分区情况
--分区情况
SELECT c.* , b.[groupname] AS '分区方案对应的文件组名称' , d.name '当前分区函数对应的分区方案' FROM sys.destination_data_spaces AS a INNER JOIN sysfilegroups AS b ON a.[data_space_id] = b.[groupid] INNER JOIN ( SELECT $PARTITION.Fun_TinyBlog_Id(id) AS 分区编号 , MIN(id) AS Min_value , MAX(id) AS Max_value , COUNT(id) AS 记录数 FROM [dbo].[TinyBlog] GROUP BY $PARTITION.Fun_TinyBlog_Id(id) ) AS c ON c.[分区编号] = a.[destination_id] INNER JOIN sys.partition_schemes AS d ON a.[partition_scheme_id] = d.data_space_id ORDER BY c.[分区编号] |
第二个视图直接把NULL值忽略了
根据第一个视图，我们画出一个总结图
分析一下
总结
结论其实很清晰，分区列不要允许NULL，如果允许列，那么我们交换分区归档数据的时候就会有麻烦了，因为无法判断分区列是NULL值的那些数据行是老数据还是新数据
