title: Unknown column 'xy' in 'where clause'
body: <p>I'm using this query</p>
  
  <pre><code>var query = $"SELECT id, username, password, salt FROM users WHERE username={username}";
  </code></pre>
  
  <p>Assuming <code>username</code> is set <code>toxic</code>, the error thrown is the following:</p>
  
  <pre><code>Unknown column 'toxic' in 'where clause'
  </code></pre>
  
  <p>I already tried to add single quotes ('), threw another error (having an error near 'toxic' in syntax). However, I wonder what is wrong with that query? I elaborated and found evidence that this comes from the very query itself.</p>