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Rule Property

后续版本的 Microsoft SQL Server 将删除该功能。 请避免在新的开发工作中使用该功能，并着手修改当前还在使用该功能的应用程序。

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.

语法

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);
注意注意

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.

注释

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