When Is It Necessary to Qualify a Column Name While

question 21

Multiple Choice

When is it necessary to qualify a column name while joining tables in MySQL?

• A) It is necessary when the tables have identical column names.
• B) It is necessary when the tables have different column names.
• C) It is never necessary when you join tables in MySQL.
• D) It is necessary every time you join tables in MySQL.

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Definitions:

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The function of the skin and its accessory structures in protecting the body from environmental hazards and pathogens.

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