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私自身の啓蒙のために、一時テーブルを使用せずに、このSQL機能を単一のステートメントで記述しようとしています。私の人生では、MySQLを取得せずにクエリを機能させることはできません。「エラー1248（42000）：すべての派生テーブルには独自のエイリアスが必要です。」

これは、壊れているとはいえ、私が欲しいものに似たものです：

SELECT split.share, split.weight, split.creditor, split.debtor, share.amount, wsum.sum
FROM (
    SELECT split.share, split.weight, split.creditor, split.debtor, share.amount
    FROM ( split LEFT JOIN share ON split.share = share.id )
    WHERE debtor = 6 OR creditor = 6 )
    LEFT JOIN (
        SELECT split.share, SUM(weight) AS sum
        FROM split
        GROUP BY split.share
    ) wsum
    ON split.share = wsum.share;

これは、一時テーブルを使用して表現しようとしているものの作業バージョンです。

CREATE TEMPORARY TABLE weightsum (share INT, sum INT);

INSERT INTO weightsum (share, sum)
SELECT split.share, SUM(weight) AS sum
FROM split
GROUP BY split.share;

CREATE TEMPORARY TABLE summary (share INT, weight INT, creditor INT, debtor INT, amount DECIMAL(10,2));

INSERT INTO summary (share, weight, creditor, debtor, amount)
SELECT split.share, split.weight, split.creditor, split.debtor, share.amount
FROM (split LEFT JOIN share ON split.share = share.id)
WHERE debtor = 6 OR creditor = 6;

SELECT summary.share, summary.weight, weightsum.sum, summary.creditor, summary.debtor, summary.amount, ((summary.amount / weightsum.sum) * summary.weight) AS split_amount
FROM summary LEFT JOIN weightsum
ON summary.share = weightsum.share;

助けてくれてありがとう。

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1 に答える 1

0

これを試して：

SELECT split.share, split.weight, split.creditor, split.debtor, share.amount, wsum.sum
FROM (
    SELECT split.share, split.weight, split.creditor, split.debtor, share.amount
    FROM split 
    LEFT JOIN share 
    ON split.share = share.id
    WHERE debtor = 6 OR creditor = 6 
) As split
LEFT JOIN (
    SELECT split.share, SUM(weight) AS sum
    FROM split
    GROUP BY split.share
) wsum
ON split.share = wsum.share;

またはより正確に書かれています：

SELECT split.share, split.weight, split.creditor, split.debtor, share.amount, wsum.sum
FROM split 
LEFT JOIN share 
ON split.share = share.id 
LEFT JOIN (
    SELECT split.share, SUM(weight) AS sum
    FROM split
    GROUP BY split.share
) wsum
ON split.share = wsum.share
WHERE split.debtor = 6 OR split.reditor = 6;
于 2011-01-30T00:28:21.423 に答える