ColumnsNullByDefault 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 ColumnsNullByDefault property controls column default value behavior when a table is created in the Microsoft SQL Server database.
语法
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);
备注
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.