So the first thing we will often want to do with a blank canvas is add some data to it. So let's start in our data bar. In the sources section, we can see any database connections that have been made available to us in this canvas such as this BigQuery one and also any metric catalogs which have been defined using our semantic layer like this one. So if I were to click on one of these sources and then come to the panel below, this is where I can learn more about the schema. So by clicking, I can find out what tables are in here and which columns are available. So one way that we can easily get some data onto our canvas from here is using this add to canvas button. We can see here that it has added a SQL cell. So SQL cells are fundamental to analysis and count. It's how we add data from our database to our canvas and also how we build up our analysis.