快速解决方案可以是:

SELECT your_db_column_name from "your_db_schema_name"."your_db_tabel_name";

要更改数据库吗?

\l - to display databases
\c - connect to new database

更新。

我又看了一遍你的问题。 显示模式

\dn - list of schemas

要改变模式，您可以尝试

SET search_path TO

如果在docker exec中使用PSQL，它是这样的:

docker exec -e "PGOPTIONS=--search_path=<your_schema>" -it docker_pg psql -U user db_name

在PostgreSQL中，系统通过遵循搜索路径来确定哪个表，该路径是要查找的模式列表。

搜索路径中的第一个匹配表将被视为需要的表，否则，如果没有匹配则引发错误，即使匹配表名称存在于数据库中的其他模式中。

要显示当前搜索路径，您可以使用以下命令:

SHOW search_path;

要把新的模式放到路径中，你可以使用:

SET search_path TO myschema;

或者如果你想要多个模式:

SET search_path TO myschema, public;

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

PostgreSQL 14 Debian

    postgres@ovhswift:~$ psql
psql (14.0 (Debian 14.0-1.pgdg100+1))
Type "help" for help.

postgres=# create database test;
CREATE DATABASE
postgres=# \c test
You are now connected to database "test" as user "postgres".
test=# create schema tests;
CREATE SCHEMA
test=# \dt
Did not find any relations.
test=# create table pubtable (id integer);
CREATE TABLE
test=# create table tests.schematable (id integer);
CREATE TABLE
test=# \dt
          List of relations
 Schema |   Name   | Type  |  Owner
--------+----------+-------+----------
 public | pubtable | table | postgres
(1 row)

test=# \dt tests.
Did not find any relation named "tests.".
test=# \dt tests
Did not find any relation named "tests".
test=# \dt 'tests.'
Did not find any relation named "tests.".
test=# \dt 'tests.*'
            List of relations
 Schema |    Name     | Type  |  Owner
--------+-------------+-------+----------
 tests  | schematable | table | postgres
(1 row)

test=# \dt 'tests*'
Did not find any relation named "tests*".
test=# \dt 'tests.*'
            List of relations
 Schema |    Name     | Type  |  Owner
--------+-------------+-------+----------
 tests  | schematable | table | postgres
(1 row)

对于\dv等，同样可以查看模式中的视图

快速解决方案可以是:

SELECT your_db_column_name from "your_db_schema_name"."your_db_tabel_name";