How to Install and Create Roles PostgreSQL on Ubuntu | Easiest Way to Install PostgreSQL on Ubuntu
How To Install PostgreSQL on Ubuntu
1. Open the command prompt on your system.
2. Run the following command to install PostgreSQL:
sudo apt install postgresql
3. After installation, access the PostgreSQL interactive terminal by typing:
psql
4. Once in the PostgreSQL interactive terminal, switch to the PostgreSQL administrative user:
sudo -u postgres psql
5. In the PostgreSQL administrative terminal, execute the following SQL command to check if the role 'sensei' already exists:
SELECT rolname FROM pg_roles WHERE rolname = 'sensei';
6. If the 'sensei' role does not exist, create it by executing the following SQL command:
CREATE ROLE sensei WITH LOGIN PASSWORD 'abcd';
7. After creating the role, create a database named 'sensei':
CREATE DATABASE sensei;
8. Grant the 'sensei' role select permissions on all tables in the public schema:
GRANT SELECT ON ALL TABLES IN SCHEMA public TO sensei;
9. Exit the PostgreSQL administrative terminal by typing:
\q
10. Return to the regular PostgreSQL interactive terminal by typing:
psql
11. You have successfully completed the installation and setup process for PostgreSQL. You can now start using PostgreSQL with the configured 'sensei' role and 'sensei' database.
If you encounter any errors or have any questions, feel free to ask for further assistance!
These steps cover the installation, configuration, and basic usage of MySQL, including creating a database and a sample table within it. Ensure to adjust configurations and commands as needed based on your specific requirements and system setup.
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