title: nested select with delete sql statement
body: <p>I dunno how do I need to solve it:</p>
  
  <p>i've got a select statement:</p>
  
  <pre><code>SELECT 
         sum_lines.id, 
         sum_lines.line_id, 
         sum_lines.summary_id, 
         sum_lines.text_content, 
         sum_tbl.user_id 
  FROM 
         sum_lines 
  JOIN 
         sum_tbl 
  ON 
         sum_lines.summary_id = sum_tbl.id 
  WHERE 
         sum_tbl.user_id = 1 
  </code></pre>
  
  <p>how can I delete everything that this statement is showing with a delete statement?</p>