3rd Edition

ISBN: 9781305251038

Author: Joan Casteel

Publisher: Cengage Learning

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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 prio…

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Chapter 3, Problem 7MC

Which of the following commands drops any columns marked as unused from the SECUSTOMERORDERS table?

a. DROP COLUMN FROM secustomerorders WHERE column_status = UNUSED
b. ALTER TABLE secustomerorders DROP UNUSED COLUMNS;
c. ALTER TABLE secustomerorders DROP (unused);
d. DROP UNUSED COLUMNS;

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Chapter 3, Problem 6MC

Chapter 3, Problem 8MC

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Chapter 3 Solutions

Oracle 12c: SQL

Ch. 3 - Which command is used to create a table based on...Ch. 3 - Prob. 2RQ Ch. 3 - What guidelines should you follow when naming...Ch. 3 - What is the difference between dropping a column...Ch. 3 - Prob. 5RQ Ch. 3 - What happens to the existing rows of a table if...Ch. 3 - Explain the difference between truncating a table...Ch. 3 - Prob. 8RQ Ch. 3 - What happens if you try to decrease the scale or...Ch. 3 - Are a table and the data contained in the table...

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Which of the following commands drops any columns marked as unused from the SECUSTOMERORDERS table? a. DROP COLUMN FROM secustomerorders WHERE column_status = UNUSED b. ALTER TABLE secustomerorders DROP UNUSED COLUMNS; c. ALTER TABLE secustomerorders DROP (unused); d. DROP UNUSED COLUMNS;

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