Replication Tables (Transact-SQL)
A replication topology is supported by replication system tables. When a user database is configured as a Publisher or a Subscriber, replication adds system tables to the database. These tables are removed when a user database is removed from a replication topology. For general rules regarding using system tables, see System Tables (Transact-SQL).
The following is a list of the system tables used by replication, grouped by database.
Replication Tables in the master Database
Replication Tables in the msdb Database
Replication Tables in the Distribution Database
These tables in the distribution database are used for replicating data from non-SQL Server Publisher. For more information, see Non-SQL Server Publishers.