Postgres Db Client For Mac
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I. Introduction

The other day I began a new Node.js project and wanted to use PostgreSQL as my database backend. If you’re here reading this tutorial, hopefully, you are trying to do the same!

This tutorial will teach you how to set up, configure, and use PostgreSQL on MacOSX 10.7 (Lion) and above. You will need at least a basic level of comfort using the command line using either the MacOSX built-in terminal, iTerm2, Zsh, or something similar. By the time we are finished, you will:

Have a running PostgreSQL 9.5.4 instance
Know how to create and manage databases and users
Know how to use both command-line and UI tools to manage your database

Postgres Db Client For Mac

II. About PostgreSQL

PostgreSQL is an ACID-compliant Object Relational Database Management System, or ORDBMS (quite a mouthful!). Put simply, it is a database that allows you to relate one piece of data to another (thus, “relational”). It runs on nearly any operating system including Linux, Unix, and Windows. It is high performance and highly scalable, capable of handling huge amounts of data and high-load internet applications with thousands of concurrent users. Its unique combination of simplicity and power makes it a popular choice for individual users and small businesses, but enterprise businesses like Yahoo, Uber, Disqus, and TripAdvisor as well.

Postgres supports a long list of database features, including several enterprise features. Aside from standard relational database features, some of the most notable features in Postgres are:

Streaming replication
Schemas
User-defined objects like operators, data types, and functions
Nested transactions
Table inheritance
Partitioning
Several unusual data types, like Money, Geometry, IP addresses, JSON, and data ranges.
Can execute stored procedures in over a dozen programming languages, including Java, Perl, Python, Ruby, and C/C++.

Due to its first-class support for JSON, Postgres is often a good alternative to “No-SQL” databases like MongoDB. Read more about PostgreSQL

III. Getting Started

The first thing we’re going to do is install Postgres. There are two main ways to get Postgres onto your machine:

Using a graphical installer like BigSQL or Postgres.app
Using a package manager to install via the command line.

You can pick whichever option is right for you. For this tutorial, let’s see how to install on the command line.

1. Getting Homebrew

To install PostgreSQL on the command line we will be using a package manager called Homebrew. If you already have Homebrew installed, you can skip to Installing PostgreSQL. Otherwise, let’s keep going.

Let’s start by copying and pasting the following command into our command line:

Don’t worry about what all that does—as long as you’re using MacOSX 10.7 or higher, the Ruby interpreter comes pre-installed. The rest of this command (the curl command) is a tool to make web requests from your command line. This one downloads the script at the given URL, and then the Ruby interpreter executes it. You should see output similar to the following:

Installing Homebrew

Now that we have Homebrew, we can proceed to install Postgres!

2. Installing Postgres

Now that we have Homebrew, installing PostgreSQL is very easy. Run the following command to install PostgreSQL using Homebrew:

You should then see the following output:

*Installing *

Homebrew takes care of resolving Postgres’ dependencies, which in this case are OpenSSL and Readline. It also takes care of knowing which are the latest versions, where to get them, and how to unpack them. Most importantly are the easy-to-miss instructions at the very end of the install:

Starting Services

Let’s go ahead and start Postgres running, and make sure Postgres starts every time your computer starts up. Execute the following command:

Finally, let’s make sure Postgres is installed and running. Let’s check what version is running:

Your output should look like the following:

Postgres Installed

That’s it! You have Postgres installed. Now we’re finally ready to learn how to use it!

3. Configuring Postgres

Postgres works pretty hard to make itself usable right out of the box without you having to do anything. By default, it automatically creates the user postgres. Let’s see what other users it has created. Let’s start by using the psql utility, which is a utility installed with Postgres that lets you carry out administrative functions without needing to know their actual SQL commands.

Start by entering the following on the command line:

(You may need to use sudo psql postgres for this command to work, depending on how your system is configured).

You’ll see output like the following:

psql output

That’s the psql command line. We can now enter a command to see what users are installed:

Under the covers, this command executes an SQL query (we’ll learn about those later) that gets all the users in the database. On my machine, it returns the following:

psql User List

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We see the Postgres user I mentioned, but what is that other user, engineerapart? This is one of the things Postgres does to make your life easier when you first install it. On most Linux-based operating systems, the username that is used by default by all processes is the one you are logged in as. You don’t have to pass your username to most programs. But if a particular program, like Postgres, doesn’t have your username configured—it will fail!

So when Postgres is installed, it automatically creates a database user that matches your username, so that you can get started right away.

A. Creating Users

Postgres doesn’t actually directly manage users or groups, like most standard permission models do. Instead, it directly manages what it calls roles.

While it is certainly convenient that Postgres sets up a set of default users for you, it is a very bad idea to use them for anything except local development, because they are ver

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Postgres Database Client For Mac