今天要做一个统计报表，想到使用存储过程来做。
mysql的存储过程以前没有用过，这次想试试，在编写的过程中遇到了不少问题：
首先，看了官方的文档
，不过对于存储过程，还是要使用才知道。文档是死的，人是活的。
1.怎么创建存储过程，自然也是使用一定语法，然后运行，如果成功，会有一个对应的文
件产生，并可以通过 call 来调用。
2.设定变量要注意，不是全局变量（@）时，要先定义（DECLARE year_months VARCHAR(10)）
3.设置变量时的语法，在变量前面加 SET 关键字，不然报错
4.直接执行SQL,是可以的，但是如果我们的SQL是动态的，比如我们表名是通过参数传进来的。
这时间要另外一种方式了，要将sql，使用CONCAT(,,,),来讲sql连接起来。还有就是字符串拼接时，
最好使用CONCAT(见下面的)函数，不然会有问题。
下面是我写的一个实例：
DROP PROCEDURE IF EXISTS `crm_sms_stat`;
CREATE DEFINER=`boss`@`%` PROCEDURE `crm_sms_stat`(IN years varchar(10),IN m varchar(10),IN last_months varchar(10))
BEGIN
DECLARE year_months VARCHAR(10);
DECLARE year_m VARCHAR(10);
DECLARE mt_sms_yearmonth VARCHAR(20);
DECLARE r_year_month VARCHAR(20);
DECLARE last_r_year_month VARCHAR(20);
SET year_months = CONCAT(years,m);
SET year_m = CONCAT(years,'-',m);
SET mt_sms_yearmonth = CONCAT("mt_sms_",year_months);
SET r_year_month = CONCAT(years,"_",m);
IF m = "01" THEN
SET years = years - 1;
SET last_months = "12";
END IF;
SET last_r_year_month = CONCAT(years,"_",last_months);
IF years = "2008" THEN
SET r_year_month = CONCAT("R",r_year_month);
SET last_r_year_month = CONCAT("R",last_r_year_month);
END IF;
/*---------------------------------------------------------------- */
SET @insertStat = CONCAT(' INSERT INTO crm_sms_stat(months,user_id,username,agentid) ',
' select "',year_months,'",u.user_id,u.username,u.agentid from ',mt_sms_yearmonth,
' mt inner join users u on mt.user_id=u.user_id group by mt.user_id ');
PREPARE insertS FROM @insertStat;
EXECUTE insertS;
SET @tempupdateRemain = CONCAT(' UPDATE crm_monthRemain cm,crm_sms_stat css SET css.last_remain = ifnull(',
last_r_year_month,',0),css.this_remain = ifnull(', r_year_month,',0) ',
' WHERE cm.id = css.user_id and css.months = "',year_months,'" ');
PREPARE remain FROM @tempupdateRemain;
EXECUTE remain;
-- 更新每个月用户所冲条数
SET @tempadd = CONCAT(' UPDATE crm_sms_stat css inner join (select name,sum(total_count) addNum from boss_addmoney ',
' where left(add_date,7)= "',year_m,'" and total_count >=0 and name not like "%=%" and name not like "%:%" group by name) ',
' x on css.username= x.name and css.months = "',year_months ,'" ',
' SET css.add_num = ifnull(x.addNum,0) ');
PREPARE addnum FROM @tempadd;
EXECUTE addnum;
IF years = "08" THEN
-- 更新通道发送数（200901之前是不分卡发和通道的）
SET @tempChannel08 = CONCAT('UPDATE crm_sms_stat css inner join (select mt.user_id,',
' sum(length(replace(mt.dest_mobile,";","")))/11 chennel_num',
' from ',mt_sms_yearmonth,' mt ',
' group by mt.user_id) x on css.user_id = x.user_id and css.months = "',year_months,'"',
' set css.channel_num = ifnull(x.chennel_num,0) ');
PREPARE channel08 FROM @tempChannel08;
EXECUTE channel08;
ELSE
-- channel send number
SET @tempChannel = CONCAT('UPDATE crm_sms_stat css inner join (select mt.user_id,',
' sum(length(replace(mt.dest_mobile,";","")))/11 chennel_num',
' from ',mt_sms_yearmonth,' mt WHERE mt.channel_id != 312 ',
' group by mt.user_id) x on css.user_id = x.user_id and css.months = "',year_months,'"',
' set css.channel_num = ifnull(x.chennel_num,0) ');
PREPARE channel FROM @tempChannel;
EXECUTE channel;
-- card send number
SET @tempcard = CONCAT('UPDATE crm_sms_stat css inner join (select mt.user_id,',
' sum(SUBSTRING_INDEX(SUBSTRING_INDEX(mt.dest_mobile, "real", 1),":",-1)) as submit_card_num,',
' sum(SUBSTRING_INDEX(mt.dest_mobile,":",-1)) as real_card_num',
' from ',mt_sms_yearmonth,' mt WHERE mt.channel_id = 312 ',
' group by mt.user_id) x on css.user_id = x.user_id and css.months = "',year_months,'"',
' set css.submit_card_num = ifnull(x.submit_card_num,0),css.real_card_num = ifnull(x.real_card_num,0) ');
PREPARE card FROM @tempcard;
EXECUTE card;
END IF;
END;
