Mysql 提取日期范围之间的点击次数

我想从bannerstatclick表中提取按时间（如按周或按月）单击的总数bannerstatclick表中有以下列（idBannerStats:integer，time:Timestamp，idCampaignBanner:char（36））。我想计算最长的时间为当前日期，然后计算30天之前的日期，然后找到多少没有点击之间的这个日期范围，它将不会返回任何输出

   SELECT count(idCampaignBanner) AS TotalClicks 
   FROM newradium.BannerStatsClick 
   WHERE Time BETWEEN   
   (Select max(`Time`) FROM newradium.BannerStatsClick)
  And
   (select max(`Time`)- INTERVAL 30 DAY FROM newradium.BannerStatsClick);

试试这个

set @max_time:= (SELECT  max(`Time`) FROM newradium.BannerStatsClick );

SELECT count(idCampaignBanner) AS TotalClicks 
   FROM newradium.BannerStatsClick 
   WHERE Time BETWEEN date_add(@max_time, INTERVAL 30 DAY) and @max_time;

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只需在单独的查询中选择max（time）。应该行得通。还有双

FROM

条款如何编写单独的查询？？？你能解释一下吗。。

set @max_time:= (SELECT  max(`Time`) FROM newradium.BannerStatsClick );

SELECT count(idCampaignBanner) AS TotalClicks 
   FROM newradium.BannerStatsClick 
   WHERE Time BETWEEN  dateadd(day,-30,@max_time) and @max_time