In SQL Server MDF and NDF databases, there are many system tables used to store structure and other meta data of the databases.
Below is a list of the common-used system tables:
| System Table Name |
|---|
| sys.allocation_units |
| sys.objects |
| sys.assembly_modules |
| sys.parameters |
| sys.check_constraints |
| sys.partitions |
| sys.columns |
| sys.procedures |
| sys.computed_columns |
| sys.sequences |
| sys.default_constraints |
| sys.service_queues |
| sys.events |
| sys.sql_dependencies |
| sys.event_notifications |
| sys.sql_expression_dependencies |
| sys.extended_procedures |
| sys.sql_modules |
| sys.foreign_key_columns |
| sys.stats |
| sys.foreign_keys |
| sys.stats_columns |
| sys.function_order_columns |
| sys.synonyms |
| sys.hash_indexes |
| sys.table_types |
| sys.identity_columns |
| sys.tables |
| sys.index_columns |
| sys.trigger_event_types |
| sys.indexes |
| sys.trigger_events |
| sys.key_constraints |
| sys.triggers |
| sys.numbered_procedure_parameters |
| sys.views |
| sys.numbered_procedures |