您已將問題標(biāo)記為MySQL,并使用方括號[].據(jù)我所知,方括號對MySQL無效,僅對Microsoft產(chǎn)品有效(SQL Server / MS Access).因此,如果您需要使用反引號括起表/列名稱.

The identifier quote character is the backtick (“`”):

所以我認(rèn)為您的查詢應(yīng)該是：

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`;

編輯,如果您使用MS Access,則需要使用方括號：

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];

總結(jié)

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