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Oracle Database SQL Sample Questions (Q217-Q222):

NEW QUESTION # 217
Which three statements are true about Structured Query Language (SQL)?

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

Answer: D,F

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 # 218
Examine the structure proposed for the TRANSACTIONS table:

Which two statements are true regarding the creation and storage of data in the above table structure? (Choose two.)

A. The TRANS_VALIDITY column would give an error.
B. The CUST_STATUS column would give an error.
C. The CUST_CREDIT_LIMIT column would be able to store decimal values.
D. The TRANS_VALIDITY column would have a maximum size of one character.
E. The TRANS_DATE column would be able to store day, month, century, year, hour, minutes, seconds, and fractions of seconds.
F. The CUST_STATUS column would store exactly one character.

Answer: A,F

NEW QUESTION # 219
View the Exhibit and examine the structure of ORDERS and ORDER_ITEMS tables.
ORDER_ID is the primary key in the ORDERS table. It is also the foreign key in the ORDER_ITEMS table wherein it is created with the ON DELETE CASCADE option.
Which DELETE statement would execute successfully?

A. DELETE order_idFROM ordersWHERE order_total < 1000;
B. DELETE orders o, order_items IWHERE o.order_id = i.order_id;
C. DELETE ordersWHERE order_total < 1000;
D. DELETEFROM ordersWHERE (SELECT order_idFROM order_items);

Answer: D

NEW QUESTION # 220
View the Exhibit and examine the details of the ORDER_ITEMS table.

Evaluate the following SQL statements:
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 statements are true regarding the output of these SQL statements? (Choose all that apply.)

A. Both the statements would give the same output.
B. Statement 1 would return only one row of output.
C. Statement 1 would not return give the same output.
D. Statement 2 would return multiple rows of output.
E. Both statements would ignore NULL values for the UNIT_PRICE and QUANTITY columns.

Answer: B,D,E

NEW QUESTION # 221
Examine the structure of the MARKS table:

Which two statements would execute successfully? (Choose two.)

A. SELECT SUM(DISTINCT NVL(subject1,0)), MAX(subject1)FROM marksWHERE subject1 > subject2;
B. SELECT SUM(subject1+subject2+subject3)FROM marksWHERE student_name IS NULL;
C. SELECT student_name subject1FROM marksWHERE subject1 > AVG(subject1);
D. SELECT student_name,SUM(subject1)FROM marksWHERE student_name LIKE 'R%';

Answer: A,B

NEW QUESTION # 222
......

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