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When schema changes are made in SQL Server Management Studio, Management Studio attempts to drop and re-create the table and since you cannot drop a published objects, the schema change will fail.
First published on MSDN on Apr 19, 2018 SQL Server replication uses the publisher, distributor, and subscriber paradigm to provide logical data replication capability between different SQL Server instances, and sometime with heterogeneous data source or data destination.
Transactional replication tracks changes by marking the transaction log, but this marking process is not affected by the recovery model.
Merge replication adds the column rowguid to every table, unless the table already has a column of data type uniqueidentifier with the ROWGUIDCOL property set (in which case this column is used).
Activity can continue on a database while a publication is being created.
Be aware that producing a snapshot can be resource-intensive, so it is best to generate snapshots during periods of lower activity on the database (by default a snapshot is generated when you complete the New Publication Wizard).
Snapshot replication does not require a primary key. There are no restrictions on the number or types of publications that can use the same distribution database.If the table is dropped from the publication, the msrepl_tran_version column is not removed.Transactional replication requires a primary key constraint on each published table.If the table is dropped from the publication, the rowguid column is removed; if an existing column was used for tracking, the column is not removed.If a transactional publication supports queued updating subscriptions, replication adds the column msrepl_tran_version to every table.