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Oracle Updated 1z0-071 Exam Questions and Answers by kaleb

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Oracle 1z0-071 Exam Overview :

Exam Name: Oracle Database 12c SQL
Exam Code: 1z0-071 Dumps
Vendor: Oracle Certification: Oracle PL
Questions: 326 Q&A's Shared By: kaleb
Question 32

In which three situations does a new transaction always start?

Options:

A.

When issuing a SELECT FOR UPDATE statement after a CREATE TABLE AS SELECT statement was issued in the same session

B.

When issuing a CREATE INDEX statement after a CREATE TABLE statement completed unsuccessfully in the same session

C.

When issuing a TRUNCATE statement after a SELECT statement was issued in the same session

D.

When issuing a CREATE TABLE statement after a SELECT statement was issued in the same session

E.

When issuing the first Data Manipulation Language (OML) statement after a COMMIT or ROLLBACK statement was issued in the same session

F.

When issuing a DML statement after a DML statement filed in the same session.

Discussion
Question 33

What is true about non-equijoin statement performance?

Options:

A.

The between condition always performs less well than using the >= and <= conditions.

B.

The Oracle join syntax performs better than the SQL: 1999 compliant ANSI join syntax.

C.

The join syntax used makes no difference to performance.

D.

The between condition always performs better than using the >= and <= conditions.

E.

Table aliases can improve performance.

Discussion
Question 34

Examine this statement which executes successfully:

Which statement will violate the CHECK constraint?

Options:

A.

UPDATE emp80

SET department_id=90

WHERE department_id=80;

B.

DELETE FROM emp80

WHERE department_id=90;

C.

SELECT *

FROM emp80

WHERE department_id=80;

D.

SELECT *

FROM emp80

WHERE department_id=90;

Discussion
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Question 35

Which three are true about the MERGE statement?

Options:

A.

It can merge rows only from tables.

B.

It can use views to produce source rows.

C.

It can combine rows from multiple tables conditionally to insert into a single table.

D.

It can use subqueries to produce source rows.

E.

It can update the same row of the target table multiple times.

F.

It can update, insert, or delete rows conditionally in multiple tables.

Discussion
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