Question

我最近接管了一个职位来管理多个数据库并创建多个报告。

我目前正在攻击前一名员工的报告是在MS Visual Studio中开发的。尝试从Demo_Chapter_Events.CE_EVENT_TYPE列中获取总计数，以根据filter ='SOCIAL'返回总计。

COUNT（）返回有关GROUP BY的多个错误。是否有更简单的方法将COUNT（）函数应用于所有其他SELECT（ed）行？提前致谢。当前报告代码如下所列。

for (String line : Files.realAllLines(Paths.get(filename)) {
  Student st = new Student();
  String[] data= line.split(";");
  int id = Integer.parseInt(data[0]);
  st.setId(id);
}

Answer 1

为了我的可读性，重新格式化了代码：使用内联视图获取ce_Event_Types的数量并仅限于社交;将该表的所有限制条件移至该内联视图。

这种方法消除了由于肉体问题引起的人为计数通胀问题。

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')

大选择字段选项限制了我的计数功能

1 个答案: