List 10 largest tables in SQL Server

Query below list ten largest tables in database.


select top 10 schema_name(tab.schema_id) + '.' + as [table], 
    cast(sum(spc.used_pages * 8)/1024.00 as numeric(36, 2)) as used_mb,
    cast(sum(spc.total_pages * 8)/1024.00 as numeric(36, 2)) as allocated_mb
from sys.tables tab
join sys.indexes ind 
     on tab.object_id = ind.object_id
join sys.partitions part 
     on ind.object_id = part.object_id and ind.index_id = part.index_id
join sys.allocation_units spc
     on part.partition_id = spc.container_id
group by schema_name(tab.schema_id) + '.' +
order by sum(spc.used_pages) desc;


  • table - table name with schema name
  • used_mb - size of space actually in use by table in MB
  • allocated_mb - size of allocated or reserved space by this table in MB


  • One row represents one table
  • Scope of rows: ten tables which uses most space
  • Ordered by actually used space

Sample results

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