在phpmyadmin的v4.5.5.1中，我运行以下mysql代码；

SELECT Date, DOW, Week, Year, logdate, Month, monum, netID, Logins, 
       creds, newb, netCnt, TOD, netCnt, activity
  FROM (SELECT logdate
              ,activity
              ,DATE( logdate )                      AS Date
              ,DAYOFWEEK( logdate )         AS DOW
              ,WEEK( logdate,0 )              AS Week
              ,YEAR( logdate )              AS Year
              ,DATE_FORMAT( logdate, '%M' )         AS Month
              ,DATE_FORMAT( logdate, '%m' )     AS monum
              ,CONVERT( netID,UNSIGNED INTEGER )    AS netID
              ,COUNT( callsign )                    AS Logins
              ,COUNT( IF(creds <> '',1,NULL) )  AS creds
              ,COUNT( IF(comments LIKE '%first log in%',1,NULL) ) AS newb
              ,count( DISTINCT netID )      AS netCnt
              ,SUM(  DISTINCT netID)            AS allCnt
              ,SEC_TO_TIME( SUM(timeonduty) )       AS TOD
         FROM NetLog
        WHERE netID <> 0 
          AND activity NOT LIKE '%TEST%'
          AND netcall LIKE '%W0KCN%'
          AND substr(logdate,1,4) = 2017
    GROUP BY Month, netID WITH ROLLUP ) AS t 
    ORDER BY t.logdate , logins

它运行得很好，我需要的东西都还回来了，但是。。。我在第3行的“from（select logdate）”处发现三个错误

我在第23行也得到了5个错误'组每月，netid与汇总）作为t'。。。

这些是什么意思？我应该解决它们吗？当然，我该如何解决它们？