http://blog.itpub.net/29254281/viewspace-2149120/
接前文

前文有一块写多余了
纠正如下

王工优化的版本如下，确实是效率又高,可读性又好,整体还更精炼.

select
case
when starttime is null then '汇总'
else ''
end l,
ifnull(starttime, minstarttime) starttime,
ifnull(endtime, maxendtime) endtime,
`中奖数量`,`抽奖数量`
from(
select
ceil(t1.id/15) l,
starttime,
endtime,
sum(ifnull(`中奖数量`,0)) `中奖数量`,
sum(ifnull(`抽奖数量`,0)) `抽奖数量`,
min(starttime) minstarttime,
max(endtime) maxendtime
from (
select
id,
'2017-12-21 09:30:00'+ interval (id-1) minute starttime,
'2017-12-21 09:30:59'+ interval (id-1) minute endtime
from nums,
(select @rn:=0,@starttime:='',@endtime:='',@c1:=-1,@c2:=-1) vars
where id<=10000
AND
('2017-12-21 09:30:00'+ interval (id-1) minute)<=
(select max(actiontime)+interval '15' minute FROM award_gift_record WHERE awardactId=235)
) t1
left join
(
SELECT
date_format(actiontime,'%Y-%m-%d %H:%i:00') 时间,
count(case when AwardGiftID!=-1 then 1 else null end) 中奖数量,
count(AwardGiftID) 抽奖数量
FROM award_gift_record
WHERE awardactId=235
group by date_format(actiontime,'%Y-%m-%d %H:%i:00')
) t2 on(t2.时间 between t1.starttime and endtime)
group by l,starttime,endtime with rollup having
(
(endtime is null and starttime is null)
or
(starttime is not null and endtime is not null)
)
) result;

ITPub博客

每隔15行生成一个汇总行(王工优化版)