SQL Server查看所有表大小，所占空间

create table #Data(name varchar(100),row varchar(100),reserved varchar(100),data varchar(100),index_size varchar(100),unused varchar(100)) 

declare @name varchar(100)
declare cur cursor  for
    select name from sysobjects where xtype='u' order by name
open cur
fetch next from cur into @name
while @@fetch_status=0
begin
    insert into #data
    exec sp_spaceused   @name
    print @name 

    fetch next from cur into @name
end
close cur
deallocate cur 

create table #DataNew(name varchar(100),row int,reserved int,data int,index_size int,unused int) 

insert into #dataNew
select name,convert(int,row) as row,convert(int,replace(reserved,'KB','')) as reserved,convert(int,replace(data,'KB','')) as data,
convert(int,replace(index_size,'KB','')) as index_size,convert(int,replace(unused,'KB','')) as unused from #data  

select * from #dataNew order by data desc    

--主要原理： 
exec sp_spaceused '表名' --取得表占用空間 
exec sp_spaceused ''--數據庫所有空間

还有一个简单的办法

SELECT   a.name, b.rows
FROM      sysobjects AS a INNER JOIN
                 sysindexes AS b ON a.id = b.id
WHERE   (a.type = 'u') AND (b.indid IN (0, 1))
ORDER BY b.rows DESC

引用：http://www.cnblogs.com/nikyxxx/archive/2012/10/08/2715423.html