Let me clarify what I mean by master and slave (since googling this issue takes me to psql master slave replication which is probably different).
I work with the slave db to create invoices with my python cli app.
I have created a master db by using
create database master with template slave owner owner_name;
For now, both db contain the same data and structure.
Now, I will delete all data from tables like sale_invoice, sale_invoice_detail etc but not from tables like customer, product etc.
I may create new entries in tables like customer, product etc or modify existing ones. I will create new invoices which shall insert new records in sale_invoice and sale_invoice_details table.
I want to be able to:
1. Add new entries created in customer, product tables to the master db
2. Modify old entries if they are modified in the slave db
3. Add new data to sale_invoice and sale_invoice_detail tables in the master db when new invoices are created in the slave db
I assume, I can do all this by matching primary keys and using insert/update but I want to know if there are better ways to do this.
Thanks.