How to get information in one database when row is inserted in another database?

Question

I have two databases. How can I write some trigger to get notification in database1 when row is insered in some table in database2. I have link from database1 to database2, but I don't have link from two to one.

Answer 1

A standard way to replicate data between databases like this is to create a materialized view in database1 for your table(s) in database2. Eg

CREATE MATERIALIZED VIEW db1_table
REFRESH FORCE AS
SELECT * FROM db2_table@db2;

See for example this article for details .