Disk Space Usage

>>Script Language and Platform: SQL Server
Find how much disk space is used on a database in a week. (Between disk space usage differences)

Author: Surekha K

SELECT distinct top 10 (SELECT SD.IPAddress FROM ServersDetails SD WHERE SD.ServerID=dl.ServerID)IPAddress,dl.ServerID,dl.DriveName,
((SELECT top 1 dl1.FreeSpaceInMB FROM DiskSpaceData dl1 
    WHERE CAST(dl1.UpdatedDate AS DATE) = (select CAST(MAX(ds.UpdatedDate)-7 as date) 
		from DiskSpaceData ds where ds.ServerID= dl.ServerID and ds.DriveName=dl.DriveName) AND dl1.DriveName=dl.DriveName 
    and dl1.ServerID = dl.ServerID)
    -(SELECT top 1 dl1.FreeSpaceInMB FROM DiskSpaceData dl1 
    WHERE CAST(dl1.UpdatedDate AS DATE) = (select CAST(MAX(ds.UpdatedDate) as date) 
		from DiskSpaceData ds where ds.ServerID= dl.ServerID and ds.DriveName=dl.DriveName) AND dl1.DriveName=dl.DriveName 
    and dl1.ServerID = dl.ServerID)
    )DiskSpaceUsedMBInSevenDays,

 cast(round(dl.FreeSpaceInMB/1024,2) as numeric(18,2)) FreeSpaceInGB
FROM    DiskSpaceData dl
WHERE CAST(dl.UpdatedDate AS DATE)=(select CAST(MAX(ds.UpdatedDate) as date) 
	from DiskSpaceData ds 
	where ds.ServerID= dl.ServerID and ds.DriveName=dl.DriveName) 
	AND EXISTS(SELECT DBL.DatabaseID 
	FROM DatabasesList DBL 
	WHERE DBL.ServerID=dl.ServerID 
	AND (dl.DriveName=DBL.DataDrive 
	OR dl.DriveName = DBL.LogDrive) 
	AND CAST(DBL.UpdatedDate AS DATE)=(select CAST(MAX(dlt.UpdatedDate) 
	AS DATE) from DatabasesList dlt where dlt.ServerID=dbl.ServerID and (dlt.DataDrive=dbl.DataDrive or dlt.LogDrive=dbl.LogDrive)))

order by DiskSpaceUsedMBInSevenDays desc

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