I am learning about HA DBs https://www.interviewbit.com/problems/highly-available-database/ According to the above, here is how writes/reads happen in this system Write request: A client can contact any node in the ring with a put() request to write data, this node acts as a coordinating node fo...

I would like to know if it is possible to insert a 'null' string in a column which has a NOT NULL constraint. I'm using PostgreSQL, although this probably applies to other database management systems as well. The query would look like the below INSERT INTO originators(originator, id, regexp) VALU...