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 ColumnsNullByDefault property controls column default value behavior when a table is created in the Microsoft SQL Server database.
語法
object
.ColumnsNullByDefault [=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 GetColumnsNullByDefault(LPBOOL pRetVal);
HRESULT SetColumnsNullByDefault(BOOL NewValue);
備註
If TRUE, columns in new tables allow NULL.
If FALSE, columns in new tables do not allow NULL.
The default behavior can be changed on a column-by-column basis. For more information, see AllowNulls Property.