Section 1
	(Answer all questions in this section)

		11. 	 The EMPLOYEES table contains these columns:
LAST_NAME VARCHAR2(20)
FIRST_NAME VARCHAR2(20)
HIRE_DATE DATE
EVAL_MONTHS NUMBER(3)

Evaluate this SELECT statement:

SELECT hire_date + eval_months
FROM employees;

The values returned by this SELECT statement will be of which data type?

 Mark for Review
(1) Points


	DATE (*)


	NUMBER


	DATETIME


	INTEGER



		 Correct


		12. 	 Which of the following SQL statements will correctly display the last name and the number of weeks employed for all employees in department 90?	 Mark for Review
(1) Points


	SELECT last_name, (SYSDATE-hire_date)/7 AS WEEKS
FROM employees
WHERE department_id = 90;
(*)



	SELECT last name, (SYSDATE-hire_date)/7 DISPLAY WEEKS
FROM employees
WHERE department id = 90;


	SELECT last_name, # of WEEKS
FROM employees
WHERE department_id = 90;


	SELECT last_name, (SYSDATE-hire_date)AS WEEK
FROM employees
WHERE department_id = 90;



		 Correct


		13. 	 You want to create a report that displays all orders and their amounts that were placed during the month of January. You want the orders with the highest amounts to appear first. Which query should you issue?	 Mark for Review
(1) Points


	SELECT orderid, total
FROM orders
WHERE order_date LIKE '01-jan-02' AND '31-jan-02'
ORDER BY total DESC;


	SELECT orderid, total
FROM orders
WHERE order_date IN ( 01-jan-02 , 31-jan-02 )
ORDER BY total;


	SELECT orderid, total
FROM orders
WHERE order_date BETWEEN '01-jan-02' AND '31-jan-02'
ORDER BY total DESC;
(*)



	SELECT orderid, total
FROM orders
WHERE order_date BETWEEN '31-jan-02' AND '01-jan-02'
ORDER BY total DESC;



		 Correct


		14. 	 Which script displays '01-MAY-04' when the HIRE_DATE value is '20-MAY-04'?	 Mark for Review
(1) Points


	SELECT TRUNC(hire_date, 'MONTH')
FROM employee;
(*)



	SELECT ROUND(hire_date, 'MONTH')
FROM employee;


	SELECT ROUND(hire_date, 'MON')
FROM employee;


	SELECT TRUNC(hire_date, 'MI')
FROM employee;



		 Correct


		15. 	 You issue this SQL statement:
SELECT TRUNC(751.367,-1) FROM dual;
Which value does this statement display?

 Mark for Review
(1) Points


	700


	750 (*)


	751


	751.3



		 Correct


		16. 	 You issue this SQL statement:
SELECT ROUND (1282.248, -2) FROM dual;
What value does this statement produce?

 Mark for Review
(1) Points


	1200


	1282


	1282.25


	1300 (*)



		 Correct




	Section 4
	(Answer all questions in this section)

		17. 	 Which statement about the COUNT function is true?	 Mark for Review
(1) Points


	The COUNT function ignores duplicates by default.


	The COUNT function always ignores null values by default. (*)


	The COUNT function can be used to find the maximum value in each column.


	The COUNT function can be used to determine the number of unique, non-null values in a column.



		 Correct


		18. 	 Evaluate this SQL statement:
SELECT COUNT (amount)
FROM inventory;

What will occur when the statement is issued?

 Mark for Review
(1) Points


	The statement will return the greatest value in the INVENTORY table.


	The statement will return the total number of rows in the AMOUNT column.


	The statement will replace all NULL values that exist in the AMOUNT column.


	The statement will count the number of rows in the INVENTORY table where the AMOUNT column is not null. (*)



		 Correct


		19. 	 Evaluate this SELECT statement:
SELECT COUNT(*)
FROM products;

Which statement is true?

 Mark for Review
(1) Points


	The number of rows in the table is displayed. (*)


	The number of unique PRODUCT_IDs in the table is displayed.


	An error occurs due to an error in the SELECT clause.


	An error occurs because no WHERE clause is included in the SELECT statement.



