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Rule Property

未來的 Microsoft SQL Server 版本將移除這項功能。請避免在新的開發工作中使用這項功能，並規劃修改目前使用這項功能的應用程式。

The Ruleproperty identifies a data integrity constraint, implemented by a Microsoft SQL Server database rule and bound to the referenced column or user-defined data type.

語法

object
.Rule [= value]

Parts

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

  • value
    A string that identifies a SQL Server rule by name

Data Type

String

Modifiable

Read/write for the Column object. Read-only for the UserDefinedDatatype object.

Prototype (C/C++)

HRESULT GetRule(SQLDMO_LPBSTR pRetVal);
HRESULT SetRule(SQLDMO_LPCSTR NewValue);

[!附註]

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.

備註

Setting the Rule property offers an alternate method for binding SQL Server rules to columns.