MySQL Special Character Escape Sequences

Escape Sequence	Character Represented by Sequence
\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 (Control+Z). See note following the table.
\\	A backslash (“\”) character.
\%	A “%” character. See note following the table.
\_	A “_” character. See note following the table.

http://dev.mysql.com/doc/refman/5.1/en/string-syntax.html