查詢服務表現問題

Question

使用Access 2003

查詢

SELECT t1.PERSONID  ,t1.CARDEVENTDATE 
     ,MIN(t2.CARDEVENTTIME) AS Intime 
     ,MAX(t3.CARDEVENTTIME) AS Outtime, 
Min(t3.Cardeventtime) as BreakOut, 
Max(t4.CardEventTime) as BreakIn 

FROM ((( SELECT PERSONID 
       , CARDEVENTDATE 
         FROM T_CARDEVENT) as t1 
LEFT OUTER JOIN (SELECT PERSONID 
           ,CARDEVENTDATE, FUNCTION 
            , CARDEVENTTIME 
         FROM T_CARDEVENT WHERE (FUNCTION = 'A')) as t2 
ON t1.PERSONID = t2.PERSONID 
      AND t1.CARDEVENTDATE = t2.CARDEVENTDATE) LEFT OUTER JOIN (SELECT PERSONID 
           ,CARDEVENTDATE, FUNCTION 
            , CARDEVENTTIME 
         FROM T_CARDEVENT WHERE (FUNCTION = 'D')) as t3 
ON t1.PERSONID = t3.PERSONID 
      AND t1.CARDEVENTDATE = t3.CARDEVENTDATE) LEFT OUTER JOIN (SELECT PERSONID 
           ,CARDEVENTDATE, FUNCTION 
            , CARDEVENTTIME 
         FROM T_CARDEVENT WHERE (FUNCTION = 'B')) as t4 
ON t1.PERSONID = t4.PERSONID 
      AND t1.CARDEVENTDATE = t4.CARDEVENTDATE) LEFT OUTER JOIN (SELECT PERSONID 
           ,CARDEVENTDATE, FUNCTION 
            , CARDEVENTTIME 
         FROM T_CARDEVENT WHERE (FUNCTION = 'C')) as t5 
ON t1.PERSONID = t5.PERSONID 
      AND t1.CARDEVENTDATE = t5.CARDEVENTDATE 

      GROUP BY t1.PERSONID, t1.CARDEVENTDATE 

當我運行上面的查詢，它正在採取太多的時間來查看結果，所以有時它是顯示錯誤消息「還不夠在內存中的臨時空間「

有任何其他的方式來訪問這樣的查詢。

需要查詢幫助

Answer 1

您的查詢是一個爛攤子......我不知道你打算做..所以這裏有一些亂撞，在回答中，而不是評論的形式是什麼..但因爲所有的連接被左外連接我無法格式化的意見..

..

我建議你嘗試玩這個：通過CARDEVENT一組：

select FUNCTION 
    , PERSONID 
    , min(cardeventdate) 
    , max(cardeventdate) 
    from T_CARDEVENT 
where FUNCTION in ('A','B','C','D') 
group by FUNCTION,PERSONID 

PS （對我來說）DATE和最小/最大值在同一領域沒有多大意義。