title: Getting extra rows - After joing the 3 tables using Left Join
body: <pre><code>SELECT (b.descr || ' - ' || c.descr) description
    FROM tbl1 a LEFT JOIN tbl2 b ON a.ACCOUNT = b.ACCOUNT 
         LEFT JOIN tbl3 c ON a.product = c.product
   WHERE a.descr50 = ' ' ;  
  </code></pre>
  
  <p>table1 has only 7622 rows with descr50 = ' ' but this select is returning 7649 rows. Could you please help me in this? thanks in advance</p>