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title ALTER TABLE Statement | Microsoft Docs
ms.custom
ms.date 01/19/2017
ms.prod sql
ms.prod_service connectivity
ms.reviewer
ms.technology connectivity
ms.topic conceptual
helpviewer_keywords
SQL grammar [ODBC], ALTER TABLE
ALTER TABLE [ODBC]
ms.assetid 9cfa6ea3-7e33-46c7-99fd-3c717fbcc4e6
author David-Engel
ms.author v-daenge

ALTER TABLE Statement

When the Microsoft Access, dBASE, or Paradoxdriver is used, the ALTER TABLE statement is supported with add and drop table constraint definition clauses. (ALTER TABLE statements are not supported for the Microsoft Excel or Text drivers.)

Note

When you use the Paradox driver without implementing the Borland Database Engine, ALTER TABLE statements are not supported; only read and append statements are allowed.