN managers m

ON e.manager_ id = m. employee_ id ORDER BY emp;

You want to extend the query to include employees with no manager. What must you add before JOIN to do this?

A. CROSS

B. FULL OUTER

C. LEFT OUTER

D. RIGHT OUTER

Correct Answer: C

Question 15:

Examine this command:

TRUNCATE TABLE test;

Table truncated.

Which two are true? (Choose two.)

A. The structure of the TEST table is removed.

B. All the indexes on the TEST table are dropped.

C. All the constraints on the TEST table are dropped.

D. Removed rows can not be recovered using the ROLLBACK command.

E. All the rows in the TEST table are removed.

Correct Answer: AC

…

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