Free PDF 2026 Oracle 1z0-071: Oracle Database SQL Study Guides

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Oracle 1z0-071 exam consists of 73 multiple-choice questions, and the candidates have 100 minutes to complete the exam. 1z0-071 exam is administered by Pearson VUE, and it can be taken online or at a testing center. The candidates who pass the exam receive a digital badge, which they can share on their social media profiles to showcase their skills and expertise in SQL development.

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Oracle Database SQL Sample Questions (Q174-Q179):

NEW QUESTION # 174
Examine the description of the ORDER_ITEMStable:

Examine this incomplete query:

Which two can replace <clause> so the query completes successfully? (Choose two.)

A. quantity * unit_price
B. product_id
C. total_paid
D. quantity
E. quantity, unit_price

Answer: A,C

Explanation:
Sample
SELECT tr_sub.cur_tt, tr_sub.item, sum(tr.quantity), sum(tr.quantity*tr.unit_price) FROM (SELECT tr1.transaction_time as cur_tt, max(tr2.transaction_time) as prev_tt, tr1.item as item, IF (tr1.unit_price=tr2.unit_price, tr1.unit_price, tr2.unit_price) as t_p FROM transactions tr1 LEFT JOIN transactions tr2 ON tr1.transaction_time>=tr2.transaction_time AND tr1.item=tr2.item GROUP BY tr1.item, tr1.transaction_time, t_p
https://stackoverflow.com/questions/50771172/sql-query-get-total-value-based-on-different-unit-price-quantity-at-different-ti

NEW QUESTION # 175
Examine the data in the CUSTOMERStable:

You want to list all cities that have more than one customer along with the customer details.
Evaluate the following query:

Which two JOIN options can be used in the blank in the above query to give the correct output?
(Choose two.)

A. RIGHT OUTER JOIN
B. JOIN
C. FULL OUTER JOIN
D. NATURAL JOIN
E. LEFT OUTER JOIN

Answer: A,B

NEW QUESTION # 176
Which three statements are true about views in an Oracle database?

A. A view can be created that refers to a non-existent table in its defining query.
B. A SELECT statement cannot contain a where clause when querying a view containing a WHERE clause in its defining query
C. Views have no segment.
D. Rows inserted into a table using a view are retained in the table if the view is dropped
E. Views have no object number.
F. Views can join tables only if they belong to the same schema.

Answer: A,C,D

Explanation:
A view is a virtual table based on a SQL query.
A: This is incorrect because a SELECT statement querying a view can contain a WHERE clause, regardless of the view's defining query. C. This is incorrect because views can join tables from different schemas, not just the same schema. B. Correct. The rows inserted into a base table via a view remain in the table even if the view is dropped because the view is just a window to the data in the base tables. D. Correct. Views do not require storage space other than for the definition of the view in the data dictionary, hence they have no segment. E. Incorrect. Views do not have object numbers because they are not database objects that occupy physical space. F. Correct. You can create a view that references non-existent tables; such a view would be considered invalid until the base table is created.
The Oracle Database Concepts guide provides information about views and their characteristics.

NEW QUESTION # 177
Which three statements are true regarding subqueries? (Choose three.)

A. Multiple columns or expressions can be compared between the main query and subquery.
B. Subqueries can contain GROUP BY and ORDER BY clauses.
C. Main query and subquery can get data from different tables.
D. Main query and subquery must get data from the same tables.
E. Only one column or expression can be compared between the main query and subquery.
F. Subqueries can contain ORDER BY but not the GROUP BY clause.

Answer: A,B,C

Explanation:
Explanation
References:
http://docs.oracle.com/javadb/10.6.2.1/ref/rrefsqlj13658.html

NEW QUESTION # 178
Which two statements are true regarding the EXISTS operator used in the correlated subqueries? (Choose two.)

A. The outer query continues evaluating the result set of the inner query until all the values in the result set are processed.
B. It is used to test whether the values retrieved by the outer query exist in the result set of the inner query.
C. The outer query stops evaluating the result set of the inner query when the first value is found.
D. It is used to test whether the values retrieved by the inner query exist in the result of the outer query.

Answer: B,C

NEW QUESTION # 179
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