title: I installed postrgres.app but `psql` command does not work
body: <p>I installed PostgreSQL with Postgress.app and need to import some databases from the command line.</p>
  <p><a href="https://i.stack.imgur.com/SgGCg.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/SgGCg.png" alt="My command line and Postgress.app opened" /></a></p>
  <p>This is a screenshot of my command line. In theory, when I type <code>psql -U postgres -d Employees &lt; employees.sql</code> the database should be created. But, instead, I receive this message: <code>zsh: command not found: psql</code> . I don't know what this message means or what I should do about it. How can I make the <code>psql</code> command work? Please somebody explain, I know this must be very basic but I don't understand anything.</p>
  <p>And this is what the instructor of the course says should happen:</p>
  <p><a href="https://i.stack.imgur.com/e8oaX.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/e8oaX.png" alt="enter image description here" /></a></p>
  <p>Further information:</p>
  <ul>
  <li>I am following the ZeroToMastery course on databases. This is the lesson where I had this error: <a href="https://academy.zerotomastery.io/courses/1073491/lectures/23180605" rel="nofollow noreferrer">https://academy.zerotomastery.io/courses/1073491/lectures/23180605</a></li>
  <li>I have not used the command line or SQL before.</li>
  </ul>