💾 Installing MySQL on MacOS (and using it with R)
A couple of days ago I was asked to install MySQL on MacOS 10.13, and I was surprised that it was not a one-click installation, as in case of R. Unfortunately, even for me a documentation was a bit confusing, and I think it might be useful to have a guide of the installation process.
1. Download .dmg file and install MySQL
At the end of the installation, when one has reached a summary, a separate windows will pop up with a temporary password (as in a screenshot below). This password should be kept somewhere.
2. Set aliases
In order to avoid changing directories all the time before evoking
mysql we can set aliases for
mysqladmin commands. To do so one has to open Terminal and execute the following commands (assuming that MySQL was installed to a default folder):
alias mysql=/usr/local/mysql/bin/mysql alias mysqladmin=/usr/local/mysql/bin/mysqladmin
3. Start MySQL sever
Everything should go smooth so far. Now we need to start our sever. One can do it in Terminal:
cd /Library/LaunchDaemons sudo launchctl load -F com.oracle.oss.mysql.mysqld.plist
or in System Preferences…
… by clicking on “Start”.
4. Change the temporary password
Now we need to run MySQL to change a temporary password for a ‘root’ user. After calling the following command, Terminal will ask for a password which we saved when installing MySQL in the first step:
mysql -u root -p
If everything is done correctly, you should see something like this:
Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 24 Server version: 5.7.21 Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql>
To change the password we simply call this command, where “MyNewPass” as you already guessed is a new password:
SET PASSWORD FOR 'root'@'localhost' = PASSWORD('MyNewPass');
And then quit MySQL:
5. (Optional) Install Sequel Pro IDE for MySQL
I find Sequel Pro a quite useful and beautiful IDE for MySQL. To install it one has to download a .dmg file, open it, and drag & drop “Sequel Pro.app” to applications’ folder.
To connect to a local MySQL one has choose Socket in menu and fill in a username (default “root”) and the password that we changes in the previous step.
6. Use MySQL in conjuntion with R
RMySQL provides a full interface for connecting R to MySQL. There are dozens of tutorials on how to use this package, and one can easily google them. We just want to ensure that everything works smoothly. First off, MySQL Server should be launched (as in Step 3). Then, we install and load the package, and finally, using user/password pair connect to a certain database.
install.packages("RMySQL") library(RMySQL) install.packages("RMySQL") library(RMySQL) con <- dbConnect(MySQL(), user = "root", password = "MyNewPass", dbname = "test", host = "localhost") dbListTables(con) #  "CalendarMonths" dbDisconnect(con) #  TRUE