Question
CREATE TABLE digits
(id NUMBER(2),
description VARCHAR2(15));
INSERT INTO digits VALUES (1,'ONE);
UPDATE digits SET description ='TWO'WHERE id=1;
INSERT INTO digits VALUES (2 ,'TWO');
COMMIT;
DELETE FROM digits;
SELECT description FROM digits
VERSIONS BETWEEN TIMESTAMP MINVALUE AND MAXVALUE;a.
It would not display any values
b.
It would display the value TWO once
c.
It would display the value TWO twice
d.
It would display the values ONE, TWO, and TWO
Posted under DBMS
Engage with the Community - Add Your Comment
Confused About the Answer? Ask for Details Here.
Know the Explanation? Add it Here.
Q. What would be the outcome of the below query?
Similar Questions
Discover Related MCQs
Q. Which statements are correct regarding indexes?
View solution
Q. Which of the following causes system to crash
View solution
Q. The database is partitioned into fixed-length storage units called
View solution
Q. The failure occurred sufficiently early during the transfer that the destination block remains intact.
View solution
Q. Which kind of failure loses its data in head crash or failure during transfer operation.
View solution
Q. The assumption that hardware errors and bugs in the software bring the system to a halt, but do not corrupt the nonvolatile storage contents, is known as the
View solution
Q. The transaction can no longer continue with its normal execution because of some internal condition, such as bad input, data not found, overflow, or resource limit exceeded. This is
View solution
Q. The system has entered an undesirable state (for example, deadlock), as a result of which a transaction cannot continue with its normal execution. This is
View solution
Q. Which of the following belongs to transaction failure
View solution
Q. Which one of the following is a failure to system
View solution
Q. The recovery scheme must also provide
View solution
Q. Instead of locking index leaf nodes in a two-phase manner, some index concurrency-control schemes use ___________ on individual key values, allowing other key values to be inserted or deleted from the same leaf.
View solution
Q. B-link tree requires a pointer to its __________ sibling.
View solution
Q. In crabbing protocol to inset or delete a key value the leaf node has to be locked in ___________ mode.
View solution
Q. If needed to split a node or coalesce it with its siblings, or redistribute key values between siblings, the crabbing protocol locks the parent of the node in ____________ mode.
View solution
Q. In crabbing protocol the the lock obtained on the root node is in _________ mode.
View solution
Q. The deadlock can be handled by
View solution
Q. In crabbing protocol locking
View solution
Q. How many techniques are available to control concurrency on B+ trees?
View solution
Q. Why do we need concurrency control on B+ trees ?
View solution
Suggested Topics
Are you eager to expand your knowledge beyond DBMS? We've curated a selection of related categories that you might find intriguing.
Click on the categories below to discover a wealth of MCQs and enrich your understanding of Computer Science. Happy exploring!
.png)
