Multiple choice technology embedded technologies

Which of the following can be a valid column name?

  1. Column

  2. 1966_Invoices

  3. Catch_#22

  4. #Invoices
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Oracle column names must start with a letter (A-Z or a-z) and can contain letters, numbers, and underscores. Option A 'Column' is a reserved keyword, Option B starts with a number, and Option D starts with '#'. Only Option C 'Catch_#22' is valid: it starts with a letter and the '#' symbol is allowed in non-leading positions.

AI explanation

To answer this question, we need to understand the rules for valid column names in databases.

In general, valid column names should adhere to the following guidelines:

  1. They should not contain any special characters, except for underscores (_) or dollar signs ($).
  2. They should not start with a number.

Let's go through each option to determine which one is a valid column name:

Option A) Column - This option is valid because it only contains alphabetic characters and does not violate any of the guidelines.

Option B) 1966_Invoices - This option is not valid because it starts with a number.

Option C) Catch_#22 - This option is valid because it contains an underscore and only alphanumeric characters.

Option D) #Invoices - This option is not valid because it starts with a special character.

Therefore, the correct answer is option C) Catch_#22, as it adheres to the rules for valid column names.

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