1Z0-071 Exam Questions & Answers

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1Z0-071 Exam Questions & Answers

Vendor: Oracle

Certifications: Oracle Database

Exam Code: 1Z0-071

Exam Name: Oracle Database SQL

Updated: Jul 30, 2022

Q&As: 431

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1Z0-071 Online Practice Questions and Answers

Questions 1

Which two statements are true regarding the UNION ALL operators?

A. NULLS are not ignored during duplicate checking.

B. Duplicates are eliminated automatically by the UNION ALL operator

C. The names of columns selected in each SELECT statement must be identical.

D. The number of columns selected in each SELECT statement must be identical

E. The output is sorted by the UNION ALL operator.

Show Answer
Questions 2

Evaluate the following ALTER TABLE statement:

ALTER TABLE orders

SET UNUSED (order_date);

Which statement is true?

A. After executing the ALTER TABLE command, you can add a new column called ORDER_DATE to the ORDERS table.

B. The ORDER_DATE column must be empty for the ALTER TABLE command to execute successfully.

C. ROLLBACK can be used to get back the ORDER_DATE column in the ORDERS table.

D. The DESCRIBE command would still display the ORDER_DATE column.

Show Answer
Questions 3

View the exhibit and examine the data in ORDERS_MASTER and MONTHLY_ORDERS tables.

Evaluate the following MERGE statement:

MERGE_INTO orders_master o USING monthly_orders m ON (o.order_id = m.order_id) WHEN MATCHED THEN UPDATE SET o.order_total = m.order_total DELETE WHERE (m.order_total IS NULL) WHEN NOT MATCHED THEN INSERT VALUES (m.order_id, m.order_total)

What would be the outcome of the above statement?

A. The ORDERS_MASTER table would contain the ORDER_IDs 1, 2, 3 and 4.

B. The ORDERS_MASTER table would contain the ORDER_IDs 1, 2 and 4.

C. The ORDERS_MASTER table would contain the ORDER_IDs 1, 2 and 3.

D. The ORDERS_MASTER table would contain the ORDER_IDs 1 and 2.

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