Auto Created Relationship when referencing an SQL database?

[Heroof323]

I have a few questions on this image and they may not be worded correctly so bear with me. I am accessing my SQL database for the first time and after a few days noticed this new icon. My first question is what is this icon referencing. I think it is pulling in the auto relationship feature of Power BI to automatically create relationships it believes can be beneficial for this data set, which is great. When I tried another data set to see if there was a similar auto relationship generation it was non-existent. What's the difference between the two circled icons in this Navigation window. I'd really like to transform the data where my columns are datasets and I can pick and choose which to include, for performance reasons. I feel like this is a pipe dream. Any help would be appreciated.

[lbendlin]

These icons have nothing to do with the relationships.  The top icons indicate views, the bottom ones tables - on your SQL server. From a Power BI perspective it doesn't really matter, as they are treated the same in data source terms.