Question

I have 3 tables in a query:

apiusers, users

• these contain a user id, and a name.

download_stats:

this contains usertype (1 = users, 2 = apiusers), date, file downloaded_id.

What I want to do is get a layout of:

| user id | name | download stats for january | download stats for february

etc.

I’m currently trying with this query, which takes forever:

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;

Is there a better way of going about this? The client wants supports to “group” the output statistics by year, month and day. So there could potentionally be 30+ LEFT JOIN’s in there.

Answer 1

This should get you the basis, and runs an entire year sample. Look at the pattern. By doing a sum of a qualified IF() condition returning 1 or 0 you get the total count per each month. Now, if you are looking for SIZE (such as download size), instead of 1, 0, you can just substitute the fileSize instead of 1 and you’ll have the total downloaded size… put them as different columns and you can have both Count of downloads and totalSize of downloads. Expand the date range over year, just keep going with the pattern…

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;