migration 1.9.6 to 2.4.4 : migrate unique table for testing rules

[thomas34]

Hi , 
I m a beginner in magento 2.
I m trying to migration our database from M1 to M2 
I have to transform some datas. One module is different and i have to modifye the data before to save it . 
but the migration take without this transformation around 2h.
How to try modification without migrated everything?
Is it possible to migrate a uniq table?
Should i exlude all table on map.xml? Is there any easier way?

Thanks a lot 
Thomas

[shimajadid870d]

Migrations are like version control for your database, allowing your team to define and share the application's database schema definition. If you have ever had to tell a teammate to manually add a column to their local database schema after pulling in your changes from source control, you've faced the problem that database migrations solve.

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