参考sql2012存储过程写的统计所有用户表尺寸大小的示例

可以结合sp_msforeachdb再遍历所有用户数据库查看所有表的尺寸大小，注意它的参数@sql不能超过nvarchar(2000)，这里就不贴出代码了。
另外还可以定期运行并将结果保存下来，以便观察数据变化趋势。

查询单个数据库的所有用户表尺寸大小：

select @@servername as servername,db_name() as dbname ,object_id as objectid, schema_name(schema_id) as schname, name as tablename
    ,rowcnt as rows,columns,indexes,rowlength
    ,reservedkb, tableusedkb
    ,usedkb-tableusedkb as indexusedkb,reservedkb-usedkb as unusedkb
    ,create_date as createdate,modify_date as lastmodifieddate, getutcdate() as trackingutctime
from
(select
    object_id
    ,schema_id
    ,name
    ,(select max(row_count) from sys.dm_db_partition_stats p with(nolock) where p.object_id=t.object_id and p.index_id < 2)  as rowcnt
    ,(select count(1) from dbo.syscolumns with(nolock) where id = t.object_id) as columns
    ,(select count(distinct index_id) from sys.dm_db_partition_stats p with(nolock) where p.object_id=t.object_id) as indexes
    ,(select sum(length) from dbo.syscolumns with(nolock) where id = t.object_id) as rowlength
    ,isnull((select sum(reserved_page_count) from sys.dm_db_partition_stats p with(nolock) where p.object_id=t.object_id),0)*8
        + isnull((select sum(reserved_page_count)
                from sys.dm_db_partition_stats p2 with(nolock)
                inner join sys.internal_tables it with(nolock) on p2.object_id = it.object_id
                where it.parent_id = t.object_id
                        and it.internal_type in (202,204,207,211,212,213,214,215,216,221,222,236)),0)* 8 as reservedkb
    ,isnull((select sum(in_row_data_page_count + lob_used_page_count + row_overflow_used_page_count)
                 from sys.dm_db_partition_stats p with(nolock) where p.object_id=t.object_id and p.index_id < 2),0)* 8 as tableusedkb
    ,isnull((select sum(used_page_count) from sys.dm_db_partition_stats p with(nolock) where p.object_id=t.object_id),0)*8
        + isnull((select sum(used_page_count)
                from sys.dm_db_partition_stats p2 with(nolock)
                inner join sys.internal_tables it with(nolock) on p2.object_id = it.object_id
                where it.parent_id = t.object_id
                        and it.internal_type in (202,204,207,211,212,213,214,215,216,221,222,236)),0)* 8 as usedkb
    ,create_date
    ,modify_date
from sys.tables t with(nolock)
where type='u'
) a
order by reservedkb desc