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The Oracle 1z0-071 exam covers topics such as SQL fundamentals, data manipulation, data definition, and control and management of transactions. It is a comprehensive exam that tests the candidate's ability to work with Oracle databases and write SQL queries.

Oracle 1z0-071 Exam is a computer-based exam consisting of 73 multiple-choice questions. Candidates have 105 minutes to complete the exam, and the passing score is 63%. 1z0-071 exam is available in several languages, including English, Japanese, Spanish, and Portuguese.

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Oracle 1z0-071 Certification Exam is designed for SQL developers, database administrators, and database analysts who want to validate their knowledge and skills in SQL. 1z0-071 exam covers the basics of SQL, including data manipulation, data definition, and data control language. It also includes advanced topics such as subqueries, set operators, and data aggregation.

Oracle Database SQL Sample Questions (Q237-Q242):

NEW QUESTION # 237
View the Exhibit and examine PRODUCTS and ORDER_ITEMS tables.

You executed the following query to display PRODUCT_NAME and the number of times the product has been ordered:
SELECT p.product_name, i.item_cnt
FROM (SELECT product_id, COUNT (*) item_cnt
FROM order_items
GROUP BY product_id) i RIGHT OUTER JOIN products p
ON i.product_id = p.product_id;
What would happen when the above statement is executed?

A. The statement would not execute because inline views and outer joins cannot be used together.
B. The statement would not execute because the ITEM_CNT alias cannot be displayed in the outer query.
C. The statement would not execute because the GROUP BY clause cannot be used in the inline.
D. The statement would execute successfully to produce the required output.

Answer: D

NEW QUESTION # 238
View the exhibit and examine the data in ORDERS_MASTERand MONTHLY_ORDERStables.

Evaluate the following MERGEstatement:
MERGE_INTO orders_master o
USING monthly_orders m
ON (o.order_id = m.order_id)
WHEN MATCHED THEN
UPDATE SET o.order_total = m.order_total
DELETE WHERE (m.order_total IS NULL)
WHEN NOT MATCHED THEN
INSERT VALUES (m.order_id, m.order_total)
What would be the outcome of the above statement?

A. The ORDERS_MASTERtable would contain the ORDER_IDs1 and 2.
B. The ORDERS_MASTERtable would contain the ORDER_IDs1, 2, 3 and 4.
C. The ORDERS_MASTERtable would contain the ORDER_IDs1, 2 and 4.
D. The ORDERS_MASTERtable would contain the ORDER_IDs1, 2 and 3.

Answer: C

Explanation:
Explanation/Reference:
References:
https://docs.oracle.com/cd/B28359_01/server.111/b28286/statements_9016.htm

NEW QUESTION # 239
Examine the structure of the CUSTOMERS table: (Choose two.)

CUSTNO is the PRIMARY KEY.
You must determine if any customers' details have been entered more than once using a different CUSTNO, by listing all duplicate names.
Which two methods can you use to get the required result?

A. Self-join
B. Left outer-join with self-join
C. Full outer-join with self-join
D. Right outer-join with self-join
E. Subquery

Answer: A,E

NEW QUESTION # 240
Examine the description of the CUSTOMERS table:

You want to display details of all customers who reside in cities starting with the letter D followed by at least two character.
Which query can be used?

A. SELECT * FROM customers WHERE city LIKE'D %';
B. SELECT * FROM customers WHERE city ='D_%';
C. SELECT * FROM customers WHERE city LIKE'D_';
D. SELECT * FROM customers WHERE city ='%D_';

Answer: B

Explanation:
The LIKE operator is used in SQL to search for a specified pattern in a column. To find all customers residing in cities starting with 'D' followed by at least two characters, you need to use the LIKE operator with the appropriate wildcard pattern:
A . SELECT * FROM customers WHERE city LIKE 'D_%'; The underscore () wildcard character in SQL represents a single character. The percent (%) wildcard character represents zero or more characters. So 'D%' will match any city starting with 'D' followed by at least one character (as there is one underscore).
Reference:
Oracle Database SQL Language Reference 12c, specifically the section on pattern matching with the LIKE condition.

NEW QUESTION # 241
Which three statements are true regarding indexes?

A. An update to a table can result in updates to any or all of the table's indexes.
B. A SELECT statement can access one or more indices without accessing any tables.
C. A table belonging to one user can have an index that belongs to a different user,
D. An update to a table can result in no updates to any of the table's indexes.
E. A UNIQUE index can be altered to be non-unique.
F. When a table is dropped and is moved to the RECYCLE BIN, all Indexes built on that table are permanently dropped.

Answer: A,B,E

Explanation:
Indexes are structures that can improve the retrieval time of data from a database table and have certain characteristics:
A . A SELECT statement can access one or more indices without accessing any tables: If the index contains all the columns needed for the query, Oracle can retrieve the data from the index alone without accessing the table. This is known as an index-only scan.
D . A UNIQUE index can be altered to be non-unique: It is possible to alter a unique index to become non-unique by using the ALTER INDEX command.
F . An update to a table can result in updates to any or all of the table's indexes: If the updated column is part of one or more indexes, those indexes will need to be updated to reflect the change. If the updated column is not part of an index, then no index update is required.
Reference:
Oracle Database SQL Language Reference 12c, especially sections on index management and the behavior of DML operations with respect to indexes.

NEW QUESTION # 242
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