CompareNull 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 CompareNull property controls evaluation of NULL for equality.

語法

object.CompareNull [=value]

Parts

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

• value
  TRUE or FALSE

Data Type

Boolean

Modifiable

Read/write

Prototype (C/C++)

HRESULT GetCompareNull(LPBOOL pRetVal);
HRESULT SetCompareNull(BOOL NewValue);

備註

If TRUE, the expression NULL = NULL evaluates as NULL.

If FALSE, the expression NULL = NULL evaluates as TRUE.

Any value for CompareNull is overridden by the AnsiNulls property, which controls NULL evaluation for a client session.

Applies To:

DBOption Object