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Prerequisites

There are no official requirements for passing the Oracle 1Z0-071 exam. However, it is recommended that the students have a good grasp of SQL syntax rules. They also need to be able to use general SQL functions, identify the result of fundamental DDL operations, and know how to implement SQL statements and functions.

Oracle 1z1-071 (Oracle Database SQL) Exam is a certification exam offered by Oracle Corporation for individuals looking to demonstrate their proficiency in SQL and Oracle Database. 1z1-071 Exam is designed to test the candidate's knowledge and skills in SQL language, data modeling, database concepts, and the use of Oracle Database software. Passing 1z1-071 exam validates the candidate's ability to work with Oracle Database and SQL, making them a valuable asset to any organization that uses these technologies.

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Oracle Database SQL Sample Questions (Q344-Q349):

NEW QUESTION # 344
Which two statements are true regarding the SQL GROUP BY clause?

A. The GROUP BY clause is mandatory if you are using an aggregating function in the SELECT clause.
B. If the SELECT clause has an aggregating function, then columns without an aggregating function in the SELECT clause should be included in the GROUP BY clause.
C. You can use a column alias in the GROUP BY clause.
D. Using the WHERE clause after the GROUP BY clause excludes rows after creating groups.
E. Using the WHERE clause before the GROUP BY clause excludes rows before creating groups.

Answer: B,E

NEW QUESTION # 345
Which two are true about unused columns? (Choose two.)

A. Unused columns retain their data until they are dropped.
B. Once a column has been set to unused, a new column with the same name can be added to the table.
C. A foreign key column cannot be set to unused.
D. A primary key column cannot be set to unused.
E. A query can return data from unused columns, but no DML is possible on those columns.
F. The DESCRIBE command displays unused columns.

Answer: A,D

Explanation:
https://decipherinfosys.wordpress.com/2007/11/15/back-to-the-basics-dropping-unused-columns-in-oracle/

NEW QUESTION # 346
Examine this statement which returns the name of each employee and their manager:

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

A. FULL OUTER
B. LEFT OUTER
C. RIGHT OUTER
D. CROSS

Answer: D

NEW QUESTION # 347
View the Exhibit and examine the details of PRODUCT_INFORMATIONtable.
PRODUCT_NAME CATEGORY_ID SUPPLIER_ID
Inkjet C/8/HQ 12 102094
Inkjet C/4 12 102090
LaserPro 600/6/BW 12 102087
LaserPro 1200/8/BW 12 102099
Inkjet B/6 12 102096
Industrial 700/ID 12 102086
Industrial 600/DQ 12 102088
Compact 400/LQ 12 102087
Compact 400/DQ 12 102088
HD 12GB /R 13 102090
HD 10GB /I 13 102071
HD 12GB @7200 /SE 13 102057
HD 18.2GB @10000 /E 13 102078
HD 18.2GB @10000 /I 13 102050
HD 18GB /SE 13 102083
HD 6GB /I 13 102072
HD 8.2GB@5400 13 102093
You have the requirement to display PRODUCT_NAMEfrom the table where the CATEGORY_IDcolumn has values 12or 13, and the SUPPLIER_IDcolumn has the value 102088. You executed the following SQL statement:
SELECT product_name
FROM product_information
WHERE (category_id = 12 AND category_id = 13) AND supplier_id = 102088; Which statement is true regarding the execution of the query?

A. It would not execute because the same column has been used in both sides of the ANDlogical operator to form the condition.
B. It would execute and the output would display the desired result.
C. It would not execute because the entire WHEREclause condition is not enclosed within the parentheses.
D. It would execute but the output would return no rows.

Answer: D

NEW QUESTION # 348
View the Exhibit and examine the structure of the ORDERS table. (Choose the best answer.)

You must select ORDER_ID and ORDER_DATE for all orders that were placed after the last order placed by CUSTOMER_ID 101.
Which query would give you the desired result?

A. SELECT order_id, order_date FROM ordersWHERE order_date > ANY(SELECT order_date FROM orders WHERE customer_id = 101);
B. SELECT order_id, order_date FROM ordersWHERE order_date > IN(SELECT
order_date FROM orders WHERE customer_id = 101);
C. SELECT order_id, order_date FROM ordersWHERE order_date > ALL(SELECT order_date FROM orders WHERE customer_id = 101);
D. SELECT order_id, order_date FROM ordersWHERE order_date > ALL(SELECT MAX(order_date) FROM orders ) AND customer_id = 101;

Answer: C

NEW QUESTION # 349
......

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