关于问题......如果发生在同一日期,请选择列......我收到了这个答案
SELECT a.*
FROM LicenseHistory a
JOIN ( SELECT LicenseID, date as date, COUNT(DISTINCT IPAddress,LicenseID)
FROM LicenseHistory
WHERE (LicenseID= 24965)
GROUP BY LicenseID,Date
/*HAVING COUNT(DISTINCT IPAddress) > 1*/
)b
ON a.LicenseID = b.LicenseID
AND a.date = b.date
order by date desc, LicenseID desc
哪个返回了这些结果......
Date UniqueID Users IPAddress Country Count
2013-05-14 24965 15 70.60.96.98 US 1455
2013-05-14 24965 15 72.252.247.148 US 111
2013-03-29 24965 15 184.39.241.223 US 14
计数是非常错误的,因为一个简单的选择,比如......
SELECT COUNT(Distinct IPAddress) AS DistinctIPCount
FROM LicenseHistory WHERE (LicenseID=24965)
显示计数为 123。我需要此 SQL 来计算该 ID 在当天从该 IP 地址出现的次数。换句话说“ 24965 在 2013-05-14 使用 IP 70.60.96.98 出现了多少次”