Installing Postgres via Brew

Pre-Reqs

Brew Package Manager

In your command-line run the following commands:

1. brew doctor
2. brew update

Installing

1. In your command-line run the command: brew install postgresql@15

2. Run the command: brew services start postgresql@15

3. Run the command: createdb `whoami`

4. Connect to your postgres with the command: psql

5. createuser -s postgres - fixes role "postgres" does not exist

6. Test with psql command

   $ psql
   psql (14.5 (Homebrew))
   Type "help" for help.
   
   ibraheem=# exit
   

Details

What is this ln command I ran in my Terminal?

from the man ln command

The ln utility creates a new directory entry (linked file) which has the same modes as the original file. It is useful for maintaining multiple copies of a file in many places at once without using up storage for the copies''; instead, a link points'' to the original copy. There are two types of links; hard links and symbolic links. How a link ``points'' to a file is one of the differences between a hard and symbolic link.

What is launchctl?

from the man launchctl command

launchctl interfaces with launchd to manage and inspect daemons, angents and XPC services.

Commands

Create database

createdb <database_name>

createdb mydjangoproject_development

List databases

psql -U postgres -l

Show tables in database

psql -U postgres -d <database_name>

psql -U postgres -d mydjangoproject_development

Drop database

dropdb <database_name>

dropdb mydjangoproject_development

Restart database

dropdb <database_name> && createdb <database_name>

dropdb mydjangoproject_development && createdb mydjangoproject_development