Multiple choice technology databases

Which two tasks can your perform by using the TO_CHAR function? (Choose two)

  1. Convert 10 to 'TEN'

  2. Convert '10' to 10

  3. Convert '10' to '10'

  4. Convert 'TEN' to 10

  5. Convert a date to a character expression

  6. Convert a character expression to a date
Reveal answer Fill a bubble to check yourself
C,E Correct answer
Explanation

The Oracle TO_CHAR function converts a number or date value to a character string. Thus, converting a date to a character expression is correct, as is converting the number 10 to the string '10' (though option 531903 is written as '10' to '10', it represents character conversion).

AI explanation

To answer this question, let's go through each option to understand which tasks can be performed using the TO_CHAR function:

Option A) Convert 10 to 'TEN' - The TO_CHAR function is used to convert a value to a character expression. It is not used to convert a numeric value to a string representation, so this option is incorrect.

Option B) Convert '10' to 10 - The TO_CHAR function is not used to convert a string representation of a number to a numeric value. This option is incorrect.

Option C) Convert '10' to '10' - The TO_CHAR function is used to convert a value to a character expression. In this case, it can be used to convert the string '10' to the string '10'. This option is correct.

Option D) Convert 'TEN' to 10 - The TO_CHAR function is not used to convert a string representation of a number to a numeric value. This option is incorrect.

Option E) Convert a date to a character expression - The TO_CHAR function can be used to convert a date to a character expression. This option is correct.

Option F) Convert a character expression to a date - The TO_CHAR function is used to convert a value to a character expression, not to convert a character expression to a date. This option is incorrect.

The correct answers are: C) Convert '10' to '10', and E) Convert a date to a character expression.

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