Learn SQL

A guide to learning SQL via data about the United States' national parks.

Setup

If you don't want to install sqlite3 locally, or you have trouble you can run SELECT queries in your browser:

https://sqlime.org/#https://github.com/ajmarcus/nationalparks/main/data/nps.sqlite

Just note that the CREATE and INSERT queries covered below will not work in the browser.

If you want to install sqlite3, first check if you have it already:

• Open a terminal
• Type "sqlite3" and press enter

sqlite3 ./nps.sqlite

• If you see a prompt like "sqlite>", then you have sqlite3 installed

SQLite version 3.43.2 2023-10-10 13:08:14
Enter ".help" for usage hints.
sqlite>

If you don't already have it, this is how to install sqlite3:

• Go to https://www.sqlite.org/download.html
• Choose the "Precompiled Binaries For" Mac OS X or Windows section
• Download the sqlite-tools-*.zip file
• Unzip and you should have a sqlite3 executable
• On Mac you will need to right click on the sqlite3 file and choose "Open" to bypass the security warning
• On Windows, I'm not sure what you need to do
• On Mac, you can then move sqlite3 to /usr/local/bin to make it available from the command line

mv ~/Downloads/sqlite-tools-osx-x64-3450100/sqlite3 /usr/local/bin

• Now you should be able to run sqlite3 from the command line

sqlite3 ./nps.sqlite

SQLite version 3.43.2 2023-10-10 13:08:14
Enter ".help" for usage hints.
sqlite>

Use these settings in your sqlite3 shell locally to get pretty output:

sqlite> .header on
sqlite> .mode table