Numeric literal is assumed to be text

  Explanation:  You tried to store a numeric literal into a text
  column or compare a numeric literal to a text column.  SQL
  assumes the string is a text literal and converts it for the
  storage or comparison.  Note that each digit in the numeric
  literal, including leading zeroes, is converted to text.  For
  instance, 001 and 1 represent the same number, but are converted
  to different literals ("001" and "1").

  User Action:  None.  However, it is good programming practice to
  convert the numeric literal to a string literal by enclosing it
  in quotes.