根据下面的代码，我想帮助找出一种可以在一分钟内计算max_concrncy计数的方法。目前的查询每天返回计数，我很难尝试获得基于分钟的计数。
SELECT cast(to_char(date,'MM-DD-YYYY') as date) log_dt ,initcap(url),
url,count(userid) tot_hits,count(distinct userid) unq_hits,
count (cast(to_char(date,'MM-01-YYYY hh:mi:00') as date))as max_concrncy
**// i need max of count (cast(to_char(date,'MM-01-YYYY hh:mi:00') as date)) as max_concrncy here**
,case when httpstatuscode>=100 and httpstatuscode<=199 then httpstatuscode
else null end as sts_cd_100
,case when httpstatuscode>=200 and httpstatuscode<=299 then httpstatuscode
else null end as sts_cd_200
,case when httpstatuscode>=300 and httpstatuscode<=399 then httpstatuscode
else null end as sts_cd_300
,case when httpstatuscode>=400 and httpstatuscode<=499 then httpstatuscode else null end as sts_cd_400
,case when httpstatuscode>=500 and httpstatuscode<=599 then httpstatuscode
else null end as sts_cd_500
FROM sp01.apps_log_temp where initcap(url)='/766/sigma/data.Ashx'
and userid <> '-' group by cast(to_char(date,'MM-DD-YYYY') as date),httpstatuscode
以下是查询返回的输出。突出显示的数据是max_concrncy值，实际应该是25和14，我在计算分钟值时计算出来。
date url tothit unqhit max_concrncy httpstatuscode
2014-01-31 /766/sigma/data.Ashx 75 2 **75** 200
2014-01-30 /766/sigma/data.Ashx 50 1 **50** 200
添加输入数据。
date httpstatuscode url
2014-01-31 00:01:51 200 /766/sigma/data.ashx
2014-01-31 00:01:52 200 /766/sigma/data.ashx
2014-01-31 00:01:52 400 /766/sigma/data.ashx
2014-01-31 00:25:57 200 /766/sigma/data.ashx
2014-01-30 00:01:51 300 /766/sigma/data.ashx
2014-01-30 00:01:52 200 /766/sigma/data.ashx
2014-01-30 00:01:52 200 /766/sigma/data.ashx
2014-01-30 00:25:57 200 /766/sigma/data.ashx
对不起这个问题很久了。感谢您的答复。