Ambigous錯誤c＃/ sql

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有人可以告訴我爲什麼我得到這個代碼錯誤？Ambigous錯誤c＃/ sql

SqlCommand scGetClaimedDetails = new SqlCommand(
    "SELECT SUM(isclaimable) as claimable, SUM(isclaimed) as claimed,SUM(total) as total from" + 
    " (SELECT CASE WHEN claimed = 'Y' THEN inv_amt *.45 END as isclaimed, (inv_amt *.45) as inclaimable, inv_amt as total from invasset" + 
    " INNER JOIN Invoice ON invoice.invoice = invasset.invoice WHERE invasset.asset_no = @AssetNumber) as D2", DataAccess.AssetConnection);

來源

2012-07-12 CHRISTOPHER MCCONVILLE

什麼是那個錯誤？請張貼它。 – 2012-07-12 13:03:45

除非你告訴我們什麼是錯誤_is_。此外，格式化您的代碼實際上是可讀的。當代碼可讀時，更容易發現代碼中的問題。 – David 2012-07-12 13:04:01

ambigous列名inv_amt – 2012-07-12 13:05:35

在其中inv_amt柱從未來子查詢specifiy（是invoice.inv_amt或invasset.inv_amt）

來源

2012-07-12 13:07:23

即時消息不缺少從表中，因爲這是一個子查詢 – 2012-07-12 13:09:05

我知道你不會錯過「從」表。在子查詢中，在選擇列表中，您具有列表inv_amt，該列在表invoice和invasset中具有相同名稱，您必須指定是指invoice.inv_amt還是invasset.inv_amt，將「inv_amt」替換爲「invoice.inv_amt」或「 invasset.inv_amt」。 – 2012-07-12 13:12:36

ambigous列名inv_amt

它接縫像兩個表invasset和Invoice都包含列inv_amt，您必須將其引用到內部SELECT語句中的別名，如：invoice.inv_amt或invasset.inv_amt：

SELECT SUM(isclaimable) as claimable, SUM(isclaimed) as claimed, 
     SUM(total) as total 
FROM 
( 
    SELECT CASE WHEN claimed = 'Y' THEN invoice.inv_amt *.45 END as isclaimed, 
    (inv_amt *.45) as inclaimable, inv_amt as total 
    from invasset INNER JOIN Invoice ON invoice.invoice = invasset.invoice 
    WHERE invasset.asset_no = @AssetNumber 
) as D2

來源

2012-07-12 13:08:26

當我格式化你的代碼是人類可讀......

SqlCommand scGetClaimedDetails = new SqlCommand(
    "SELECT 
     SUM(isclaimable) AS claimable, 
     SUM(isclaimed) AS claimed, 
     SUM(total) AS total 
    FROM 
     (SELECT 
       CASE WHEN claimed = 'Y' THEN inv_amt *.45 END AS isclaimed, 
       (inv_amt *.45) AS inclaimable, 
       inv_amt AS total 
      FROM 
       invasset 
       INNER JOIN Invoice ON invoice.invoice = invasset.invoice 
      WHERE 
       invasset.asset_no = @AssetNumber) AS D2", 
    DataAccess.AssetConnection);

我不禁注意到，你的外SELECT正在尋找一個叫列，而isclaimable你的內心SELECT正在返回一個名爲inclaimable的列。代碼中存在拼寫錯誤。

編輯：迴應對這個問題發表的意見，哪些表格包含inv_amt？顯然你引用了兩個表。由於您引用的唯一表格是invasset和Invoice，那麼顯然這兩個表格都有一個名爲inv_amt的列。你必須在你的查詢中指定你想要的。

所以不是：

`inv_amt AS total`

你想要的東西，如：

`invasset.inv_amt AS total`

（假設這是你想要的表，否則使用其他表。）

來源

2012-07-12 13:09:05 David

Ambigous錯誤c＃/ sql

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