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Oracle Database SQL Sample Questions (Q124-Q129):

NEW QUESTION # 124
Evaluate the following query:
Which is the correct output of the above query?

A. +25-00,+00-650,+00 11:12:10.123457
B. +25-00, +54-02, +00 11:12:10.123457
C. +00-300, +54-02,+00 11:12:10.123457
D. +00-300,+00-650,+00 11:12:10.123457

Answer: B

NEW QUESTION # 125
Which three items does a direction of a relationship contain?

A. an attribute
B. a cardinality
C. an entity
D. a unique identifier
E. an optionality
F. label

Answer: B,E,F

Explanation:
In data modeling and database design, the direction of a relationship typically includes:
* Option B: a cardinality
* Cardinality refers to the numerical relationships between two entities, indicating the number of instances of one entity that can or must be associated with each instance of another.
* Option C: label
* A label is often used to describe the role or purpose of the relationship in a way that clarifies the nature of the interaction between entities.
* Option D: an optionality
* Optionality indicates whether or not a relationship is mandatory or optional; in other words, it shows if an instance of an entity must be related to an instance of another entity or if it can exist without such a relationship.
Options A, E, and F are not part of the direction of a relationship:
* Option A: An attribute is a property or characteristic of an entity, not the direction of a relationship.
* Option E: A unique identifier uniquely identifies each instance of an entity, not a relationship's direction.
* Option F: An entity is a thing with distinct and independent existence in a database, usually mapped to a table, not a part of the direction of a relationship.

NEW QUESTION # 126
Which two statements are true about conditional INSERT ALL? (Choose two.)

A. Each WHENcondition is tested for each row returned by the subquery.
B. The total number of rows inserted is always equal to the number of rows returned by the subquery.
C. It cannot have an ELSEclause.
D. Each row returned by the subquery can be inserted into only a single target table.
E. A single WHEN condition can be used for multiple INTOclauses.

Answer: C,E

NEW QUESTION # 127
Examine the description of the EMPLOYEES table:

Which statement will execute successfully, returning distinct employees with non-null first names?

A. SELECT first_ name, DISTINCT last_ name FROM employees WHERE first_ name < > NULL;
B. SELECT DISTINCT * FROM employees WHERE first_ name IS NOT NULL;
C. SELECT Distinct * FROM employees WHERE first_ name < > NULL;
D. SELECT first_ name, DISTNCT last_ name FROM employees WHERE first_ name IS NOT NULL;

Answer: B

NEW QUESTION # 128
View the Exhibit and examine the structure of the ORDERS table.

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

Answer: B

NEW QUESTION # 129
......

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