SQL內加入以計數（）和窗口函數

Question

;WITH n AS 
( 
    SELECT problemID, StationName, problemCode, ProblemCreateDate, probCount, 
    c = COUNT(*) OVER (PARTITION BY StationName, problemCode), 
    rn = ROW_NUMBER() OVER 
    ( 
     PARTITION BY StationName, problemCode ORDER BY ProblemCreateDate DESC, problemID DESC 
    ) 
    FROM dbo.tblProblems 
) 
SELECT problemID, StationName, problemCode, ProblemCreateDate, c 
FROM n WHERE rn = 1; 

有一個名爲tblCustomers另一個表，與列isAssistent類型（bit）

我試圖做內部聯接，但是這對我來說太複雜了，我得到一個嘗試與

tblCustomers where tblCustomers.isAssistent =1 

我會非常感激和高興適用的inner join過濾器知道如何編寫正確的語法時出現錯誤

重新編輯

inner join tblCustomers on tblProblems.CustID = tblCustomers.custID 

錯誤，我的最後嘗試的一個

消息4104，級別16，狀態1，行14多部分組成的標識符 「tblProblems.CustID」 無法綁定。消息4104，級別16，狀態1， 行12多部分標識符「tblproblems.problemID」不能爲 界限。消息4104，級別16，狀態1，行12多部分標識符 「tblproblems.custID」無法綁定。消息4104，級別16，狀態1， 行12多部分標識符「tblproblems.StationName」不能綁定到 。消息4104，級別16，狀態1，行12多部分 標識符「tblproblems.problemCode」無法綁定。 Msg 4104, Level 16，State 1，Line 12多部分標識符 「tblproblems.ProblemCreateDate」無法綁定。

這是野生的猜測我做：

;WITH n AS 
( 
    SELECT tblCustomers.*,tblproblems.problemID, tblproblems.StationName, tblproblems.problemCode, tblproblems.ProblemCreateDate, tblproblems.probCount, 
    c = COUNT(*) OVER (PARTITION BY tblproblems.StationName, tblproblems.problemCode), 
    rn = ROW_NUMBER() OVER 
    ( 
     PARTITION BY tblproblems.StationName, tblproblems.problemCode ORDER BY tblproblems.ProblemCreateDate DESC, tblproblems.problemID DESC 
    ) 
    FROM dbo.tblProblems 
    inner join tblCustomers on tblProblems.CustID = tblCustomers.custID 
) 
SELECT tblCustomers.*, tblproblems.problemID, tblproblems.custID, tblproblems.StationName, tblproblems.problemCode, tblproblems.ProblemCreateDate, c 
FROM n 
inner join tblCustomers on tblProblems.CustID = tblCustomers.custID 
WHERE rn = 1; 

的目的是爲了有tblProblems的選擇結果，只有當tblCustomers.isAssistent = 1

Answer 1

你用錯了，它應該外面查詢be

SELECT tblCustomers.*, n.problemID, n.custID, 
      n.StationName, n.problemCode, n.ProblemCreateDate, c 
FROM n 
inner join tblCustomers on n.CustID = tblCustomers.custID 
WHERE rn = 1; 

爲什麼你再次加入tblcustomers？

你可以這樣做：

;WITH n AS 

( 
    SELECT tblCustomers.*,tblproblems.problemID, tblproblems.StationName, 
     tblproblems.problemCode, tblproblems.ProblemCreateDate, 
     tblproblems.probCount, 
    c = COUNT(*) OVER 
     (PARTITION BY tblproblems.StationName, tblproblems.problemCode), 
    rn = ROW_NUMBER() OVER 
    ( 
     PARTITION BY tblproblems.StationName, tblproblems.problemCode 
     ORDER BY tblproblems.ProblemCreateDate DESC, tblproblems.problemID DESC 
    ) 
    FROM dbo.tblProblems 
    inner join tblCustomers on tblProblems.CustID = tblCustomers.custID 
    WHERE tblCustomers.isAssistent =1 

) 
SELECT n.* FROM n where rn = 1 

如果你只需要所引發的問題數據

;WITH n AS 

( 
    SELECT tblproblems.problemID, tblproblems.StationName, 
     tblproblems.problemCode, tblproblems.ProblemCreateDate, 
     tblproblems.probCount, 
    c = COUNT(*) OVER 
     (PARTITION BY tblproblems.StationName, tblproblems.problemCode), 
    rn = ROW_NUMBER() OVER 
    ( 
     PARTITION BY tblproblems.StationName, tblproblems.problemCode 
     ORDER BY tblproblems.ProblemCreateDate DESC, tblproblems.problemID DESC 
    ) 
    FROM dbo.tblProblems 
    inner join tblCustomers on tblProblems.CustID = tblCustomers.custID 
    WHERE tblCustomers.isAssistent =1 

) 
SELECT n.* FROM n where rn = 1