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To prepare for this certification exam, candidates should have a good understanding of SQL programming concepts, such as data types, operators, functions, and control structures. They should also be familiar with basic database concepts, such as normalization, indexing, and transaction management. 1z0-071 exam consists of 73 multiple-choice questions, which need to be completed within 100 minutes. The passing score for 1z0-071 Exam is 63%. Upon successful completion of the exam, candidates will be awarded the Oracle Database SQL certification, which is a valuable credential for anyone seeking to advance their career in database management.

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Oracle Database SQL Sample Questions (Q334-Q339):

NEW QUESTION # 334
Examine the structure of the ORDERS table:

You want to find the total value of all the orders for each year and issue this command:
SQL> SELECT TO_CHAR(order_date,'rr'), SUM(order_total) FROM orders
GROUP BY TO_CHAR(order_date, 'yyyy');
Which statement is true regarding the result? (Choose the best answer.)

A. It returns an error because the TO_CHAR function is not valid.
B. It executes successfully and gives the correct output.
C. It return an error because the datatype conversion in the SELECT list does not match the data type conversion in the GROUP BY clause.
D. It executes successfully but does not give the correct output.

Answer: C

NEW QUESTION # 335
Table ORDER_ITEMS contains columns ORDER_ID, UNIT_PRICE and QUANTITY, of data type NUMBER Statement 1:
SELECT MAX (unit price*quantity) "Maximum Order FROM order items;
Statement 2:
SELECT MAX (unit price*quantity "Maximum order" FROM order items GROUP BY order id; Which two statements are true?

A. Both the statement given the same output.
B. Statement 1 returns only one row of output.
C. Statement 2 may return multiple rows of output.
D. Statement 2 returns only one row of output.
E. Both statements will return NULL if either UNIT PRICE or QUANTITY contains NULL,

Answer: B,C

NEW QUESTION # 336
Which two tasks can be performed by using Oracle SQL statements? (Choose two.)

A. changing the password for an existing database user
B. connecting to a database instance
C. querying data from tables in different databases
D. starting up a database instance
E. executing operating system (OS) commands in a session

Answer: A,C

Explanation:
References:
http://www.techonthenet.com/oracle/password.php
https://docs.oracle.com/cd/B28359_01/server.111/b28324/tdpii_distdbs.htm

NEW QUESTION # 337
Examine the structure of the SALES table. (Choose two.)

Examine this statement:

Which two statements are true about the SALES1 table? (Choose two.)

A. It will not be created because of the invalid WHERE clause.
B. It will not be created because the column-specified names in the SELECT and CREATE TABLE clauses do not match.
C. It will have NOT NULL constraints on the selected columns which had those constraints in the SALES table.
D. It is created with no rows.
E. It has PRIMARY KEY and UNIQUE constraints on the selected columns which had those constraints in the SALES table.

Answer: C,D

NEW QUESTION # 338
Examine the description or the CUSTOMERS table:

For Customers whose income level has a value, you want to display the first name and due amount as 5% of their credit limit. Customers whose due amount is null should not be displayed.
Which query should be used?

A. SELECT cust_first_name, cust_credit_limit * .05 AS DUE_AMONT FROM customers WHERE cust_income_level <> NULL AND due_amount <> NULL;
B. SELECT cust_first_name, cust_credit_limit * .05 AS DUE_AMONT FROM customers WHERE cust_income_level IS NOT NULL AND cust_credit_limit IS NOT NULL;
C. SELECT cust_first_name, cust_credit_limit * .05 AS DUE_AMONT FROM customers WHERE cust_income_level IS NOT NULL AND due_amount IS NOT NULL;
D. SELECT cust_first_name, cust_credit_limit * .05 AS DUE_AMONT FROM customers WHERE cust_income_level != NULL AND due_amount != NULL;
E. SELECT cust_first_name, cust_credit_limit * .05 AS DUE_AMOUNT FROM customers WHERE cust_income_level != NULL AND cust_credit_level != NULL;

Answer: B

Explanation:
In Oracle SQL, the correct way to check for non-null values is to use the IS NOT NULL condition. Using != NULL or <> NULL is incorrect because NULL represents the absence of any value, and you cannot use equality or inequality operators to check for NULL.
* C. SELECT cust_first_name, cust_credit_limit * .05 AS DUE_AMOUNT FROM customers WHERE cust_income_level IS NOT NULL AND cust_credit_limit IS NOT NULL; This query will correctly filter out any customers with a NULL income level or credit limit and then calculate the due amount as 5% of their credit limit for the remaining customers.
References:
* Oracle Database SQL Language Reference 12c, especially sections on conditions and expressions that deal with NULL values.

NEW QUESTION # 339
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