Largest tables on an instance

DROP TABLE ##tableSizes;
CREATE TABLE ##tableSizes
(
TableName VARCHAR(1000),
EstimatedRowCount BIGINT,
TotalSpaceGB DECIMAL(10,2)
);

EXEC sp_MSforeachdb 'USE [?];

INSERT INTO ##tableSizes
SELECT ''['' + DB_NAME() + ''].['' + s.Name + ''].['' + t.NAME + '']'' AS TableName,
p.rows AS EstimatedRowCounts,
CAST(ROUND(((SUM(a.total_pages) * 8) / 1024.00), 2) / 1024 AS NUMERIC(36, 2)) AS TotalSpaceGB
FROM sys.tables t
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
LEFT OUTER JOIN sys.schemas s ON t.schema_id = s.schema_id
WHERE
t.NAME NOT LIKE ''dt%''
AND t.is_ms_shipped = 0
AND i.OBJECT_ID > 255
GROUP BY
t.Name, s.Name, p.Rows
ORDER BY
t.Name
';

SELECT @@SERVERNAME, * FROM ##tableSizes
WHERE TotalSpaceGB > 10
ORDER BY TotalSpaceGB DESC