Which character function can be used to return a specified portion of a character string

  1. INSTR

  2. SUBSTRING

  3. SUBSTR

  4. POS


Correct Option: C

AI Explanation

To answer this question, you need to understand the character functions used in string manipulation.

Option A) INSTR - This option is incorrect because the INSTR function is used to find the starting position of a specified substring within a string.

Option B) SUBSTRING - This option is incorrect because the SUBSTRING function is used to extract a substring from a string based on a specified starting position and length.

Option C) SUBSTR - This option is correct because the SUBSTR function is used to extract a substring from a string based on a specified starting position and, optionally, a length.

Option D) POS - This option is incorrect because there is no standard character function called POS in most programming languages or database systems.

The correct answer is C) SUBSTR. This option is correct because the SUBSTR function is specifically designed to return a specified portion of a character string.

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