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Datatype Property

Cette fonctionnalité sera supprimée dans une prochaine version de Microsoft SQL Server. Évitez d'utiliser cette fonctionnalité dans de nouveaux travaux de développement et prévoyez de modifier les applications qui utilisent actuellement cette fonctionnalité.

The Datatype property exposes the data type name for the referenced column.

Syntaxe

object.Datatype [=value]

Parts

  • object
    An expression that evaluates to an object in the Applies To list

  • value
    A text string that identifies a Microsoft SQL Server system or user-defined data type

Data Type

String

Modifiable

Read/write before column creation. Read-only when referencing an existing column.

Prototype (C/C++)

HRESULT GetDatatype(SQLDMO_LPBSTR pRetVal);
HRESULT SetDatatype(SQLDMO_LPCSTR NewValue);

[!REMARQUE]

SQL Distributed Management Objects (SQL-DMO) strings are always returned as OLE BSTR objects. A C/C++ application obtains a reference to the string. The application must release the reference using SysFreeString.

Notes

The Datatype property may not completely define the data type of a column. Columns requiring width specification, such as varchar, or specification of scale and precision, such as decimal, are defined using the Datatype property in concert with Length, NumericPrecision, and NumericScale properties.

Use the AlterDataType method to change the data type of an existing column.

Applies To:

Column Object