{keyword}' Union — All Select Null#

: Appends the results of a second query to the first [3, 4].

: Acts as a placeholder to match the number of columns in the original query [1, 5]. {KEYWORD}' UNION ALL SELECT NULL#

: Comments out the rest of the original code so it doesn't cause an error [2]. : Appends the results of a second query to the first [3, 4]