Frederico Pereira Campos de Moura Martins FredericoMM

• repo -> repository

• clone -> bring a repo down from the internet (remote repository like Github) to your local machine

• add -> track your files and changes with Git

• commit -> save your changes into Git

• push -> push your changes to your remote repo on Github (or another website)

• pull -> pull changes down from the remote repo to your local machine

• status -> check to see which files are being tracked or need to be commited

• init -> use this command inside of your project to turn it into a Git repository and start using Git with that codebase

#Intro

Kotlin is a new programming language for the JVM. It produces Java bytecode, supports Android and generates JavaScript. The latest version of the language is Kotlin M5.3

Kotlin project website is at kotlin.jetbrains.org.

All the codes here can be copied and run on Kotlin online editor.

Let's get started.

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Self Joins

• Cross Join example
• Inner Join example

joins can be inefficent - they can require moving lots of data around and increase the data process from n to n * n