SQL Server查詢語法問題

Question

嗨任何一個可以給我解釋一下什麼毛病我查詢

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 

給出了這樣的錯誤消息：

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

Answer 1

我覺得這個查詢可以在一個更好的寫但我可以看到你沒有指定（DispatcherName）的子查詢的主要問題。

所以更改子查詢，如下

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

    ) AS Expr1 

你也可以改變所有查詢（但是這取決於你的需求）

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

它不是你的後完全清楚從原來​​的查詢，但是你不能在SQL-CE中使用嵌套選擇，除非它們返回一個集合（而不是標量值），所以應該嘗試類似;

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