2

複数の UNION クエリ:

SELECT [Ordine numero] AS ordine, [data ordine] AS data, comm AS commessa
FROM [archivio globale]
WHERE [ordine numero] IS NOT NULL

UNION

SELECT [numero ordine cliente] AS ordine, [data ordine cliente] AS data, numero AS commessa
FROM [ricambi]
WHERE [numero ordine cliente] IS NOT NULL

UNION

SELECT [numero ordine cliente] AS  ordine, [data ordine cliente] AS data, numero AS commessa
FROM [trasferte]
WHERE [numero ordine cliente] IS NOT NULL

ORDER BY [ordine];

動作しません: エラー メッセージが表示されます:

[mysql][odbc 5.1 Driver][mysqld-5.5.14]You have an error in your SQL syntax ...

1 つの UNION クエリが (2 番目の UNION ステートメントなしで) 正しく機能している間は? 何をすべきか？

4

3 に答える 3

1

質問にMySQLのタグを付け、角かっこを使用しています[]。私の知る限り、角かっこはMySQLには無効であり、Microsoft製品（SQL Server / MS Access）にのみ有効です。したがって、テーブル/列名を囲む必要がある場合は、バッククォートを使用して`ください。

ドキュメントから：

識別子の引用文字はバックティック（「 `」）です。

したがって、クエリは次のようになります。

SELECT `Ordine numero` AS ordine, `data ordine` AS data, comm AS commessa
FROM `archivio globale`
WHERE `ordine numero` IS NOT NULL

UNION ALL

SELECT `numero ordine cliente` AS ordine, `data ordine cliente` AS data, numero AS commessa
FROM `ricambi`
WHERE `numero ordine cliente` IS NOT NULL

UNION ALL

SELECT `numero ordine cliente` AS  ordine, `data ordine cliente` AS data, numero AS commessa
FROM `trasferte`
WHERE `numero ordine cliente` IS NOT NULL

ORDER BY `ordine`;

編集します。MSAccessを使用している場合は、角かっこを使用する必要があります。

SELECT *
FROM
(
  SELECT [Ordine numero] AS ordine, [data ordine] AS data, comm AS commessa
  FROM [archivio globale]
  WHERE [ordine numero] IS NOT NULL

  UNION ALL

  SELECT [numero ordine cliente] AS ordine, [data ordine cliente] AS data, numero AS commessa
  FROM [ricambi]
  WHERE [numero ordine cliente] IS NOT NULL

  UNION ALL

  SELECT [numero ordine cliente] AS  ordine, [data ordine cliente] AS data, numero AS commessa
  FROM [trasferte]
  WHERE [numero ordine cliente] IS NOT NULL
) x
ORDER BY [ordine];
于 2012-10-09T16:46:18.800 に答える
1

これは MyODBC のバグです。こちらの公式エントリを参照してください。今日も、まだ開いてる…

[編集] 簡単な解決策を見つけました: myODBC は ONE UNION(またはUNION ALL) のクエリのみを理解します。したがって、 の右側の部分を でラップする必要がありUNIONます()。;さらに、次のように、各クエリを で終了する必要があります。

SELECT [Ordine numero] AS ordine, [data ordine] AS data, comm AS commessa
FROM [archivio globale]
WHERE [ordine numero] IS NOT NULL;

UNION ALL (

SELECT [numero ordine cliente] AS ordine, [data ordine cliente] AS data, numero AS commessa
FROM [ricambi]
WHERE [numero ordine cliente] IS NOT NULL;

UNION ALL

SELECT [numero ordine cliente] AS  ordine, [data ordine cliente] AS data, numero AS commessa
FROM [trasferte]
WHERE [numero ordine cliente] IS NOT NULL
);

もちろん、この部分にも同じ方法を適用する必要があります。たとえば、UNION ALLクエリでもう 1 つ必要な場合:

SELECT [Ordine numero] AS ordine, [data ordine] AS data, comm AS commessa
FROM [archivio globale]
WHERE [ordine numero] IS NOT NULL;

UNION ALL (

SELECT [numero ordine cliente] AS ordine, [data ordine cliente] AS data, numero AS commessa
FROM [ricambi]
WHERE [numero ordine cliente] IS NOT NULL;

UNION ALL (

SELECT [numero ordine cliente] AS  ordine, [data ordine cliente] AS data, numero AS commessa
FROM [trasferte]
WHERE [numero ordine cliente] IS NOT NULL;

UNION ALL

SELECT [numero ordine cliente] AS  ordine, [data ordine cliente] AS data, numero AS commessa
FROM [xxx]
WHERE [numero ordine cliente] IS NOT NULL
));
于 2013-02-21T13:52:52.763 に答える