CompareNull Property
未來的 Microsoft SQL Server 發行版本將不再提供此功能。請避免在新的開發工作中使用此功能,並計劃修改目前使用此功能的應用程式。
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.