title: PGSQL Error Code 42703 column does not exist
body: <p>I have a database in postgreSQL. I want to read some data from there, but I get an error (<code>column anganridref does not exist</code>) when I execute my command.</p>
  
  <p>Here is my NpgsqlCommand:</p>
  
  <pre><code>cmd.CommandText = "select * from angebot,angebotstatus,anrede where anrid=anganridref and anstaid=anganstaidref";
  </code></pre>
  
  <p>and my 3 tables  </p>
  
  <p><img src="https://i.stack.imgur.com/HWeec.png" alt="http://img4.fotos-hochladen.net/uploads/unbenanntg4059ucm6j.png"></p>
  
  <p>the names of my columns are rights. So I don't understand why that error comes. Someone can explain me why it does crash? Its not the problem of large and lowercase.</p>