etl - minus query in sql developer -

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i have 2 database connections in sql developer active lets db1 , db2. working on etl validation. want check if data table1 of db1 populated correctly in table2 of db2.

to access tables 2 connections how can write query? on helpful

there common ways validate if etl correct:

  1. you can run 2 queries calculate line counts separately against table1@db1 , table2@db2, , compare line counts between them.
  2. or perform aggregate functions, such sum(), avg()...etc on tables in db1/db2.

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