STUFF Function: This function is used to overwrite existing character or inserts a string into another string. Syntax:
STUFF(string_expression,start, length, replacement_characters)
- string_expression: it is the string that will have characters substituted
- start: This refers to the starting position
- length: It refers to the number of characters in the string which are substituted.
- replacement_string: They are the new characters which are injected in the string.
REPLACE function: This function is used to replace the existing characters of all the occurrences.
REPLACE (string_expression, search_string, replacement_string)