Get  all user tables with size

declare @idint
declare @typecharacter(2) 
declare@pagesint
declare @dbname sysname
declare @dbsize dec(15,0)
declare @bytesperpagedec(15,0)
declare @pagesperMBdec(15,0)

create table #spt_space
(
objidint null,
rowsint null,
reserveddec(15) null,
datadec(15) null,
indexpdec(15) null,
unuseddec(15) null
)

set nocount on

-- Create a cursor to loop through the user tables
declare c_tables cursor for
selectid
fromsysobjects
wherextype = '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 TableName = (select left(name,60) from sysobjects where id = objid),
Rows = convert(char(11), rows),
ReservedKB = ltrim(str(reserved * d.low / 1024.,15,0) + ' ' + 'KB'),
DataKB = ltrim(str(data * d.low / 1024.,15,0) + ' ' + 'KB'),
IndexSizeKB = ltrim(str(indexp * d.low / 1024.,15,0) + ' ' + 'KB'),
UnusedKB = ltrim(str(unused * d.low / 1024.,15,0) + ' ' + 'KB')

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