查詢BD大小

SQL 如下：

SELECT RTRIM(name) AS [Segment Name], groupid AS [Group Id], filename AS [File Name],
   CAST(size/128.0 AS DECIMAL(10,2)) AS [Allocated Size in MB],
   CAST(FILEPROPERTY(name, 'SpaceUsed')/128.0 AS DECIMAL(10,2)) AS [Space Used in MB],
   CAST([maxsize]/128.0 AS DECIMAL(10,2)) AS [Max in MB],
   CAST([maxsize]/128.0-(FILEPROPERTY(name, 'SpaceUsed')/128.0) AS DECIMAL(10,2)) AS [Available Space in MB],
   CAST((CAST(FILEPROPERTY(name, 'SpaceUsed')/128.0 AS DECIMAL(10,2))/CAST([maxsize]/128.0 AS DECIMAL(10,2)))*100 AS DECIMAL(10,2)) AS [Percent Used]
FROM sysfiles