title: Understanding connections in SQL Developer
body: <p>I have tried looking at a few resources but still remain a bit confused. Hopefully someone can explain to me exactly what is going on.</p>
  <p>I installed oracle 19c. I then set up several connections. My main question is: what is a connection? Is a connection a database? What is being connected to. Other resources state that 19c is itself a database, but what if I want a second one?</p>
  <p>I got some help from this link but still have more questions.
  <a href="https://stackoverflow.com/questions/18680321/creating-a-new-database-and-new-connection-in-oracle-sql-developer">Creating a new database and new connection in Oracle SQL Developer</a></p>
  <p><a href="https://i.stack.imgur.com/Pr4dK.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Pr4dK.png" alt="enter image description here" /></a></p>