		 Correct


		20. 	 Group functions can avoid computations involving duplicate values by including which keyword?	 Mark for Review
(1) Points


	NULL


	DISTINCT (*)


	SELECT


	UNLIKE

Section 1
	(Answer all questions in this section)

		1. 	 You need to display each employee's name in all uppercase letters. Which function should you use?	 Mark for Review
(1) Points


	CASE


	UCASE


	UPPER (*)


	TOUPPER



		 Correct


		2. 	 Which SQL function can be used to remove heading or trailing characters (or both) from a character string?	 Mark for Review
(1) Points


	LPAD


	CUT


	NVL2


	TRIM (*)



		 Incorrect. Refer to Section 1 Lesson 1.


		3. 	 Which SQL function is used to return the position where a specific character string begins within a larger character string?	 Mark for Review
(1) Points


	CONCAT


	INSTR (*)


	LENGTH


	SUBSTR



		 Correct


		4. 	 You need to display the number of characters in each customer's last name. Which function should you use?	 Mark for Review
(1) Points


	LENGTH (*)


	LPAD


	COUNT


	SUBSTR



		 Correct


		5. 	 The PRICE table contains this data:
PRODUCT_ID	MANUFACTURER_ID
86950	59604

You query the database and return the value 95. Which script did you use?

 Mark for Review
(1) Points


	SELECT SUBSTR(product_id, 3, 2)
FROM price
WHERE manufacturer_id = 59604;
(*)



	SELECT LENGTH(product_id, 3, 2)
FROM price
WHERE manufacturer_id = 59604;


	SELECT SUBSTR(product_id, -1, 3)
FROM price
WHERE manufacturer_id = 59604;


	SELECT TRIM(product_id, -3, 2)
FROM price
WHERE manufacturer_id = 59604;



		 Correct


		6. 	 You query the database with this SQL statement:
SELECT CONCAT(last_name, (SUBSTR(LOWER(first_name), 4))) "Default Password"
FROM employees;

Which function will be evaluated first?

 Mark for Review
(1) Points


	CONCAT


	SUBSTR


	LOWER (*)


	All three will be evaluated simultaneously.



		 Correct


		7. 	 You issue this SQL statement:
SELECT INSTR ('organizational sales', 'al')
FROM dual;

Which value is returned by this command?

 Mark for Review
(1) Points


	1


	2


	13 (*)


	17



		 Correct


		8. 	 Evaluate this SELECT statement:
SELECT LENGTH(email)
FROM employee;

What will this SELECT statement display?

 Mark for Review
(1) Points


	The longest e-mail address in the EMPLOYEE table


	The email address of each employee in the EMPLOYEE table


	The number of characters for each value in the EMAIL column in the employees table (*)


	The maximum number of characters allowed in the EMAIL column



		 Correct


		9. 	 You need to display the number of months between today's date and each employeeﾒs hiredate. Which function should you use?	 Mark for Review
(1) Points


	ROUND


	BETWEEN


	ADD_MONTHS


	MONTHS_BETWEEN (*)



		 Correct


		10. 	 Evaluate this SELECT statement:
SELECT SYSDATE + 30
FROM dual;

Which value is returned by the query?

 Mark for Review
(1) Points


	The current date plus 30 hours.


	The current date plus 30 days. (*)


	The current date plus 30 months.


	No value is returned because the SELECT statement generates an error.



		 Correct

	Section 4
	(Answer all questions in this section)

		21. 	 Group functions return a value for ________________ and ________________ null values in their computations.	 Mark for Review
(1) Points


	a row set, ignore (*)


	each row, ignore


	a row set, include


	each row, include



		 Correct


		22. 	 Which aggregate function can be used on a column of the DATE data type?	 Mark for Review
(1) Points


	AVG


	MAX (*)


	STDDEV


	SUM



		 Correct


		23. 	 The AVG, SUM, VARIANCE, and STDDEV functions can be used with which of the following?	 Mark for Review
(1) Points


	Only numeric data types (*)


	Integers only


	Any data type


	All except numeric



		 Correct


		24. 	 Which group functions below act on character, number and date data types? (Choose more than one answer)	 Mark for Review
(1) Points

			(Choose all correct answers)


	SUM


	MAX (*)


	MIN (*)


	AVG


	COUNT (*)



		 Correct


		25. 	 The VENDORS table contains these columns:
VENDOR_ID NUMBER Primary Key
NAME VARCHAR2(30)
LOCATION_ID NUMBER
ORDER_DT DATE
ORDER_AMOUNT NUMBER(8,2)

Which two clauses represent valid uses of aggregate functions for this table?

