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--drop table #spt_space
go
IF  OBJECT_ID('tempdb..#tmp','U') IS NOT NULL
drop table #tmp
go
IF  OBJECT_ID('tempdb..#spt_space','U') IS NOT NULL
drop table #spt_space
go
declare @id int         
declare @type   character(2)        
declare @pages  int         
declare @dbname sysname
declare @dbsize dec(15,0)
declare @bytesperpage   dec(15,0)
declare @pagesperMB     dec(15,0)

create table #spt_space
(
    objid       int null,
    rows        int null,
    reserved    dec(15) null,
    data        dec(15) null,
    indexp      dec(15) null,
    unused      dec(15) null
)

set nocount on

-- Create a cursor to loop through the user tables
declare c_tables cursor for
select  id
from    sysobjects
where   xtype = 'U'

open c_tables

fetch next from c_tables
into @id

while @@fetch_status = 0
begin

    /* Code from sp_spaceused */
    insert into #spt_space (objid, reserved)
        select objid = @id, sum(reserved)
            from sysindexes
                where indid in (0, 1, 255)
                    and id = @id

    select @pages = sum(dpages)
            from sysindexes
                where indid < 2
                    and id = @id
    select @pages = @pages + isnull(sum(used), 0)
        from sysindexes
            where indid = 255
                and id = @id
    update #spt_space
        set data = @pages
    where objid = @id


    /* index: sum(used) where indid in (0, 1, 255) - data */
    update #spt_space
        set indexp = (select sum(used)
                from sysindexes
                where indid in (0, 1, 255)
                and id = @id)
                - data
        where objid = @id

    /* unused: sum(reserved) - sum(used) where indid in (0, 1, 255) */
    update #spt_space
        set unused = reserved
                - (select sum(used)
                    from sysindexes
                        where indid in (0, 1, 255)
                        and id = @id)
        where objid = @id

    update #spt_space
        set rows = i.rows
            from sysindexes i
                where i.indid < 2
                and i.id = @id
                and objid = @id

    fetch next from c_tables
    into @id
end

select --top 25
    Table_Name = (select [name] from sysobjects where id = objid),
    rows = convert(char(11), rows),
    reserved_KB = (reserved * d.low / 1024.) ,
    data_KB = (data * d.low / 1024.) ,
    index_size_KB = (indexp * d.low / 1024.) ,
    unused_KB = (unused * d.low / 1024.) 
into #tmp       
from    #spt_space, master.dbo.spt_values d
where   d.number = 1
and d.type = 'E'
order by reserved desc

drop table #spt_space
close c_tables
deallocate c_tables



select * from #tmp

Managment Studio也提供現成的報表可以使用，如下圖所示。在物件管理員點選要查詢的資料庫，點選滑鼠右鍵開啟功能選單，選擇［報表］->[標準報表]->[排名最前面資料表的磁碟使用量]即可。