SQL knowledge summary 004: Postgres terminal command summary

I am using postgresql Container created postgresql database , Therefore, the following commands are based on this ！

1. Enter into container ：

docker exec -it  Containers id  /bin/bash

2. Command line login database , Enter the database created by default ：

The format is ：

psql -U username -h ipaddress -d dbname

My is ：

psql -U postgres -d postgres

3. List all databases ：

postgres=# \l

4. Switch database ：

postgres=# \c tododb

among ,tododb Is my other database name

5. List the tables under the current database

Because my database only has postgres There's data in , therefore , First use \c Switch back , Reuse \d View all tables in the database ：

postgres=# \d

6. Show current database

postgres=# select current_database()

7. List all the fields of the table

postgres=# \d tablename

8. Check the basic information of the table

postgres=# \d+ tablename

9. Change database password ：

alter user postgres with password '654321';

Note that the password is ’ ‘ Enclosed content ! Don't lose the last ; Number , Otherwise nothing can be done .

It's also easy to change the password expiration time :

alter user postgres with valid until '2017-01-01 08:00:00';

If you want to change it to never expire ：

alter user postgres with valid until 'infinity';

10. Log out

postgres=# \q