 Mark for Review
(1) Points

			(Choose all correct answers)


	FROM MAX(order_dt)


	SELECT SUM(order_dt)


	SELECT SUM(order_amount) (*)


	WHERE MAX(order_dt) = order_dt


	SELECT MIN(AVG(order_amount)) (*)



		 Incorrect. Refer to Section 4 Lesson 2.


		26. 	 Which group function would you use to display the highest salary value in the EMPLOYEES table?	 Mark for Review
(1) Points


	AVG


	COUNT


	MAX (*)


	MIN



		 Correct


		27. 	 You need to compute the total salary for all employees in department 10. Which group function will you use?	 Mark for Review
(1) Points


	MAX


	SUM (*)


	VARIANCE


	COUNT



		 Correct




	Section 2
	(Answer all questions in this section)

		28. 	 A correlated subquery is evaluated _____ for each row processed by the parent statement.	 Mark for Review
(1) Points


	EVERY TIME


	ONCE (*)


	COMPLETELY



		 Correct


		29. 	 The WITH clause enables a SELECT statement to define the subquery block at the start of the query, process the block just once, label the results, and then refer to the results multiple times. True or False?	 Mark for Review
(1) Points


	True (*)


	False



		 Correct


		30. 	 Which statement is false?	 Mark for Review
(1) Points


	The WITH clause retrieves the results of one or more query blocks


	The WITH clause decreases performance (*)


	The WITH clause makes the query simple to read


	The WITH clause stores the results for the user who runs the query



		 Correct

					Section 2
	(Answer all questions in this section)

		31. 	 A correlated subquery will _______ a candidate row from an outer query, _______ the inner query using candidate row value, and _______ values from the inner query to qualify or disqualify the candidate row.	 Mark for Review
(1) Points


	CREATE; EXECUTE; USE


	DELETE; UPDATE; INSERT


	GET; EXECUTE; USE (*)


	ROLLUP; GRANT; DROP



		 Correct


		32. 	 Which three statements concerning explicit data type conversions are true? (Choose three.)	 Mark for Review
(1) Points

			(Choose all correct answers)


	Use the TO_NUMBER function to convert a number to a character string.


	Use the TO_DATE function to convert a character string to a date value. (*)


	Use the TO_NUMBER function to convert a character string of digits to a number. (*)


	Use the TO_DATE function to convert a date value to character string or number.


	Use the TO_CHAR function to convert a number or date value to character string. (*)



		 Correct


		33. 	 Which functions allow you to perform explicit data type conversions?	 Mark for Review
(1) Points


	ROUND, TRUNC, ADD_MONTHS


	LENGTH, SUBSTR, LPAD, TRIM


	TO_CHAR, TO_DATE, TO_NUMBER (*)


	NVL, NVL2, NULLIF



		 Correct


		34. 	 The EMPLOYEES table contains these columns:
EMPLOYEE_ID NUMBER(9)
LAST_NAME VARCHAR2 (25)
FIRST_NAME VARCHAR2 (25)
SALARY NUMBER(6)
You need to create a report to display the salaries of all employees. Which script should you use to display the salaries in format: "$45,000.00"?

 Mark for Review
(1) Points


	SELECT TO_CHAR(salary, '$999,999')
FROM employees;


	SELECT TO_NUM(salary, '$999,990.99')
FROM employees;


	SELECT TO_NUM(salary, '$999,999.00')
FROM employees;


	SELECT TO_CHAR(salary, '$999,999.00')
FROM employees;
(*)




		 Correct


		35. 	 Which arithmetic operation will return a numeric value?	 Mark for Review
(1) Points


	TO_DATE('01-JUN-2004') - TO_DATE('01-OCT-2004') (*)


	NEXT_DAY(hire_date) + 5


	SYSDATE - 6


	SYSDATE + 30 / 24



		 Correct


		36. 	 Which two statements concerning SQL functions are true? (Choose two.)	 Mark for Review
(1) Points

			(Choose all correct answers)


	Character functions can accept numeric input.


