# diffChangeLog with Firebird databases

**URL:** <https://forum.liquibase.org/t/diffchangelog-with-firebird-databases/3582>\
**Category:** General Discussion\
**Created:** [December 28, 2017, 8:52pm UTC](https://forum.liquibase.org/t/diffchangelog-with-firebird-databases/3582 "2017-12-28T20:52:00Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![VictorZanella](https://avatars.discourse-cdn.com/v4/letter/v/839c29/32.png) [@VictorZanella](https://forum.liquibase.org/u/VictorZanella)\
**Post date:** [December 28, 2017, 8:52pm UTC](https://forum.liquibase.org/t/diffchangelog-with-firebird-databases/3582/1 "2017-12-28T20:52:00Z")

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I was making some tests with diffChangeLog command, and it seems to be strange.

If i compare the same database in Firebird, it brings me a lot of changes, like this:

  

Why it is happen and why diff brings differences between the same database ?

  

PS.: It don’t happen with postgresql database