5.7.4 String Variables
  Unlike some of the numeric variables described so far, a
  string variable does not correspond to a single location in
  memory because a string variable is more likely to exceed a
  single location in memory. Therefore, the value of a string
  variable may be contained in any number of memory loca-
  tions. However, a string variable is still referred to by a single
  name. For example:
  DECLARE STRING Employee_name