mysql 创建存储过程
实例一：
CREATE PROCEDURE cp_test()
BEGIN
declare a int;
declare b int;
set a=1;
set b=2;
select a,b;
END实例二：
CREATE PROCEDURE cp_Stat_VideoData()
BEGIN
declare yestday date;
set yestday=date(date_add(NOW(), interval -1 day));
if exists(select Id from Stat_VideoHits where AddDate = yestday)
THEN
delete from Stat_VideoHits where AddDate=yestday;
end if;
insert into Stat_VideoHits(Id,VideoId,Times,AddDate) select uuid(), VideoId,COUNT(1),AddDate from Coll_VideoHits
where AddDate = yestday
group by VideoId;
DELETE from Sum_VideoHits;
insert into Sum_VideoHits(Id,VideoId,Times,UpdateDate) select uuid(),VideoId,sum(Times),now() from Stat_VideoHits
group by VideoId;
delete from Coll_VideoHits WHERE AddDate<date_add(yestday, interval -3 day);
END
