How to connect to a Postgresql server from a terminal in Linux

https://phoenixnap.com/kb/how-to-connect-postgresql-database-command-line

How to Practise SQL on Amazon AWS for Free Improve your SQL skills by practising on a real database

 How to Practise SQL on Amazon AWS for Free Improve your SQL skills by practising on a real database

https://towardsdatascience.com/how-to-practice-sql-on-aws-for-free-dde1bc461e10

Database is Read-Only

Problem: After attaching a database to MS SQL Server, the database is displayed as 'Read-Only'.

Description: I created a folder on volume E:\, and put the database I downloaded from SysAid in the folder. After I attached the database to MS SQL Server, the database was displayed as 'Read-Only'.

Solution: Grant 'Everyone' 'Full Control' access to the folder, then attach it.

How to open an .mdf file? (How to attach a database to MS SQL Server?)

http://www.youtube.com/watch?v=rhIr9Qf-oHw