[FEATURE]: multi df

[hardiktalati]

Is there an existing issue for this?

• I have searched the existing issues

Problem statement

join multiple dataframes and aggregation - custom sql

Proposed Solution

custom sql should be allowed with join and aggregation with some flag options

Additional Context

No response

[mwojtyczka]

I think this is what you are looking for: #74
The row level checks are using sql column expressions.
Currently the framework handles one dataframe at a time.

Discussion on the same topic: #340