Which of the following releases a lock currently held by a user on the HOMEWORK10 table?a. A COMMIT command is issued.b. A DDL command is issued to end a transaction.c. The user exits the system.d. A ROLLBACK command is issued.e. all of the abovef. none of the above

Which of the following releases a lock currently held by a user on the HOMEWORK10 table?a. A COMMIT command is issued.b. A DDL command is issued to end a transaction.c. The user exits the system.d. A ROLLBACK command is issued.e. all of the abovef. none of the above

Oracle 12c: SQL

3rd Edition

ISBN:9781305251038

Author:Joan Casteel

Publisher:Joan Casteel

Chapter5: Data Manipulation And Transaction Control

Section: Chapter Questions

Problem 11MC

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Concept explainers

SQL

SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.

Queries

A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.

Question

Which of the following releases a lock currently held by a user on the HOMEWORK10 table?
a. A COMMIT command is issued.
b. A DDL command is issued to end a transaction.
c. The user exits the system.
d. A ROLLBACK command is issued.
e. all of the above
f. none of the above

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