Question

我试图在一个SQL语句中做太多。我想在输出表的适当位置获得小计和总计。这是我的SQL;

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

（缩写）输出如下所示;

您会注意到每个月都会正确订购，直到您到达10月份。总计在10月之前而不是在结束之前（12月之后）排序。这是我可以在SQL中控制的东西，还是应该在PHP中修复它？我如何在SQL中修复它？

Answer 1

您的第二个字段logins将仅在第一个排序列的相等值内进行相应排序。否则，在第一列上排序优先级。尝试交换logdate和logins，看看发生了什么。

Answer 2

原来我需要一个CASE声明才能使其正常工作。

SELECT Date, DOW, Week, Year,  Month, monum, netID, Logins, 
       creds, newb, netCnt, TOD, activity, logdate,
       COALESCE (Month, 'GT') as MonthNM
  FROM (SELECT logdate
              ,activity
              ,DATE( logdate )                      AS Date
              ,DAYOFWEEK( logdate )                 AS DOW
              ,WEEK( logdate,0 )                    AS Week
              ,YEAR( logdate )                      AS Year
              ,MONTHNAME ( logdate )                AS Month
              ,MONTH( logdate )                     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 
     CASE
        WHEN MonthNM = 'GT' THEN  1
        ELSE 0
     END
        ,monum
        ,logins

MySQL ORDER BY问题

2 个答案: