                     ----------  EXPR Clause  ----------

   EXPR ϼɽ路ޤϡSELECT ޥɤ WHERE ʤ¾Υޥɤΰ
 ˻ȤȤǤޤ

 ιʸ

        EXPR : |ATTR                              |
               |STRING CONSTANT                   |
               |NUMBER                            |
               |(EXPR)                            |
               |convert EXPR [to] DATATYPE        |
               |convert EXPR [to] generic DATATYPE|
               |EXPR convert to DATATYPE          |
               |EXPR convert [to] generic DATATYPE|
               |EXPR OPERATOR EXPR                |
               |EXPR OPERATOR                     |
               |OPERATOR EXPR                     |
               |BUILT_IN_FUNCTION                 |
               |USER_DEFINED_FUNCTION                   |

        OPERATOR : +            ͥǡ
                   -            ͥǡκ
                   *            ͥǡ
                   /            ͥǡν
                   %            ͥǡä;
                   concat       ʸǡϢ
                   day(s)       Ѵñ黻
                   week(s)      Ѵñ黻
                   ¾       year(s),month(s),hour(s),minute(s),second(s),
                                yearof,monthof,dayof,hourof,minuteof,secondof

        BUILT_IN_FUNCTION :
                abs()
                ceiling()
                datenext()
                dayname()
                dayofweek()
                dayofyear()
                floor()
                is_decimal()
                is_integer()
                is_white()
                length()
                lpad()
                ltrim()
                lscan()
                nullval()
                round()
                rpad()
                rscan()
                rtrim()
                sign()
                strdel()
                strins()
                substr()
                tolower()
                toupper()
                trunc()

   USER_DEFINED_FUNCTION ϡ桼ǽޥ˥奢˵Ҥ줿ˡ
 ؿǤ
