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1. #UNINSTALL POSTGRES APP 9.6 MAC INSTALL#
2. #UNINSTALL POSTGRES APP 9.6 MAC SOFTWARE#
3. #UNINSTALL POSTGRES APP 9.6 MAC MAC#

#UNINSTALL POSTGRES APP 9.6 MAC INSTALL#

If you don't have it installed follow the instructions on the homebrew's homepage to install it.įirst, we ensure that Homebrew is up to date $ brew update The site also has instructions for using the Postgres.app command line tools.Īlternatively you can use Homebrew to install PostgreSQL. There are instructions for installing Postgres.app on the its homepage.

#UNINSTALL POSTGRES APP 9.6 MAC MAC#

One option for installing PostgreSQL on a Mac is to use Postgres.app. If you need help setting up Cloud9, see our instructions in the LS95 Prep Course. Psql: FATAL: database "ec2-user" does not existĬloud9 is an especially good option if your main OS is Windows, or if you're fairly new to programming or configuring and installing development tools. When you run the psql command, Postgres automatically tries to connect to a database of the same name as the user running the command: $ psql It's usually a good idea to also create a database of the same name as the user role. With the new user role created, you should now be able to run Postgres commands from the terminal without the need to prepend them with sudo -u postgres.

Don't worry about this, the user should still be created. When running that command you may see a message along these lines could not change directory to "/home/ec2-user/environment": Permission denied. Note: when you run this command bash will automatically replace $LOGNAME with whatever the name is for the local user, which will usually be ec2-user. To create a new database, type: $ sudo -u postgres createdb my_databaseĬreating a Postgres role for the local userĪnother option is to create a Postgres role for the local user (passing the -s flag to createuser creates the user as a superuser): $ sudo -u postgres createuser -s $LOGNAME For instance, to run the psql command, type: $ sudo -u postgres psql

In order to run Postgres as the default postgres user, you need to prepend whichever command you are running with sudo -u postgres. This is because you are trying to run Postgres as the local user, and there is no user role set up within Postgres for that user. Psql: FATAL: role "ec2-user" does not exist If you try to run the psql console simply by using the psql command, you'll receive an error which looks something like this: $ psql If you are using AWS Cloud9 with Amazon Linux 2, the following commands should work instead to install PostgreSQL 9.2: $ sudo yum install postgresql postgresql-server If your environment uses Amazon Linux AMI, the following procedure should work to install PostgreSQL 9.6: $ sudo yum install postgresql96 postgresql96-server Cloud9īy far the simplest solution would be to use a cloud-based development environment such as AWS Cloud9. Unfortunately, we can't help you customize a previously installed version of PostgreSQL. You may already have PostgreSQL installed, in which case you may be able to skip some parts of the installation procedures described below.

Please follow the directions below to install it. A query is a way to search, or lookup data within a database, as opposed to updating or changing data.īefore you can start using PostgreSQL, you first need to install it for your Operating System. The language used by RDBMSs.Ī SQL command used to access/use the database or the data within that database via the SQL language.Ī subset of a "SQL Statement".

#UNINSTALL POSTGRES APP 9.6 MAC SOFTWARE#

A software application for managing relational databases, such as PostgreSQL.Ī set of individual but related data entries analogous to a database table. TermĪ structured collection of data that follows the relational model. We've mentioned some of these terms already in this book, but it's worth recapping them here while introducing a few other terms that you should familiarize yourself with. Throughout this book, we'll be using certain vocabulary related to RDBMSs and SQL.