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Oracle Database SQL Sample Questions (Q233-Q238):

NEW QUESTION # 233
Which two statements are true about * _TABLES views?

A. ALL TABLES displays all tables owned by the current user.
B. You must have ANY TABLE system privileges, or be granted object privileges on the table, to view a table in USER_TABLES.
C. USER TABLES displays all tables owned by the current user.
D. You must have ANY TABLE system privileges, or be granted object privileges on the table, to view a table in ALL_TABLES.
E. You must have ANY TABLE system privileges, or be granted object privilges on the table, to viewa tabl e in DBA TABLES.
F. All users can query DBA_TABLES successfully.

Answer: A,C

Explanation:
In Oracle, *_TABLES views provide information about tables.
B . USER_TABLES displays all tables owned by the current user, making this statement true. No additional privileges are required to see your own tables.
D . ALL_TABLES displays all tables that the current user has access to, either through direct ownership or through privileges, making this statement true.
A, C, E, and F are incorrect. Specifically:
A and E are incorrect because you do not need ANY TABLE system privileges to view tables in DBA_TABLES or ALL_TABLES; you need the SELECT_CATALOG_ROLE or equivalent privileges.
C is incorrect because as a user, you do not need additional privileges to see your own tables in USER_TABLES.
F is incorrect because not all users can query DBA_TABLES; this requires specific privileges or roles.
Reference:
Oracle Database Reference, 12c Release 1 (12.1): "Static Data Dictionary Views"

NEW QUESTION # 234
Examine these SQL statements which execute successfully:

Which two statements are true after execution?

A. The foreign key constraint will be enabled and IMMEDIATE.
B. The foreign key constraint will be disabled.
C. The primary key constraint will be enabled and DEFERRED.
D. The foreign key constraint will be enabled and DEFERRED.
E. The primary key constraint will be enabled and IMMEDIATE.

Answer: B,E

NEW QUESTION # 235
Which three statements are true about dropping and unused columns in an Oracle database?

A. An unused column's space is reclaimed automatically when the row containing that column is next queried.
B. A primary key column referenced by another column as a foreign key can be dropped if using the cascade option.
C. An unused column's space is reclaimed automatically when the block containing that column is next queried.
D. A drop column command can be rolled back.
E. A column that is set to unused still counts towards the limit of 1000 columns per table.
F. Partition key columns cannot be dropped.

Answer: C,E,F

NEW QUESTION # 236
View the Exhibit and examine the structure of the PORDUCT_INFORMATION table. (Choose the best answer.)

PRODUCT_ID column is the primary key.
You create an index using this command:
SQL > CREATE INDEX upper_name_idx
ON product_information(UPPER(product_name));
No other indexes exist on the PRODUCT_INFORMATION table.
Which query would use the UPPER_NAME_IDX index?

A. SELECT product_idFROM product_informationWHERE UPPER(product_name) IN ('LASERPRO',
'CABLE');
B. SELECT UPPER(product_name)FROM product_informationWHERE product_id = 2254;
C. SELECT product_id, UPPER(product_name)FROM product_informationWHERE
UPPER(product_name) = 'LASERPRO' OR list_price > 1000;
D. SELECT UPPER(product_name)FROM product_information;

Answer: A

NEW QUESTION # 237
View the exhibit and examine the description of the DEPARTMENTS and EMPLOYEES tables.

You wrote this SQL statement to retrieve EMPLOYEE_ID, FIRST_NAME, and DEPARTMENT NAME, for all employees:
SELECT employee_id, first_name, department_name
FROM employees
NATURAL JOIN departments;
The desired output is not obtained after executing the above SQL statement. What could be the reason for this?

A. The DEPARTMENTS table is not used before the EMPLOYEES table in the FROM clause.
B. The table prefix is missing for the column names in the SELECT clause.
C. The EMPLOYEES and DEPARTMENTS tables have more than one column with the same column name and data type.
D. The NATURAL JOIN clause is missing the USING clause.

Answer: C

Explanation:
Natural join needs only one column to be the same in each table. The EMPLOYEES and DEPARTMENTS tables have two columns that are the same (Department_ID and Manager_ID)

NEW QUESTION # 238
......

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