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かなり複雑な SQL クエリがあり、多数の列を返す必要があり、それぞれがテーブルの異なる行を表しています。そのアカウントのテーブルのみを戻すには、すべての派生テーブルを値でフィルター処理する必要があります。以下はうまく機能します：

SELECT CurrentBalance.Value,
       CurrentBalance.Customer,
       Debt30Balance.Value    AS Expr1,
       Debt30Balance.Customer AS Expr2,
       Debt60Balance.Value    AS Expr3,
       Debt60Balance.Customer AS Expr4,
       Debt90Balance.Value    AS Expr5,
       Debt90Balance.Customer AS Expr6,
       WIPCurrent.Value       AS Expr7,
       WIPCurrent.Customer    AS Expr8,
       WIP30Days.Value        AS Expr9,
       WIP30Days.Customer     AS Expr10,
       WIP60Days.Value        AS Expr11,
       WIP60Days.Customer     AS Expr12,
       WIP90Days.Value        AS Expr13,
       WIP90Days.Customer     AS Expr14
FROM   (SELECT TOP (1) Value,
                       Customer
        FROM   DebtBreakdown
        WHERE  ( Customer = @CustomerID )
               AND ( Type = 0 )
        ORDER  BY Timestamp DESC) AS CurrentBalance
       INNER JOIN (SELECT TOP (1) Value,
                                  Customer
                   FROM   DebtBreakdown AS DebtBreakdown_7
                   WHERE  ( Customer = @CustomerID )
                          AND ( Type = 1 )
                   ORDER  BY Timestamp DESC) AS Debt30Balance
         ON CurrentBalance.Customer = Debt30Balance.Customer
       INNER JOIN (SELECT TOP (1) Value,
                                  Customer
                   FROM   DebtBreakdown AS DebtBreakdown_6
                   WHERE  ( Customer = @CustomerID )
                          AND ( Type = 2 )
                   ORDER  BY Timestamp DESC) AS Debt60Balance
         ON Debt30Balance.Customer = Debt60Balance.Customer
       INNER JOIN (SELECT TOP (1) Value,
                                  Customer
                   FROM   DebtBreakdown AS DebtBreakdown_5
                   WHERE  ( Customer = @CustomerID )
                          AND ( Type = 3 )
                   ORDER  BY Timestamp DESC) AS Debt90Balance
         ON Debt60Balance.Customer = Debt90Balance.Customer
       INNER JOIN (SELECT TOP (1) Value,
                                  Customer
                   FROM   DebtBreakdown AS DebtBreakdown_4
                   WHERE  ( Customer = @CustomerID )
                          AND ( Type = 4 )
                   ORDER  BY Timestamp DESC) AS WIPCurrent
         ON Debt90Balance.Customer = WIPCurrent.Customer
       INNER JOIN (SELECT TOP (1) Value,
                                  Customer
                   FROM   DebtBreakdown AS DebtBreakdown_3
                   WHERE  ( Customer = @CustomerID )
                          AND ( Type = 5 )
                   ORDER  BY Timestamp DESC) AS WIP30Days
         ON WIPCurrent.Customer = WIP30Days.Customer
       INNER JOIN (SELECT TOP (1) Value,
                                  Customer
                   FROM   DebtBreakdown AS DebtBreakdown_2
                   WHERE  ( Customer = @CustomerID )
                          AND ( Type = 6 )
                   ORDER  BY Timestamp DESC) AS WIP60Days
         ON WIP30Days.Customer = WIP60Days.Customer
       INNER JOIN (SELECT TOP (1) Value,
                                  Customer
                   FROM   DebtBreakdown AS DebtBreakdown_1
                   WHERE  ( Customer = @CustomerID )
                          AND ( Type = 7 )
                   ORDER  BY Timestamp DESC) AS WIP90Days
         ON WIP60Days.Customer = WIP90Days.Customer

ただし、指定されたパラメーター以外のものをフィルター処理できる必要があります。基本的に、私がやりたいことは、顧客の名前などのパラメーターを指定して顧客レコードを選択し、ID を選択して、それを派生テーブルに使用することです。Join を試してみましたが、派生テーブルはどの結合の範囲にもありません。

何か案は？

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1 に答える 1

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少なくともSQLServer2005を使用している場合（括弧で囲まれた式からのように思われTOPます）、派生テーブルの代わりに共通テーブル式を使用できます。

/*Any previous statement must be terminated with a semi colon*/
WITH CurrentBalance
     AS (SELECT TOP (1) Value,
                        Customer
         FROM   DebtBreakdown
         WHERE  ( Customer = @CustomerID )
                AND ( Type = 0 )
         ORDER  BY Timestamp DESC), /*Comma delimit CTE definitions*/
     Debt30Balance
     AS (SELECT TOP (1) Value,
                        Customer
         FROM   DebtBreakdown AS DebtBreakdown_7
         WHERE  ( Customer = @CustomerID )
                AND ( Type = 1 )
         ORDER  BY Timestamp DESC)
        /* ETC ETC */

同じクエリでCTEを複数回参照できます。

于 2011-10-10T15:21:09.013 に答える