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Oracle Database SQL Sample Questions (Q115-Q120):

NEW QUESTION # 115
View the Exhibit and examine the structure of ORDERS and CUSTOMERS tables.
(Choose the best answer.)

You executed this UPDATE statement:
UPDATE
( SELECT order_date, order_total, customer_id FROM orders)
Set order_date = '22-mar-2007'
WHERE customer_id IN
(SELECT customer_id FROM customers
WHERE cust_last_name = 'Roberts' AND credit_limit = 600);
Which statement is true regarding the execution?

A. It would not execute because a subquery cannot be used in the WHERE clause of an UPDATE statement.
B. It would not execute because two tables cannot be referenced in a single UPDATE statement.
C. It would not execute because a SELECT statement cannot be used in place of a table name.
D. It would execute and restrict modifications to the columns specified in the SELECT statement.

Answer: D

NEW QUESTION # 116
Examine the description of the ORDERStable:

Examine the description of the INVOICEStable:

Examine this query:

Which three rows will it return? (Choose three.)

A. 1 <null>
B. 3 01-JAN-2019
C. 2 <null>
D. 5 01-MAR-2019
E. 4 01-FEB-2019
F. 5 <null>
G. 3 <null>

Answer: B,C,D

NEW QUESTION # 117
An Oracle database server session has an uncommitted transaction in progress which updated 5000 rows in a table.
In which three situations does the transact ion complete thereby committing the updates?

A. When a DBA issues a successful SHUTDOWN TRANSACTIONAL statement and the user, then issues a COMMIT
B. When a DBA issues a successful SHUTDOWN IMMEDIATE statement and the user then issues a COMMIT
C. When the session logs out is successfully
D. When a COMMIT statement is issued by the same user from another session in the same database instance
E. When a CREATE INDEX statement is executed successfully in same session
F. When a CREATE TABLE AS SELECT statement is executed unsuccessfully in the same session

Answer: A,C,E

Explanation:
For situations where the transaction would complete by committing the updates:
* A. When the session logs out successfully: When a user session logs out, Oracle automatically commits any outstanding transactions.
* C. When a CREATE INDEX statement is executed successfully in the same session: Most DDL statements, including CREATE INDEX, cause an implicit commit before and after they are executed.
* F. When a DBA issues a successful SHUTDOWN TRANSACTIONAL statement: This type of shutdown ensures that active transactions are either committed or rolled back. If a COMMIT is then issued explicitly, it would be redundant but emphasizes the transaction completion.
Incorrect options:
* B: SHUTDOWN IMMEDIATE will roll back transactions, not commit them.
* D: A COMMIT in one session cannot affect the transaction state of another session; each session is isolated in terms of transaction management.
* E: If a CREATE TABLE AS SELECT statement executes unsuccessfully, no implicit commit is performed; the statement failure means the transaction state remains unchanged.

NEW QUESTION # 118
Examine the command:

What does ON DELETE CASCADE imply?

A. When the BOOKStable is dropped, all the rows in the BOOK_TRANSACTIONStable are deleted but the table structure is retained.
B. When a row in the BOOKStable is deleted, the rows in the BOOK_TRANSACTIONStable whose BOOK_ID matches that of the deleted row in the BOOKStable are also deleted.
C. When the BOOKStable is dropped, the BOOK_TRANSACTIONStable is dropped.
D. When a value in the BOOKS.BOOK_IDcolumn is deleted, the corresponding value is updated in the BOOKS_TRANSACTIONS.BOOK_IDcolumn.

Answer: B

Explanation:
Explanation

NEW QUESTION # 119
The EMPLOYEES table contains columns EMP_ID of data type NUMBER and HIRE_DATE of data type DATE You want to display the date of the first Monday after the completion of six months since hiring.
The NLS_TERRITORY parameter is set to AMERICA in the session and, therefore, Sunday is the first day of the week Which query can be used?

A. SELECT emp_id,NEXT_DAY(ADD_MONTHS(hire_date,6),1) FROM employees;
B. SELECT emp_id,ADD_MONTHS(hire_date,6), NEXT_DAY('MONDAY') FROM employees;
C. SELECT emp_id,NEXT_DAY(MONTHS_BETWEEN(hire_date,SYSDATE),6) FROM employees;
D. SELECT emp_id,NEXT_DAY(ADD_MONTHS(hite_date,6),'MONDAY') FROM employees;

Answer: D

Explanation:
The function ADD_MONTHS(hire_date, 6) adds 6 months to the hire_date. The function NEXT_DAY(date, 'day_name') finds the date of the first specified day_name after the date given. In this case, 'MONDAY' is used to find the date of the first Monday after the hire_date plus 6 months.
Option A is correct as it accurately composes both ADD_MONTHS and NEXT_DAY functions to fulfill the requirement.
Options B, C, and D do not provide a valid use of the NEXT_DAY function, either because of incorrect syntax or incorrect logic in calculating the required date.
The Oracle Database SQL Language Reference for 12c specifies how these date functions should be used.

NEW QUESTION # 120
......

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