Hello sir, My name is reshab, i am a python/django backend developer with over 3 years of experience in developing apps, scripts, etc.
For your project, i will create a python script that will be used as a cron job in crontab and run periodically, this script will query your database A and then add the data to B according to your constraints (like there can me more fields and should put null if no value) (also its not clear whether B is a database or text file) and create a csv file as output in a specified directory.
I am always open for discussion, plz leave me a message and we can go on from there.
Thank You
Regards,
Reshab