	Not all date functions return date values. (*)


	Number functions can return number or character values.


	Conversion functions convert a value from one data type to another data type. (*)


	Single-row functions manipulate groups of rows to return one result per group of rows.



		 Correct


		37. 	 The EMPLOYEES table contains these columns:
EMPLOYEE_ID NUMBER(9)
LAST_NAME VARCHAR2 (25)
FIRST_NAME VARCHAR2 (25)
HIRE_DATE DATE

You need to display HIRE_DATE values in this format:

January 28, 2000

Which SELECT statement could you use?

 Mark for Review
(1) Points


	SELECT TO_CHAR(hire_date, Month DD, YYYY)
FROM employees;


	SELECT TO_CHAR(hire_date, 'Month DD, YYYY')
FROM employees;
(*)



	SELECT hire_date(TO_CHAR 'Month DD', ' YYYY')
FROM employees;


	SELECT TO_CHAR(hire_date, 'Month DD', ' YYYY')
FROM employees;



		 Correct




	Section 3
	(Answer all questions in this section)

		38. 	 Which statement about a self join is true?	 Mark for Review
(1) Points


	The NATURAL JOIN clause must be used.


	Table aliases must be used to qualify table names. (*)


	Table aliases cannot be used to qualify table names.


	A self join must be implemented by defining a view.



		 Incorrect. Refer to Section 3 Lesson 4.


		39. 	 Which SELECT statement implements a self join?	 Mark for Review
(1) Points


	SELECT p.part_id, t.product_id
FROM part p, part t
WHERE p.part_id = t.product_id;
(*)



	SELECT p.part_id, t.product_id
FROM part p, product t
WHERE p.part_id = t.product_id;


	SELECT p.part_id, t.product_id
FROM part p, product t
WHERE p.part_id = t.product_id (+);


	SELECT p.part_id, t.product_id
FROM part p, product t
WHERE p.part_id =! t.product_id;



		 Incorrect. Refer to Section 3 Lesson 4.


		40. 	 Evaluate this SELECT statement:
SELECT *
FROM employee e, employee m
WHERE e.mgr_id = m.emp_id;
Which type of join is created by this SELECT statement?

 Mark for Review
(1) Points


	a self join (*)


	a cross join


	a left outer join


	a full outer join



		 Correct
Section 3
	(Answer all questions in this section)

		41. 	 Which type of join returns rows from one table that have NO direct match in the other table?	 Mark for Review
(1) Points


	Equijoin


	Self join


	Outer join (*)


	Natural join



		 Correct


		42. 	 You need to join the EMPLOYEE_HIST and EMPLOYEES tables. The EMPLOYEE_HIST table will be the first table in the FROM clause. All the matched and unmatched rows in the EMPLOYEES table need to be displayed. Which type of join will you use?	 Mark for Review
(1) Points


	A cross join


	An inner join


	A left outer join


	A right outer join (*)



		 Incorrect. Refer to Section 3 Lesson 3.


		43. 	 Which two sets of join keywords create a join that will include unmatched rows from the first table specified in the SELECT statement?	 Mark for Review
(1) Points


	LEFT OUTER JOIN and FULL OUTER JOIN (*)


	RIGHT OUTER JOIN and LEFT OUTER JOIN


	USING and HAVING


	OUTER JOIN and USING



		 Correct


		44. 	 Below find the structures of the PRODUCTS and VENDORS tables:
PRODUCTS
PRODUCT_ID NUMBER
PRODUCT_NAME VARCHAR2 (25)
VENDOR_ID NUMBER
CATEGORY_ID NUMBER

VENDORS
VENDOR_ID NUMBER
VENDOR_NAME VARCHAR2 (25)
ADDRESS VARCHAR2 (30)
CITY VARCHAR2 (25)
REGION VARCHAR2 (10)
POSTAL_CODE VARCHAR2 (11)

You want to create a query that will return an alphabetical list of products, including the product name and associated vendor name, for all products that have a vendor assigned. Which two queries could you use?

