Syntax

1. <string_function> ::=
     ALPHA(<string_spec>[,<unsigned_integer>])
   | ASCII(<string_spec>)
   | CONCAT(<string_spec>,<string_spec>)
   | EXPAND(<string_spec>)
   | LFILL(<string_spec>,<string_literal>[,<unsigned_integer>])
   | LOWER(<string_spec>)
   | LPAD(<string_spec>,<expression>,<string_literal>[,<unsigned_integer>])
   | LTRIM(<string_spec>[,<string_spec>])
   | MAPCHAR(<string_spec>[,<unsigned_integer>][,<mapchar_set_name>])
   | REPLACE(<string_spec>,<string_spec>[,<string_spec>])
   | RFILL(<string_spec>,<string_literal>,[,<unsigned_integer>])
   | RPAD(<string_spec>,<expression>,<string_literal>[,<unsigned_integer>])
   | RTRIM(<string_spec>[,<string_spec>])
   | SOUNDEX(<string_spec>)
   | SQLMODE()
   | SUBSTR(<string_spec>,<expression>[,<expression>])
   | TRANSLATE(<string_spec>,<string_spec>,<string_spec>)
   | TRIM(<string_spec>[,<string_spec>])
   | UPPER(<string_spec>)
   | <string_spec> || <string_spec>
   | <string_spec> & <string_spec>