title: Creating a custom column
body: <p>I'm trying to create a custom column which is the multiplication of 2 existing columns. </p>
  
  <pre><code>(
    select
      omdDeliveryQty * omlUnitPriceBase AS 'Value'
  ) *
  from
    SalesOrderDeliveries
    Left Outer Join SALESORDERLINES On OMDSALESORDERID = OMLSALESORDERID
    And OMDSALESORDERLINEID = OMLSALESORDERLINEID
  </code></pre>