 Mark for Review
(1) Points

			(Choose all correct answers)


	SELECT p.product_name, v.vendor_name
FROM products p
LEFT OUTER JOIN vendors v
ON p.vendor_id = v.vendor_id
ORDER BY p.product_name;


	SELECT p.product_name, v.vendor_name
FROM products p
JOIN vendors v
ON (vendor_id)
ORDER BY p.product_name;


	SELECT p.product_name, v.vendor_name
FROM products p
NATURAL JOIN vendors v
ORDER BY p.product_name;
(*)



	SELECT p.product_name, v.vendor_name
FROM products p
JOIN vendors v
USING (p.vendor_id)
ORDER BY p.product_name;


	SELECT p.product_name, v.vendor_name
FROM products p
JOIN vendors v
USING (vendor_id)
ORDER BY p.product_name;
(*)




		 Incorrect. Refer to Section 3 Lesson 2.


		45. 	 The primary advantages of using JOIN ON is: (Select two)	 Mark for Review
(1) Points

			(Choose all correct answers)


	The join happens automatically based on matching column names and data types.


	It will display rows that do not meet the join condition.


	It permits columns with different names to be joined. (*)


	It permits columns that donﾒt have matching data types to be joined. (*)



		 Correct


		46. 	 Which of the following statements is the simplest description of a nonequijoin?	 Mark for Review
(1) Points


	A join condition containing something other than an equality operator (*)


	A join condition that is not equal to other joins.


	A join condition that includes the (+) on the left hand side.


	A join that joins a table to itself



		 Correct


		47. 	 Which keyword in a SELECT statement creates an equijoin by specifying a column name common to both tables?	 Mark for Review
(1) Points


	A HAVING clause


	The FROM clause


	The SELECT clause


	A USING clause (*)



		 Correct


		48. 	 Evaluate this SELECT statement:
SELECT a.lname || ', ' || a.fname as "Patient", b.lname || ', ' || b.fname as "Physician", c.admission
FROM patient a
JOIN physician b
ON (b.physician_id = c.physician_id)
JOIN admission c
ON (a.patient_id = c.patient_id);

Which clause generates an error?

 Mark for Review
(1) Points


	JOIN physician b


	ON (b.physician_id = c.physician_id); (*)


	JOIN admission c


	ON (a.patient_id = c.patient_id)



		 Incorrect. Refer to Section 3 Lesson 2.


		49. 	 For which condition would you use an equijoin query with the USING keyword?	 Mark for Review
(1) Points


	You need to perform a join of the CUSTOMER and ORDER tables but limit the number of columns in the join condition. (*)


	The ORDER table contains a column that has a referential constraint to a column in the PRODUCT table.


	The CUSTOMER and ORDER tables have no columns with identical names.


	The CUSTOMER and ORDER tables have a corresponding column, CUST_ID. The CUST_ID column in the ORDER table contains null values that need to be displayed.



		 Correct


		50. 	 You created the CUSTOMERS and ORDERS tables by issuing these CREATE TABLE statements in sequence:
CREATE TABLE customers
(custid varchar2(5),
companyname varchar2(30),
contactname varchar2(30),
address varchar2(30),
city varchar2(20),
state varchar2(30),
phone varchar2(20),
constraint pk_customers_01 primary key (custid));

CREATE TABLE orders
(orderid varchar2(5) constraint pk_orders_01 primary key,
orderdate date,
total number(15),
custid varchar2(5) references customers (custid));

You have been instructed to compile a report to present the information about orders placed by customers who reside in Nashville. Which query should you issue to achieve the desired results?

 Mark for Review
(1) Points


	SELECT custid, companyname
FROM customers
WHERE city = 'Nashville';


	SELECT orderid, orderdate, total
FROM orders o
NATURAL JOIN customers c ON o.custid = c.custid
WHERE city = 'Nashville';


	SELECT orderid, orderdate, total
FROM orders o
JOIN customers c ON o.custid = c.custid
WHERE city = 'Nashville';
(*)



	SELECT orderid, orderdate, total
FROM orders
WHERE city = 'Nashville';



		 Incorrect. Refer to Section 3 Lesson 2.