一天一点T-SQL：根据文件组统计存储使用率

-- 根据文件组统计存储使用率
-- 避免直接使用微软集成报告只能按每数据文件显示存储使用率的麻烦
SELECT
CASE
WHEN FILEGROUP_NAME(T.GROUPID) IS NULL THEN 'DATABASE_LOG'
ELSE FILEGROUP_NAME(T.GROUPID)
END AS [FILEGROUP_NAME],
SUM(T.SIZE) * 8.0 / 1024 / 1024 AS [TOTIL_GB],
SUM(FILEPROPERTY(T.NAME,'SPACEUSED')) * 8.0 /1024 / 1024 AS [USED_GB],
(SUM(T.SIZE) - SUM(FILEPROPERTY(T.NAME,'SPACEUSED'))) * 8.0 / 1024 / 1024 AS [UNUSED_GB],
CAST(SUM(FILEPROPERTY(T.NAME,'SPACEUSED')) AS FLOAT) / CAST(SUM(T.SIZE) AS FLOAT) * 100 AS [USED_PERCENT]
FROM
SYS.SYSFILES T
GROUP BY T.GROUPID