PostgreSQL connect to database using psql

PostgreSQL

To connect to PostgreSQL database server using psql command line, run

If you have a PostgreSQL user and password, you can use

Example

-W option is to force asking password. See PostgreSQL […]

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postgresql.service: The name org.freedesktop.PolicyKit1 was not provided by any .service files

When i restart postgresql, i get following error

This is because you are running the command as user postres. Login as user “root”, you will be able to restart postgres with command

See PostgreSQL […]

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Run PostgreSQL in Docker

To run PostgreSQL on docker, create a directory for saving the data presistant

run docker container

In above, change the value for POSTGRES_DB, POSTGRES_USER and POSTGRES_PASSWORD as needed. Connect to PostgreSQL server To connect to PostgreSQL server, run

Now you are inside PostgreSQL conainer, to login, run

It will ask for […]

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PostgreSQL List all databases

PostgreSQL

To list all databases in PostgreSQL database, first connect to PostgreSQL database using psql command

Now run

This will list all available databases. To change to a database, use command /connect

Once you connected to a database, you can list all tables in a database with command

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PostgreSQL Create Database

To create a database, run

Creating user, grant permissions

Creating a User and Database using psql

[…]

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Backup PostgreSQL Database

To backup PostgreSQL database, run

Example

PostgreSQL […]

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Create user in PostgreSQL

Method 1 To create user, become user “postgres” with

now run

Method 2 You can run following commands in psql prompt

https://www.postgresql.org/docs/8.0/static/sql-createuser.html PostgreSQL […]

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