How to compare data between two databases in PostgreSQL?
There are several tools out there:
(note that most of these tools can only compare structure, but not data)
Free Ones:
- pgquarrel: http://eulerto.github.io/pgquarrel (schema diff)
- apgdiff http://apgdiff.com/ (schema diff)
- Liquibase (Cross DBMS): http://www.liquibase.org (schema diff)
- pgAdmin https://www.pgadmin.org (schema diff in pgAdmin4)
- WbDataDiff (Cross DBMS): http://www.sql-workbench.net/manual/compare-commands.html#command-data-diff (data diff)
- WbSchemaDiff (Cross DBMS): http://www.sql-workbench.net/manual/compare-commands.html
- Migra https://migra.djrobstep.com/ (schema diff)
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/ (14 day trial, compares schema and data)
Try using pg_dump
on both databases and diffing the files.
Another free app (that can only compare structure, but not data):
DBeaver - you can select databases, tables, etc to compare with each other
I have evaluated a lot of the tools and found following solution:
Schema comparison:
The most interesting were Liquibase, Persyas and PgCodeKeeper:
(issue) Liquebase converts:
SET DEFAULT nextval('myschema.name_id_seq'::regclass)
into
BIGSERIAL
So it was rejected to use
(issue) Persyas worked fine untill I added some additional schema and it starts throwing following:
pyrseas_1 | TypeError: 'NoneType' object is not iterable
So I have found PgCodeKeeper it works perfectly and it is alive (you can check releases). I use following command:
./pgcodekeeper-cli.sh -E -I ./ignore.txt \
-s "jdbc:postgresql://localhost/postgres?user=postgres&password=123" \
-t "jdbc:postgresql://localhost/postgres?user=postgres&password=123" \
-o /result/schema-diff-$(date +'%m%d%y_%H%M%S').sql
Data comparison: I have tried to use Liquebase and it just does not work you can see the steps I tried in my unanswered question about data difference of two databases with Liquebase
So I have found another project SQL Workbench/J It works really nice and generate reall diff in sql. I use following command:
java -jar /sqlworkbench.jar -command="'WbDataDiff -excludeTables=$EXCLUDE_TABLES \
-referenceConnection=$REFERENCE_CONNECTION \
-targetConnection=$TARGET_CONNECTION -referenceSchema=$1 \
-targetSchema=$1 -file=$DIFF_RESULT_FILE -singleFile=true \
-includeDelete=true -ignoreMissingTarget=true ;'"
Both tools support objects filtration. It is really convenient.
Migrations
And finally I use Liquebase just for migration/version tracking.