用戶的mysql統計數據 - 如何獲取每個日期範圍的列？

Question

我有一個查詢3個表：

apiusers，用戶

• 這些包含用戶ID和名稱。

download_stats：

此包含的用戶類型（1 =用戶，2 = apiusers），日期，文件downloaded_id。

我想要做的是得到一個佈局：

|用戶ID |名稱|下載1月的統計信息|下載統計二月

等

我目前正在此查詢，這需要永遠嘗試：

SELECT name,queryuserid,count(ROWA.id) ,count(ROWB.id) 
FROM (SELECT IFNULL(u.name, au.companyname) AS name,IFNULL(u.id, au.id) AS queryuserid 
    FROM apiusers as au, users as u 
    GROUP BY 2) AS users 
LEFT JOIN stats_download as ROWA ON ROWA.userid=queryuserid AND ROWA.date > date('2011-01-01') AND ROWA.date < date('2011-02-01') 
LEFT JOIN stats_download as ROWB ON ROWB.userid=queryuserid AND ROWB.date > date('2011-01-01') AND ROWB.date < date('2011-02-01') 
GROUP BY 2; 

有沒有要去這個更好的辦法？客戶希望支持按年，月和日「分組」輸出統計數據。所以那裏可能有30+的LEFT JOIN。

Answer 1

這應該得到你的基礎，並運行一整年的樣本。看看這個模式。通過執行返回1或0的合格IF（）條件的總和，您可以獲得每月的總計數。現在，如果您正在查找SIZE（如下載大小），而不是1,0，則可以替換fileSize而不是1，然後您將獲得總下載大小......將它們放在不同的列中，您可以同時擁有下載次數和下載次數。擴大日期範圍一年，只是繼續與模式...

SELECT 
     AllUsers.Name, 
     AllUsers.QueryUserID, 
     SUM(if(SD.Date BETWEEN '2011-01-01' and '2011-01-31', 1, 0)) as CountJan2011, 
     SUM(if(SD.Date BETWEEN '2011-02-01' and '2011-02-28', 1, 0)) as CountFeb2011, 
     SUM(if(SD.Date BETWEEN '2011-03-01' and '2011-03-31', 1, 0)) as CountMar2011, 
     SUM(if(SD.Date BETWEEN '2011-04-01' and '2011-04-30', 1, 0)) as CountApr2011, 
     SUM(if(SD.Date BETWEEN '2011-05-01' and '2011-05-31', 1, 0)) as CountMay2011, 
     SUM(if(SD.Date BETWEEN '2011-06-01' and '2011-06-30', 1, 0)) as CountJun2011, 
     SUM(if(SD.Date BETWEEN '2011-07-01' and '2011-07-31', 1, 0)) as CountJul2011, 
     SUM(if(SD.Date BETWEEN '2011-08-01' and '2011-08-31', 1, 0)) as CountAug2011, 
     SUM(if(SD.Date BETWEEN '2011-09-01' and '2011-09-30', 1, 0)) as CountSep2011, 
     SUM(if(SD.Date BETWEEN '2011-10-01' and '2011-10-31', 1, 0)) as CountOct2011, 
     SUM(if(SD.Date BETWEEN '2011-11-01' and '2011-11-30', 1, 0)) as CountNov2011, 
     SUM(if(SD.Date BETWEEN '2011-12-01' and '2011-12-31', 1, 0)) as CountDec2011 
    FROM 
     (select distinct 
       APIUsers.CompanyName as Name, 
       APIUsers.QueryUserID 
      from APIUsers 
     UNION 
     select 
       Users.Name, 
       Users.QueryUserID 
      from Users) AllUsers 

     LEFT JOIN stats_download SD 
      ON AllUsers.QueryUserID = SD.UserID 
     AND SD.Date BETWEEN '2011-01-01' and '2011-12-31' 
    GROUP BY 
     2; 

Answer 2

有一個更好的方法。

你需要做的只是一個與stats_download和彙總上月加盟，我認爲得到月從日期中提取月份的方法（每個數據庫都有自己的方法，你沒有指定你使用的是什麼）

(
SELECT name,queryuserid,count(stats_download.id) as cnt,GETMONTH(stats_download.date) as month 
FROM (SELECT IFNULL(u.name, au.companyname) AS name,IFNULL(u.id, au.id) AS queryuserid 
    FROM apiusers as au, users as u 
    GROUP BY 2) AS users 
LEFT JOIN stats_download ON stats_download.userid=queryuserid 
GROUP BY name, queryuserid, GETMONTH(stats_download.date) 
) as TableA 

那麼現在我們要根據不同羣體創建列的表，所以我們內部聯接與自身表（要快很多，因爲這個表是小）

Select name, queryuserid, A.cnt as January, B.cnt as February from TableA left join TableA as A on (TableA.queryuserid = A.queryuserid and A.month=1) left join TableA as B on (TableA.queryuserid = B.queryuserid and B.month=2) 

我沒有運行它，所以我可能有一些錯別字，但這是直接的灰。 希望它有幫助...