Multiple choice technology databases

Which of the following SQL functions can operate on any datatype?

  1. TO_CHAR

  2. LOWER

  3. LPAD

  4. MAX
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The MAX aggregate function operates on numeric, character, and date/time datatypes to find the maximum value. Other character functions like LOWER and LPAD only operate on character datatypes, while TO_CHAR is a conversion function that converts inputs into character values.

AI explanation

To answer this question, you need to understand the SQL functions and their capabilities. Let's go through each option to understand why it is correct or incorrect:

Option A) TO_CHAR - This function is used to convert a number or date to a character string. It operates on specific datatypes like numbers and dates, so it cannot operate on any datatype. Therefore, Option A is incorrect.

Option B) LOWER - This function is used to convert a character string to lowercase. It operates on character strings and can be used with any datatype that can be implicitly converted to a character string. Therefore, Option B is incorrect.

Option C) LPAD - This function is used to pad a character string with a specified character to a specified length. It operates on character strings and can be used with any datatype that can be implicitly converted to a character string. Therefore, Option C is incorrect.

Option D) MAX - This function is used to return the maximum value in a column or a set of values. It can operate on any datatype, including numbers, characters, and dates. Therefore, Option D is correct.

The correct answer is D. This option is correct because the MAX function can operate on any datatype.

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