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This is the most expected asked SQL Server interview questions during the interview by the interviewer.

Publisher is the one who owns the database and is the main source for data. Publisher identifies what data should be distributed across.

Distributor is a bridge between publisher and subscriber. Distributor gathers all the published data and holds it until it sends it across to all subscriber. So as it is a bridge who sits in between publisher and subscriber, it supports multiple publisher and subscriber concept

Subscriber is the end source or the final destination to which data has to be transmitted.

sql

Figure: - Publisher, Distributor and Subscriber in action

View video on Query Plan, Logical/Physical operators in SQL Server as follows: -



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