Question: what are sql injection characters?
Answer: \0 An ASCII NUL ( 0x00 ) character.
\' A single quote ( ' ) character.
\" A double quote ( " ) character.
\b A backspace character.
\n A newline (linefeed) character.
\r A carriage return character.
\t A tab character.
\Z ASCII 26 ( Ctrl + Z ).