Which of the Following Commands Will Drop Any Columns Marked

question 28

Multiple Choice

Which of the following commands will drop any columns marked as unused from the TABLEA table?​

• A) ​DROP COLUMN FROM tablea WHERE column_status = UNUSED;
• B) ​ALTER TABLE tablea DROP UNUSED COLUMNS;
• C) ​ALTER TABLE tablea DROP (unused);
• D) ​DROP UNUSED COLUMNS:

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Definitions:

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The process of providing or adding oxygen to the body or a biological environment.

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A condition in which the environment contributes to maintaining a body's core temperature without needing to increase metabolic heat production.

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An automatic response in infants that prompts them to suck on anything that touches the roof of their mouth, aiding in breastfeeding or bottle-feeding.