SQL Server Code to Find Total Size of Database

Total database size script

SELECT

[SpaceUsed(KB)] = SUM(alloc.used_pages)*8

FROM sys.objects obj

JOIN sys.indexes idx on obj.object_id = idx.object_id

JOIN sys.partitions prt on obj.object_id = prt.object_id

JOIN sys.allocation_units alloc on alloc.container_id = prt.partition_id

WHERE

obj.type = 'U' AND idx.index_id IN (0, 1)