SQL Server查询语法问题

Question

嗨任何一个可以给我解释一下什么毛病我查询

SELECT  
    cDispatcherName AS Name, 
    cCallNature AS EmergencyCall, 
    COUNT(cCallNature) AS Total, 
    (
     SELECT 
      COUNT(cCallNature) 
      FROM CallInfo 
      WHERE (cCallNature ='Regular call') 
     GROUP BY cCallNature 
    ) AS Expr1 
FROM   CallInfo 
WHERE  (cCallNature = 'Emergency call') 
GROUP BY cDispatcherName, cCallNature 

给出了这样的错误消息：

Errormsg::There was an error parsing the query. [ Token line number = 1,Token line offset = 93,Token in error = SELECT ]

Answer 1

我觉得这个查询可以在一个更好的写但我可以看到你没有指定（DispatcherName）的子查询的主要问题。

所以更改子查询，如下

(
     SELECT 
      COUNT(cCallNature) 
      FROM CallInfo rcall 
      WHERE (cCallNature ='Regular call' and rcall.cDispatcherName =CallInfo.CallInfo) 

    ) AS Expr1 

你也可以改变所有查询（但是这取决于你的需求）

SELECT  
    cDispatcherName AS Name, 
    COUNT(cCallNature) AS EmergencyCallTotal, 
    (
     SELECT 
      COUNT(cCallNature) 
      FROM CallInfo rcall 
      WHERE (cCallNature ='Regular call' and rcall.cDispatcherName =CallInfo.CallInfo) 
    ) AS RegularcallTotal 
FROM   CallInfo 
WHERE  (cCallNature = 'Emergency call') 
GROUP BY cDispatcherName 

Answer 2

它不是你的后完全清楚从原来​​的查询，但是你不能在SQL-CE中使用嵌套选择，除非它们返回一个集合（而不是标量值），所以应该尝试类似;

SELECT  
     CallInfo.cDispatcherName AS Name, 
     cCallNature AS EmergencyCall, 
     COUNT(cCallNature) AS Total, 
     SUB.CNT AS RegularCalls 
    FROM CallInfo 
    LEFT JOIN (
     SELECT 
      cDispatcherName, 
      COUNT(*) AS CNT 
     FROM CallInfo 
     WHERE cCallNature ='Regular call' 
     GROUP BY cDispatcherName 
    ) AS SUB ON CallInfo.cDispatcherName = SUB.cDispatcherName 

    WHERE cCallNature = 'Emergency call' 
    GROUP BY CallInfo.cDispatcherName, CallInfo.cCallNature, SUB.CNT