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このコードを試していますが、エラーが発生します:

Dim cmd3 As OleDbCommand = New OleDbCommand("INSERT INTO Criteria (Calculation, [Interval], Weight) VALUES (?, ?, ?)", Nordeen_Investing_3.con)
    cmd3.Parameters.AddWithValue("@Calculation", Calculation)
    cmd3.Parameters.AddWithValue("@[Interval]", Interval)
    cmd3.Parameters.AddWithValue("@Weight", "(SELECT (Avg(C." & Calculation & " * G.Growth) - Avg(C." & Calculation & ") * Avg(G.Growth)) / (StDevP(C." & Calculation & ") * StDevP(G.Growth)) AS Weight FROM " & Calculation & " AS C INNER JOIN " & Growth_Rate & " AS G " & On_Statement & ")")
    cmd3.ExecuteNonQuery()

これはエラーメッセージです：

Data type mismatch in criteria expression.

問題は次のコード行にあります。

cmd3.Parameters.AddWithValue("@Weight", "(SELECT (Avg(C." & Calculation & " * G.Growth) - Avg(C." & Calculation & ") * Avg(G.Growth)) / (StDevP(C." & Calculation & ") * StDevP(G.Growth)) AS Weight _ FROM " & Calculation & " AS C _ INNER JOIN " & Growth_Rate & " AS G _ " & On_Statement & ")")

Select Statementを が生成する値に置き換えるとSelect Statement、コードは正常に実行されます。

どうすればこれを機能させることができますか?

更新 以下の提案に基づいて、コードを次のように変更しました。

Dim cmd3 As OleDbCommand = New OleDbCommand("INSERT INTO Criteria (Calculation, [Interval], Weight) VALUES (?, ?, (SELECT (Avg(C." & Calculation & " * G.Growth) - Avg(C." & Calculation & ") * Avg(G.Growth)) / (StDevP(C." & Calculation & ") * StDevP(G.Growth)) AS Weight FROM " & Calculation & " AS C INNER JOIN " & Growth_Rate & " AS G " & On_Statement & "))", Nordeen_Investing_3.con)
    cmd3.Parameters.AddWithValue("@Calculation", Calculation)
    cmd3.Parameters.AddWithValue("@[Interval]", Interval)
    cmd3.ExecuteNonQuery()

新しいコードを実行すると、次のエラーが発生しました。

Unspecified error

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1 に答える 1

1

サブクエリを介してデータを挿入しようとしています。クエリの作成方法が正しくありません

それは次のようなものでなければなりません

INSERT INTO table1
SELECT id FROM table2
WHERE ...

特定のケースでは、OleDBCommand のクエリは次のようになります

"INSERT INTO Criteria (Calculation, [Interval], Weight)
SELECT ?, ?, (Avg(C." & Calculation & " * G.Growth) - Avg(C." & Calculation & ") * Avg(G.Growth)) / (StDevP(C." & Calculation & ") * StDevP(G.Growth)) AS Weight FROM " & Calculation & " AS C INNER JOIN " & Growth_Rate & " AS G " & On_Statement
于 2013-10-21T20:56:36.973 に答える