Microsoft® SQL Server™ supports join filters in merge replication. Join filters allow you to extend the filtering of rows in one table to the filtering of rows in related tables. When you filter a table horizontally for publication, you set criteria that include certain rows and exclude other rows. If you include in your publication other tables that contain data related to the data in the base table, you may not want the publication to include all of the data in the related tables. Join filters allow you to include only those rows in the related table that you define as being relevant for the publication.