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Oracle 1z1-071: Oracle Database SQL exam is a certification exam that is designed to test the SQL skills and knowledge of database professionals. 1z0-071 exam is intended for individuals who have a good understanding of SQL and want to become Oracle certified professionals. 1z0-071 exam is based on Oracle Database 12c and tests the candidates' ability to create, modify, and manage database objects, including data manipulation, data retrieval, and data control.

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Oracle Database SQL Sample Questions (Q273-Q278):

NEW QUESTION # 273
Examine the structure of the MEMBERS table:

Examine the SQL statement:
SQL > SELECT city, last_name LNAME FROM MEMBERS ORDER BY 1, LNAME DESC; What would be the result execution? (Choose the best answer.)

A. It fails because a column alias cannot be used in the ORDER BY clause.
B. It fails because a column number and a column alias cannot be used together in the ORDER BY clause.
C. It displays all cities in ascending order, within which the last names are further sorted in descending order.
D. It displays all cities in descending order, within which the last names are further sorted in descending order.

Answer: C

NEW QUESTION # 274
Which two tasks require subqueries?

A. Display the total number of products supplied by supplier 102 which have a product status of obsolete.
B. Display suppliers whose PROD_LIST_PRICE is less than 1000.
C. Display products whose PROD_MIN_PRICE is more than the average PROD_LIST_PRICE of all products, and whose status is orderable.
D. Display the minimum PROD_LIST_PRICE for each product status.
E. Display the number of products whose PROD_LIST_PRICE is more than the average PROD_LIST_PRICE.

Answer: C,E

Explanation:
C: True. To display the number of products whose PROD_LIST_PRICE is more than the average PROD_LIST_PRICE, you would need to use a subquery to first calculate the average PROD_LIST_PRICE and then use that result to compare each product's list price to the average.
E: True. Displaying products whose PROD_MIN_PRICE is more than the average PROD_LIST_PRICE of all products and whose status is orderable would require a subquery. The subquery would be used to determine the average PROD_LIST_PRICE, and then this average would be used in the outer query to filter the products accordingly.
Subqueries are necessary when the computation of a value relies on an aggregate or a result that must be obtained separately from the main query, and cannot be derived in a single level of query execution.
Reference:
Oracle's SQL documentation provides guidelines for using subqueries in scenarios where an inner query's result is needed to complete the processing of an outer query.

NEW QUESTION # 275
Which three statements are true about Structured Query Language (SQL)?

A. It requires that data be contained in hierarchical data storage
B. It guarantees atomicity, consistency, isolation, and durability (ACID) features
C. It provides independence for logical data structures being manipulated from the underlying physical data storage
D. It is the only language that can be used for both relational and object-oriented databases
E. It best supports relational databases
F. It is used to define encapsulation and polymorphism for a relational table

Answer: C,E

Explanation:
For question 134, the correct options are B and F based on the capabilities and design of SQL:
B . It best supports relational databases: SQL is fundamentally designed to manage and query data in relational databases. It is the standard language used for managing relational database management systems (RDBMS) and for performing all types of data operations within them.
F . It provides independence for logical data structures being manipulated from the underlying physical data storage: SQL allows users to interact with the data at a logical level without needing to know how the data is physically stored. This is known as logical data independence, which is a key feature of SQL in managing databases.
Other options are incorrect because:
A: SQL itself doesn't guarantee ACID properties; these are provided by the database management system's transaction control mechanisms.
C, D, E: These statements are incorrect as SQL does not inherently support object-oriented concepts like encapsulation and polymorphism, is not limited to hierarchical data storage, and is not the only language used for both relational and object-oriented databases.

NEW QUESTION # 276
Examine the commands used to create DEPARTMENT_DETAILS and COURSE_DETAILS tables:

You want to generate a list of all department IDs along with any course IDs that may have been assigned to them.
Which SQL statement must you use?

A. SELECT d.department_id, c.course_id FROM department_details d RIGHT OUTER JOIN course_details c ON (c.department_id=d.department_id);
B. SELECT d.department_id, c.course_id FROM department_details d RIGHT OUTER JOIN course_details c ON (d.department_id=c.department_id);
C. SELECT d.department_id, c.course_id FROM department_details d LEFT OUTER JOIN course_details c ON (d.department_id=c.department_id);
D. SELECT d.department_id, c.course_id FROM course_details c LEFT OUTER JOIN department_details d ON (c.department_id=d.department_id);

Answer: C

NEW QUESTION # 277
You want to write a query that prompts for two column names and the WHERE condition each time It is executed in a session but only prompts for the table name the first time it is executed. The variables used in your query are never undefined in your session . Which query can be used?

A. SELECT'&co11','&&co12'
FROM &table
WHERE'&&condition' ='&cond';
B. SELECT &col1, &col2
FROM &&table
WHERE &condition;
C. SELECT&&col1, &&col2
FROM &table
WHERE &&condition;
D. SELECT &col1, &col2
FROM "&table"
WHERE &condition;
E. SELECT &&col1,&&col2
FROM &table
WHERE &&condition= &&cond;

Answer: B

NEW QUESTION # 278
......

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Oracle Database SQL Sample Questions (Q273-Q278):

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