mysql存储过程实例

DROP FUNCTION IF EXISTS `fun_convert`$

CREATE DEFINER=`root`@`%` FUNCTION   `fun_convert`(para varchar(255))

 RETURNS varchar(255) CHARSET gbk

BEGIN

         declare   result varchar(255) default ‘‘;

         declare   cnt int default 0;

         declare   i int default 0;

         declare   id BIGINT default 0;

         set   cnt = length(para) - length(replace(para,‘,‘,‘‘))-1;

         WHILE   i < cnt DO

      select c.id into id from company c where c.code =   SUBSTRING(para,i*3+2,2);

                   set   result = CONCAT(result, ",",id);

                   set   i = i+1;

         end   WHILE;

         set   result = CONCAT(result, ",");

         RETURN   result;

END

$

delimiter ;

update users u set u.company =   fun_convert(u.COMPANY);