SystemDatatype Object

Questa caratteristica verrà rimossa a partire da 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 SystemDatatype object exposes the attributes of a Microsoft SQL Server base data type.

Properties

AllowIdentity Property	IsVariableLength Property
AllowLength Property	MaximumChar Property
AllowNulls Property	MaximumLength Property
IsNumeric Property	Name Property

Osservazioni

SQL Server defines base data types, such as varchar or smallint. The types constrain data in SQL Server columns to certain fundamental properties, such as numeric precision or value representation. SQL Server base data types have an established precedence for mixed-data type arithmetic performed on an instance of SQL Server.

A SystemDatatype object exists for each base data type defined by SQL Server.

The Name property of a SystemDatatypecannot be set by the user.

[!NOTA]

The SystemDatatype object is compatible with instances of SQL Server versions 7.0 and later. However, the SystemDatatype2 object extends the functionality of the SystemDatatype object for use with features that were introduced in SQL Server 2000.

Vedere anche

Riferimento

SystemDataType2 Object