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Oracle Database SQL Sample Questions (Q307-Q312):

NEW QUESTION # 307
View the exhibit and examine the structure and data in the invoice table. (Choose two.) Which two SQL statements would execute successfully?

A. SELECT AVG(inv_date) FROM invoice
B. SELECT AVG( inv_date -SYSDATE), AVG(inv_amt) FROM invoice
C. SELECT MAX(inv_date), MIN(cust_id) FROM invoice
D. SELECT MAX(AVG(SYSDATE -inv_date)) FROM invoice

Answer: B,C

NEW QUESTION # 308
Which two statements will return the names of the three employees with the lowest salaries?

A. SELECT last_name, salary
FROM employees
WHERE ROWNUM<=3
B. SELECT last_name,salary
FROM employees
FETCH FIRST 3 ROWS ONLY
ORDER BY salary;
C. SELECT last_name,salary
FROM employees
ORDER BY salary
FETCH FIRST 3 ROWS ONLY;
D. SELECT last_name,salary
FROM employees
WHERE ROWNUM<=3
ORDER BY (SELECT salary FROM employees);
E. SELECT last_name,salary
FROM (SELECT * FROM employees ORDER BY salary)

Answer: C

Explanation:
To retrieve the names of the three employees with the lowest salaries, the correct SQL syntax and logic are crucial:
* Option B:
* SELECT last_name, salary FROM employees ORDER BY salary FETCH FIRST 3 ROWS ONLY;
* This query correctly sorts employees by their salary in ascending order and fetches the first three rows only. The FETCH FIRST n ROWS ONLY syntax is a standard way to limit the result set in SQL.
Options A, C, D, and E do not correctly implement the logic for fetching the lowest three salaries due to misuse of ROWNUM or incorrect placement of ORDER BY and FETCH clauses.

NEW QUESTION # 309
Examine this description of the PRODUCTS table:

Rows exist in this table with data in all the columns. You put the PRODUCTS table in read-only mode.
Which three commands execute successfully on PRODUCTS?

A. ALTER TABLE products DROP UNUSED COLUMNS;
B. CREATE INDEX price_idx ON products (price);
C. TRUNCATE TABLE products;
D. DROP TABLE products;
E. ALTER TABLE products SET UNUSED (expiry_date);
F. ALTER TABLE products DROP COLUMN expiry_date;

Answer: B,C,D

NEW QUESTION # 310
View the exhibit and examine the description of the EMPLOYEES table. (Choose two.)

You executed this SQL statement:
SELECT first_name, department_id, salary
FROM employees
ORDER BY department_id, first_name, salary desc;
Which two statements are true regarding the result? (Choose two.)

A. The values in the SALARY column would be returned in descending order for all employees having the same value in the DEPARTMENT_ID and FIRST_NAME column.
B. The values in the FIRST_NAME column would be returned in ascending order for all employees having the same value in the DEPARTMENT_ID column.
C. The values in all columns would be returned in descending order.
D. The values in the SALARY column would be returned in descending order for all employees having the same value in the DEPARTMENT_ID column.
E. The values in the FIRST_NAME column would be returned in descending order for all employees having the same value in the DEPARTMENT_ID column.

Answer: A,B

NEW QUESTION # 311
Examine the structure proposed for the TRANSACTIONS table:

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

A. The CUST_STATUS column would allow storage of data up to the maximum VARCHAR2 size of 4,000 characters.
B. The TRANS_VALIDITY column would allow storage of a time interval in days, hours, minutes, and seconds.
C. The CUST_CREDIT_VALUE column would allow storage of positive and negative integers.
D. The TRANS_DATE column would allow storage of dates only in the dd-mon-yyyy format.

Answer: B,C

NEW QUESTION # 312
......

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1z0-071 Latest Demo, 1z0-071 New Braindumps Book

Oracle 1z0-071 New Braindumps Book & 1z0-071 New Learning Materials

Oracle Database SQL Sample Questions (Q307-Q312):

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