caused "Error establishing a database connection"

This plugin broke my website and caused by causing the following error: “Error establishing a database connection.”

I installed Google Analyticator and activated it yesterday. This morning when I went to my website, it was down and I received this error message. When I searched for this error on my host’s troubleshooting section, and it said it’s often caused by 3rd party software. The only thing I had changed recently was adding this plugin. I deleted the plugin from my cPanel, and the error stopped and functionality was restored to my website.