Replaces a piece of a text string with a different string.
text String (required) - A piece of text to be searched.
start_position Number (required) - Position within the string to begin the search.
num_characters Number (required) - Number of characters in original string to be replaced.
replacement String (required) - String to replace
// replaces 'survey' with 'inspection' REPLACE("Data collection survey", 17, 6, "inspection") // returns "Data collection inspection"