仅在插入或更新的行上使SQL Server使用检查约束。

I would like to apply a business rule to the rows in a table going forward (SQL Server 2008). However, there is historical data in the table that will not conform to this rule, and there is no good way to make it conform (unknown values with no reasonable defaults.) So I would like the CHECK CONSTRAINT to I would like to apply a business rule to the ro