SQL中如何查询各个数据表的大小<轉>

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 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

原文地址:http://hi.baidu.com/sjzkingdee/blog/item/f569bc77767f9b11b151b938.html