This query comes from two other answers:
Get size of all tables in database
How to find largest objects in a SQL Server database?
, but I enhanced this to be universal. It uses sys.objects dictionary:
SELECT
s.NAME as SCHEMA_NAME,
t.NAME AS OBJ_NAME,
t.type_desc as OBJ_TYPE,
i.name as indexName,
sum(p.rows) as RowCounts,
sum(a.total_pages) as TotalPages,
sum(a.used_pages) as UsedPages,
sum(a.data_pages) as DataPages,
(sum(a.total_pages) * 8) / 1024 as TotalSpaceMB,
(sum(a.used_pages) * 8) / 1024 as UsedSpaceMB,
(sum(a.data_pages) * 8) / 1024 as DataSpaceMB
FROM
sys.objects t
INNER JOIN
sys.schemas s ON t.SCHEMA_ID = s.SCHEMA_ID
INNER JOIN
sys.indexes i ON t.OBJECT_ID = i.object_id
INNER JOIN
sys.partitions p ON i.object_id = p.OBJECT_ID AND i.index_id = p.index_id
INNER JOIN
sys.allocation_units a ON p.partition_id = a.container_id
WHERE
t.NAME NOT LIKE 'dt%' AND
i.OBJECT_ID > 255 AND
i.index_id <= 1
GROUP BY
s.NAME, t.NAME, t.type_desc, i.object_id, i.index_id, i.name
ORDER BY
sum(a.total_pages) DESC
;