title: SQL query to retrieve financial year data grouped by the year
body: <p>I have a database with lets assume two columns (service_date &amp; invoice_amount). I would like to create an SQL query that would retrieve and group the data for each financial year (July to June).</p>
  
  <p>I have two years of data so that is two financial years (i.e. 2 results).</p>
  
  <p>I know I can do this manually by creating an SQL query to group by month then run the data through PHP to create the financial year data but I'd rather have an SQL query.</p>
  
  <p>All ideas welcome.</p>
  
  <p>Thanks</p>