Online Access Free Oracle.1z0-071.v2025-09-16.q232 Practice Test (Page 18)

1z0-071 Exam Question 81

View the Exhibit and examine the structure of the SALES table.

The following query is written to retrieve all those product IDs from the SALES table that have more than
55000 sold and have been ordered more than 10 items.

Which statement is true regarding this SQL statement?

A.It executes successfully and generates the required result.

B.It produces an error because COUNT (*) should be specified in the SELECT clause also.

C.It produces an error because COUNT (*) should be only in the HAVING clause and not in the WHERE clause.

D.It executes successfully but produces no result because COUNT(prod_id) should be used instead of COUNT(*).

1z0-071 Exam Question 82

Which three are true about dropping columns from a table?

A.A column can be removed only if it contains no data.

B.A column drop is implicitly committed

C.A column that is referenced by another column in any other table cannot be dropped.

D.A column must be set as unused before it is dropped from a table.

E.A primary key column cannot be dropped.

F.Multiple columns can be dropped simultaneously using the ALTER TABLE command.

Correct Answer: B,C,E

In Oracle Database 12c, the operations related to dropping columns from a table include several behaviors, each specified clearly in Oracle documentation and best practices:
B . A column drop is implicitly committed: Dropping a column in Oracle using the ALTER TABLE ... DROP COLUMN command is a DDL (Data Definition Language) operation, which means it cannot be rolled back. DDL commands in Oracle are automatically and implicitly committed, meaning that once a column is dropped, the action is finalized immediately.
C . A column that is referenced by another column in any other table cannot be dropped: In Oracle, if a column is being referenced by a foreign key constraint or any dependency from another table, you cannot directly drop it until those references are removed or disabled. This ensures data integrity across related tables.
E . A primary key column cannot be dropped: The primary key constraint is critical for identifying unique rows within a table. Oracle does not allow the dropping of columns that are part of a primary key without first dropping the constraint or modifying it to exclude the column you intend to drop.
Reference:
Oracle Database SQL Language Reference 12c, specifically sections discussing DDL operations and constraints.
In Oracle Database 12c, the operations related to dropping columns from a table include several behaviors, each specified clearly in Oracle documentation and best practices:
B . A column drop is implicitly committed: Dropping a column in Oracle using the ALTER TABLE ... DROP COLUMN command is a DDL (Data Definition Language) operation, which means it cannot be rolled back. DDL commands in Oracle are automatically and implicitly committed, meaning that once a column is dropped, the action is finalized immediately.
C . A column that is referenced by another column in any other table cannot be dropped: In Oracle, if a column is being referenced by a foreign key constraint or any dependency from another table, you cannot directly drop it until those references are removed or disabled. This ensures data integrity across related tables.
E . A primary key column cannot be dropped: The primary key constraint is critical for identifying unique rows within a table. Oracle does not allow the dropping of columns that are part of a primary key without first dropping the constraint or modifying it to exclude the column you intend to drop.
Oracle Database SQL Language Reference 12c, specifically sections discussing DDL operations and constraints.

1z0-071 Exam Question 83

In which three situations does a transaction complete? (Choose three.)

A.when a PL/SQL anonymous block is executed

B.when a DELETE statement is executed

C.when a ROLLBACK command is executed

D.when a data definition language (DDL) statement is executed

E.when a TRUNCATE statement is executed after the pending transaction

1z0-071 Exam Question 84

The user SCOTT who is the owner of ORDERS and ORDER_ITEMS tables issues this GRANT command:
GRANT ALL
ON orders, order_items
TO PUBLIC;
What must be done to fix the statement?

A.PUBLIC should be replaced with specific usernames.

B.ALL should be replaced with a list of specific privileges.

C.WITH GRANT OPTION should be added to the statement.

D.Separate GRANT statements are required for the ORDERS and ORDER_ITEMS tables.

1z0-071 Exam Question 85

View the Exhibit and examine the structure of the PRODUCT_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 UPPER(product_name)
FROM product_information
WHERE product_id = 2254;

B.SELECT UPPER(product_name)
FROM product_information;

C.SELECT product_id, UPPER(product_name)
FROM product_information
WHERE UPPER(product_name) = 'LASERPRO' OR list_price > 1000;

D.SELECT product_id
FROM product_information
WHERE UPPER(product_name) IN ('LASERPRO', 'CABLE');

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1z0-071 Exam Question 81

1z0-071 Exam Question 82

1z0-071 Exam Question 83

1z0-071 Exam Question 84

1z0-071 Exam Question 85

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