Sha flawgical

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

-E: will describe the underlaying queries of the \ commands (cool for learning!)
-l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

Sans jQuery

Events

// jQuery
$(document).ready(function() {
  // code
})

SQL to MongoDB Mapping Chart

SQL to MongoDB Mapping Chart¶

In addition to the charts that follow, you might want to consider the Frequently Asked Questions section for a selection of common questions about MongoDB.

Executables¶

The following table presents the MySQL/Oracle executables and the corresponding MongoDB executables.

	const PROB = 0.2
	const grabIngredient = ingredient => () => {
	return new Promise((resolve, reject) => {
	setTimeout(() => {
	if (Math.random() > PROB) {
	resolve(ingredient)
	} else {
	reject(`Sorry, we've got no ${ingredient}`)
	}
	}, Math.random() * 1000)