# Exec into postgresql pod
$ kubectl exec -it -n postgres pod/postgres-deployment-698bd56b7-fnbpv -- /bin/bash

# Login to dev_user and connect to test_db which is already created
$ psql -h <hostname> -U postgres -d postgres

# check tables
$ \dt

# Create table
$ create table test1 (id SERIAL PRIMARY KEY, name VARCHAR(50));

# Insert values into table
$ insert into test1 values('1','user1');

# Check inserted values
$ select * from test1;