大型選擇字段選項限制我的計數功能

Question

我最近接管了一個職位來管理多個數據庫並創建多個報表。

我目前正在從以前的員工中分離出來的報告是在MS Visual Studio中開發的。嘗試從Demo_Chapter_Events.CE_EVENT_TYPE列中獲取總計數，以返回基於filter ='SOCIAL'的總數。

對於GROUP BY，COUNT（）返回多個錯誤。是否有更簡單的方法將COUNT（）函數與所有其他SELECT（ed）行一起使用？提前致謝。當前報告代碼列在下面。

SELECT  Name.ID AS Expr2, Name.MEMBER_TYPE, Name.STATUS, Name.COMPANY, Demo_Chapter.CH_UNIVERSITY, CONVERT(VARCHAR(10), 
         Demo_Chapter.CH_INSTALLED_DATE, 101) AS ChInstlDate, CONVERT(VARCHAR(10), Demo_Chapter.CH_INACTIVE_DATE, 101) AS ChInctvDate, 
         CONVERT(VARCHAR(10), Demo_Chapter.CH_SEC_INACTIVE_DATE, 101) AS ChSecDate, CONVERT(VARCHAR(10), Demo_Chapter.CH_REINSTALLED_DATE, 101) 
         AS ChReInstall, CONVERT(VARCHAR(10), Demo_Chapter.CH_THIRD_INSTALL, 101) AS ThrdInstall, CONVERT(VARCHAR(10), Demo_Chapter.CH_FOURTH_INSTALL, 
         101) AS FrthInstall, CONVERT(VARCHAR(10), Demo_Chapter.CH_TH_INACTIVE_DATE, 101) AS ThInctvDate, Demo_Chapter.CH_TH_INACTIVE_REASON, 
         CONVERT(VARCHAR(10), Demo_Chapter.CH_FR_INACTIVE_DATE, 101) AS FrInctvDate, Demo_Chapter.CH_FR_INACTIVE_REASON, 
         Demo_Chapter.CH_CARNEGIE_BASIC, Demo_Chapter.CH_CARNEGIE_SS, Demo_Chapter.CH_CARNEGIE_UNDER, Demo_Chapter.CH_CARNEGIE_ENROLL, 
         Demo_Chapter.CH_ATHL_CONF, Demo_Chapter.CH_UG_ENROLL, Demo_Chapter.CH_NUM_WMN_STUD, Demo_Chapter.CH_SEC_INACTIVE_REASON, 
         Demo_Chapter.CH_INACTIVE_REASON, Demo_Chapter.CH_RECRUIT_TIME, Demo_Chapter.CH_TERMS, Demo_Academic.AA_CHAPTER_GPA, 
         Demo_Academic.AA_TERM, Demo_Academic.AA_YEAR, CONVERT(VARCHAR(10), Demo_Chapter_Events.CE_EVENT_DATE, 101) AS EvntDate, 
         Demo_Chapter_Events.CE_EVENT_TYPE 
FROM   Name INNER JOIN 
         Demo_Chapter ON Name.ID = Demo_Chapter.ID INNER JOIN 
         Demo_Chapter_Events ON Name.ID = Demo_Chapter_Events.ID LEFT OUTER JOIN 
         Demo_Academic ON Name.ID = Demo_Academic.ID 
WHERE  (Name.MEMBER_TYPE = 'CCHP') AND (Name.STATUS IN ('A', 'SUSP')) AND (Demo_Academic.AA_TERM = 'SPRING') AND (Demo_Academic.AA_YEAR = '1415') AND 
         (Demo_Chapter_Events.CE_EVENT_DATE BETWEEN CONVERT(DATETIME, '2015-08-01 00:00:00', 102) AND CONVERT(DATETIME, '2015-12-31 00:00:00', 102)) AND (Demo_Chapter_Events.CE_EVENT_TYPE = 'SOCIAL') 

Answer 1

重新格式化您的代碼以實現可讀性：使用內聯視圖來獲取ce_Event_Types的數量並且僅限於社交活動;將該表的所有限制標準移至該內嵌視圖。

這種方法消除了由於狂犬病問題引起的人爲計數膨脹問題。

SELECT Name.ID AS Expr2 
, Name.MEMBER_TYPE 
, Name.STATUS 
, Name.COMPANY 
, Demo_Chapter.CH_UNIVERSITY 
, CONVERT(VARCHAR(10), Demo_Chapter.CH_INSTALLED_DATE, 101) AS ChInstlDate 
, CONVERT(VARCHAR(10), Demo_Chapter.CH_INACTIVE_DATE, 101) AS ChInctvDate 
, CONVERT(VARCHAR(10), Demo_Chapter.CH_SEC_INACTIVE_DATE, 101) AS ChSecDate 
, CONVERT(VARCHAR(10), Demo_Chapter.CH_REINSTALLED_DATE, 101) AS ChReInstall 
, CONVERT(VARCHAR(10), Demo_Chapter.CH_THIRD_INSTALL, 101) AS ThrdInstall 
, CONVERT(VARCHAR(10), Demo_Chapter.CH_FOURTH_INSTALL, 101) AS FrthInstall 
, CONVERT(VARCHAR(10), Demo_Chapter.CH_TH_INACTIVE_DATE, 101) AS ThInctvDate 
, Demo_Chapter.CH_TH_INACTIVE_REASON 
, CONVERT(VARCHAR(10), Demo_Chapter.CH_FR_INACTIVE_DATE, 101) AS FrInctvDate 
, Demo_Chapter.CH_FR_INACTIVE_REASON 
, Demo_Chapter.CH_CARNEGIE_BASIC 
, Demo_Chapter.CH_CARNEGIE_SS 
, Demo_Chapter.CH_CARNEGIE_UNDER 
, Demo_Chapter.CH_CARNEGIE_ENROLL 
, Demo_Chapter.CH_ATHL_CONF 
, Demo_Chapter.CH_UG_ENROLL 
, Demo_Chapter.CH_NUM_WMN_STUD 
, Demo_Chapter.CH_SEC_INACTIVE_REASON 
, Demo_Chapter.CH_INACTIVE_REASON 
, Demo_Chapter.CH_RECRUIT_TIME 
, Demo_Chapter.CH_TERMS 
, Demo_Academic.AA_CHAPTER_GPA 
, Demo_Academic.AA_TERM 
, Demo_Academic.AA_YEAR 
, CONVERT(VARCHAR(10), Demo_Chapter_Events.CE_EVENT_DATE, 101) AS EvntDate 
, DEC.CE_EVENT_TYPE 
, DEC.cnt 
FROM Name 
INNER JOIN Demo_Chapter 
    ON Name.ID = Demo_Chapter.ID 
INNER JOIN (SELECT id, count(CE_EVENT_TYPE) as cnt, CE_EVENT_TYPE 
      FROM Demo_Chapter_Events 
      WHERE CE_EVENT_TYPE = 'SOCIAL' 
       AND Demo_Chapter_Events.CE_EVENT_DATE BETWEEN 
        CONVERT(DATETIME, '2015-08-01 00:00:00', 102) 
       AND CONVERT(DATETIME, '2015-12-31 00:00:00', 102) 
      GROUP BY id, CE_EVENT_TYPE) DCE 
    ON Name.ID = DCE.ID 
LEFT OUTER JOIN Demo_Academic 
    ON Name.ID = Demo_Academic.ID 
WHERE (Name.MEMBER_TYPE = 'CCHP') 
    AND (Name.STATUS IN ('A', 'SUSP')) 
    AND (Demo_Academic.AA_TERM = 'SPRING') 
    AND (Demo_Academic.AA_YEAR = '1415')