How to check difference between two databases in P

Question

Is it possible to compare two databases with identical structure? Let say that I have two databases DB1 and DB2 and I want to check if there is a difference in data between them.

Answer 1

Another free app:

DBeaver - you can select databases, tables, etc to compare with each other

Answer 2

I recommend DB Best Database Compare Suite - trial version is only for 2 days, but it allows you to compare scheme and data.

Read more on official product website.

Answer 3

Try using pg_dump on both databases and diffing the files.

Answer 4

I'm working on a comprehensive comparison tool for Postgres. It will be free while in beta.

Postgres Compare

Initially this is just schema (DDL) comparison but we will probably expand to data also. I believe this is a tool that a lot of shops require in order to move from their current RDBMS without having to also change how their development environments, operations etc work too.

Answer 5

There are several tools out there:

Free Ones:

• pgquarrel: http://eulerto.github.io/pgquarrel
  
• apgdiff: http://apgdiff.com/
  
• Liquibase (Cross DBMS): http://www.liquibase.org
  
• WbSchemaDiff (Cross DBMS): http://www.sql-workbench.net/manual/compare-commands.html
• Migra: https://migra.djrobstep.com/

Commercial:

• DB Comparer: http://www.sqlmanager.net/en/products/postgresql/dbcomparer
• Aqua Data Studio: http://docs.aquafold.com/docs-diff-schema.html
• DB Solo: http://www.dbsolo.com/index.html (30 day trial)
• PostgresCompare: https://www.postgrescompare.com/

Answer 6

The best tool which I ever seen https://pythonhosted.org/Pyrseas/

1. Get dump from database A dbtoyaml ...

2. Generate migration from A => B yamltodb ... [file generated in step 1]