AnsiNulls Property
この機能は、将来のバージョンの Microsoft SQL Server では削除される予定です。新規の開発作業ではこの機能を使用しないようにし、現在この機能を使用しているアプリケーションは修正することを検討してください。
The AnsiNulls property reports the NULL acceptance behavior for new columns.
構文
object
.AnsiNulls [=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 GetAnsiNulls(LPBOOL pRetVal);
HRESULT SetAnsiNulls(BOOL NewValue);
解説
By default, Microsoft SQL Server creates columns that do not accept NULL when the user does not explicitly declare the ability to accept NULL. Further, SQL Server returns TRUE when evaluating the expression NULL = NULL. These default behaviors are nonstandard.
If AnsiNulls is TRUE, new columns accept NULL by default and any comparison of NULL to any other value, including NULL, returns NULL.
The AnsiNulls property affects the way in which NULLs are handled for the user's connection only and overrides any database-specific settings for column creation and NULL comparison.