SELECT OBJECT_NAME(i.object_id) AS TableName,data_pages*8 AS DataSize --这里返回的是数据页个数，1页是8K，所以乘以8
FROM sys.indexes as i
JOIN sys.partitions as p ON p.object_id = i.object_id and p.index_id = i.index_id
JOIN sys.allocation_units as a ON a.container_id = p.partition_id
where i.object_id=OBJECT_ID('tablename')
FROM sys.indexes as i
JOIN sys.partitions as p ON p.object_id = i.object_id and p.index_id = i.index_id
JOIN sys.allocation_units as a ON a.container_id = p.partition_id
where i.object_id=OBJECT_ID('tablename')
