Datatype Property
Questa funzionalità verrà rimossa in una delle prossime versioni di Microsoft SQL Server. Evitare di utilizzare questa funzionalità in un nuovo progetto di sviluppo e prevedere interventi di modifica nelle applicazioni in cui è attualmente implementata.
The Datatype property exposes the data type name for the referenced column.
Sintassi
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);
[!NOTA] 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.
Osservazioni
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:
Vedere anche
Riferimento
AlterDataType Method
Length Property
NumericPrecision Property
NumericScale Property