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Oracle 1z0-071 Exam Syllabus Topics:

Oracle Database SQL Sample Questions:

Question #1
A non-correlated subquery can be defined as __________. (Choose the best answer.)

A. A set of sequential queries, all of which must return values from the same table.
B. A set of one or more sequential queries in which generally the result of the inner query is used as the search value in the outer query.
C. A set of sequential queries, all of which must always return a single value.
D. A SELECT statement that can be embedded in a clause of another SELECT statement only.

Question #2
Which two are true about unused columns? (Choose two.)

A. A query can return data from unused columns, but no DML is possible on those columns.
B. The DESCRIBE command displays unused columns.
C. Unused columns retain their data until they are dropped.
D. A foreign key column cannot be set to unused.
E. Once a column has been set to unused, a new column with the same name can be added to the table.
F. A primary key column cannot be set to unused.

Question #3
Which three statements are true about inner and outer joins? (Choose three.)

A. A full outer join returns matched and unmatched rows
B. Outer joins can be used when there are multiple join conditions on two tables
C. A left or right outer join returns only unmatched rows
D. Outer joins can only be used between two per query
E. A full outer join must use Oracle syntax
F. An inner join returns matched rows

Question #4
You execute this command:

Which two are true? (Choose two.)

A. A FLASHBACK TABLE statement can be used to retrieve the deleted data.
B. A ROLLBACK statement can be used to retrieve the deleted data.
C. It retains the indexes defined on the table.
D. It drops any triggers defined on the table.
E. It always retains the space used by the removed rows.
F. It retains the integrity constraints defined on the table.

Question #5
View the Exhibit and examine the descriptions of the DEPT and LOCATIOMS tables.

You want to update the CITY column of the DEPT table for all the rows with the corresponding value in the CITY column of the LOCATIONS table for each department.
Which SQL statement would you execute to accomplish the task?

A. UPDATE dept d
SET city = (SELECT city FROM locations l)
WHERE d.location_id = l.location_id;
B. UPDATE dept d
SET city = ALL (SELECT city
FROM locations l
WHERE d.location_id = l.location_id);
C. UPDATE dept d
SET city = ANY (SELECT city FROM locations l);
D. UPDATE dept d
SET city = (SELECT city
FROM locations l
WHERE d.location_id = l.location_id);

Solutions: