title: Is there any way to export pandas dataframe into database with existing tables?
body: <p>Dear Stackoverflow Community, i'm trying to export my dataframe into postgresql database, i used SQLAlchemy but it doesnt give me the opportunity to map the dataframe with the existing tables in the database, for exemple this mt dataframe:</p>
  <pre><code>ClientNumber ClientName Amout
          1000     Albert   5000     
          2000       John   4000
          1200   Cristian   1000
  </code></pre>
  <p>and the database have this table :</p>
  <pre><code>id_client  client_name   client_amount
       1000       Albert            5000     
       2000         John            4000
       1200     Cristian            1000
  </code></pre>
  <p>The question is how to link my dataframe to postgresql without forcing to change the name columns of the dataframe ?
  Thanks in advance</p>