Question

我正在尝试创建报告，并希望从表格“联系人”中提取一些信息。我试图提取与联系人有关的“顾问”以及根据一系列标准拥有该顾问的联系人数量。这很好并且有效，但是，我想拉出第三列，它也是基于不同标准集的“计数”。这是我遇到麻烦的地方。

目前，我在下面列出了“无法解析查询文本”的信息：

SELECT  advisoridName AS Advisor,
  COUNT(*) WHERE (advisorid IS NOT NULL) AND (ContactType = 1) AND (StateCode = 0) AS 'Active Participants',
  COUNT(*) WHERE (advisorid IS NOT NULL) AND (ContactType = 1) AS 'Total Participants'
FROM Contact
GROUP BY  advisoridName, advisorid
ORDER BY  PDA

如果你能引导我朝着正确的方向前进，我们将不胜感激。

提前致谢

Answer 1

COUNT(*)不是有条件的，至少不是在TSQL中。我建议使用SUM(CASE WHEN ... - 就像这样：

SELECT  advisoridName AS Advisor,
  SUM(CASE WHEN (advisorid IS NOT NULL) AND (ContactType = 1) AND (StateCode = 0) 
           THEN 1
           ELSE 0
      END) AS 'Active Participants',
  SUM(CASE WHEN (advisorid IS NOT NULL) AND (ContactType = 1) 
           THEN 1
           ELSE 0
      END) AS 'Total Participants'
FROM Contact
GROUP BY  advisoridName, advisorid
ORDER BY  PDA

Answer 2

您可以使用COUNT执行相同的操作，但不需要GROUP BY

SELECT COUNT (CASE when advisorid IS NOT NULL AND ContactType = 1 AND StateCode = 0 THEN AdvisorID END ) as ActiveParticipants,
COUNT (CASE when advisorid IS NOT NULL AND ContactType = 1 THEN AdvisorID) as TotalParticipants
FROM Contact
ORDER By PDA

SQL执行错误 - 无法解析查询文本

2 个答案: