ince these characters
   would otherwise be taken as part of the range syntax.  To put a double
   quote or backslash in a quoted bound value, precede it with a
   backslash. (Also, a pair of double quotes within a double-quoted bound
   value is taken to represent a double quote character, analogously to the
   rules for single quotes in SQL literal strings.) Alternatively, you can
   avoid quoting and use backslash-escaping to protect all data characters
   that would otherwise be taken as range syntax.  