1.遞迴
delimiter $$;
drop procedure if exists `rentmgr`.`tmp`$$
** 引數說明：zjjg_id上級機構編號，result是輸出變數
** 函式說明：遞迴返回本級機構和下級所有機構編號，通過","分隔
create definer=`root`@`localhost` procedure `tmp`(in zgjg_id char(16),out result varchar(1000))
begin
declare _done int default 0;
declare jg_id1 char(250);
/*游標申明*/
declare cursor1 cursor for select jg_id from jgxxb where sjjg_id=zgjg_id;
declare continue handler for sqlstate '02000' set _done = 1;
set @@max_sp_recursion_depth = 10;
/*當為空值時返回本級結點*/
if result is null then
set result=zgjg_id;
end if;
/*開啟游標*/
open cursor1;
repeat
fetch cursor1 into jg_id1;
if not _done then
/*注意：如果想用result做為引數傳入的話，儲存過程不識別認為空值，這樣遞迴就會失敗！
解決方案：採用就建乙個臨時變數的方式，取得資料後用連線方式。@符即是為臨時儲存使用不需要申明。
set result=concat(result,',',jg_id1);
call tmp(jg_id1,result);
*/call tmp(jg_id1,@tmp1);
set result=concat(result,',',@tmp1);
end if;
until _done end repeat;
close cursor1;
end$$
delimiter ;$$
2.交叉表
delimiter $$;
drop procedure if exists `rentmgr`.`cross_tab`$$
create definer=`root`@`localhost` procedure `cross_tab`(vsourcetab varchar(2000),vgroupbyfield varchar(50),vtransformcol varchar(50),vpivotcol varchar(50))
begin
declare vfunction varchar(50)default "sum" ;/*求和函式*/
declare strsql varchar(8000); /*求和sql*/
declare done int default 0; /*游標判斷*/
declare strsum varchar(3000); /*求分組的總和*/
declare pcols varchar(100);
declare temp_ny varchar(10);
/*申明游標*/
declare cur1 cursor for select distinct ny from query_area order by ny;
declare continue handler for sqlstate '02000' set done = 1;
set strsql ='';
set strsum='';
set pcols='';
set strsql="select jg_id";/*select分組字段*/
open cur1;
repeat
fetch cur1 into temp_ny;/*年份*/
if not done then
/*求年月份*/
set strsql=concat(strsql,",sum(case when ny='",temp_ny,"' then mzh else 0 end) as ",temp_ny);
/*求年月份總和使用*/
set strsum=concat(strsum,"+case when a.",temp_ny," is null then 0 else a.",temp_ny," end");
end if;
until done end repeat;
close cur1;
/*內層sql求取各年份的值*/
set strsql=concat(strsql," from query_area group by jg_id");
set strsql=concat("(",strsql,")a");
/*求年月份總和*/
set strsum=concat("(0",strsum,") as total");
set strsql=concat("select a.*,",strsum," from ",strsql);
set @a=strsql;
/*拼湊得到的可執行的sql語句*/
select @a;
/*執行拼湊得到的可執行的sql語句*/
prepare stmt1 from @a;
execute stmt1 ;
end$$
delimiter ;$$
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