Question

寻找一种避免错误消息的优雅方法无法对包含聚合或子查询的表达式执行聚合函数。

SELECT AccountName
 , SUM(CASE
       WHEN CallFlag = 1 AND Attempts < c.nMaxAttempts
           THEN 1
           ELSE 0
       END)CallRecords
 , SUM(CASE
       WHEN CRC IN(
                   SELECT szCRC COLLATE SQL_Latin1_General_CP1_CI_AS
                     FROM ContactCenter..CallDispositionMap
                     WHERE bBadRecord = 1)
           THEN 1
           ELSE 0
       END)BadRecords
FROM Calls;

Answer 1

您需要使用子选择。此外，您还需要在查询中使用Group BY。试试这个，

SELECT
  AccountName,
  SUM(CallRecords) AS CallRecords,
  SUM(BadRecords) AS BadRecords
FROM
  (
   SELECT AccountName
 , (CASE
       WHEN CallFlag = 1 AND Attempts < c.nMaxAttempts
           THEN 1
           ELSE 0
       END)CallRecords
 , (CASE
       WHEN CRC IN(
                   SELECT szCRC COLLATE SQL_Latin1_General_CP1_CI_AS
                     FROM ContactCenter..CallDispositionMap
                     WHERE bBadRecord = 1)
           THEN 1
           ELSE 0
       END)BadRecords
  FROM Calls) AS data
  GROUP BY AccountName

执行聚合子查询计划

1 个答案: