title: What's the difference between a tuple and a row in Postgres?
body: <p>My general understanding is that a tuple is a row. However, I'm using the Postgres dev plan in Heroku. It has a limit of <strong>10,000</strong> rows. I have over <strong>100,000</strong> entries for <code>n_live_tup</code>. How can this be?</p>