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SQL to eliminate duplicates while inserting rows from source table to destination table

insert into DestinationTable
select *  from SourceTable a
 where not exists ( select 0 from DestinationTable b where b.primaryKey= a.primaryKey )

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Kafka Consumer Parallelism

Kafka Parallel Consumer Options: Key-level parallelism:  Multiple threads process the messages from a single partition in parallel while ma...