Which task can you perform using only the TO_CHAR function?

technology databases

  1. convert 10 to 'TEN'

  2. convert '10' to 10

  3. convert '10' to '10'

  4. convert 'TEN' to 10

Show answer
Correct Option: C

AI Explanation

To answer this question, you need to understand the TO_CHAR function in SQL.

The TO_CHAR function is used to convert a value to a character data type. It takes a value as input and returns a character representation of that value. However, it does not perform any other type conversions or transformations.

Let's go through each option to understand why it is correct or incorrect:

Option A) convert 10 to 'TEN' - This option is incorrect because the TO_CHAR function cannot convert a numeric value to a character string representing the word 'TEN'.

Option B) convert '10' to 10 - This option is incorrect because the TO_CHAR function does not perform any type conversions. It only converts a value to a character data type, so it cannot convert a character string to a numeric value.

Option C) convert '10' to '10' - This option is correct because the TO_CHAR function can be used to convert a character string to another character string. In this case, it would simply return the same character string '10'.

Option D) convert 'TEN' to 10 - This option is incorrect because the TO_CHAR function cannot convert a character string representing the word 'TEN' to a numeric value.

The correct answer is Option C) convert '10' to '10'. This option is correct because the TO_CHAR function can be used to convert a character string to another character string.

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