How to select a schema in postgres when using psql?

In PostgreSQL the system determines which table is meant by following a search path, which is a list of schemas to look in.

The first matching table in the search path is taken to be the one wanted, otherwise, if there is no match a error is raised, even if matching table names exist in other schemas in the database.

To show the current search path you can use the following command:

SHOW search_path;

And to put the new schema in the path, you could use:

SET search_path TO myschema;

Or if you want multiple schemas:

SET search_path TO myschema, public;

Reference: https://www.postgresql.org/docs/current/static/ddl-schemas.html

\l - Display database
\c - Connect to database
\dn - List schemas
\dt - List tables inside public schemas
\dt schema1. - List tables inside particular schemas. For eg: 'schema1'.