title: SQL day syntax doesn't work on AWS Athena
body: <p>Complete SQL novice. I am trying to execute the following TPC-H query on AWS Athena:</p>
  <pre><code>select
          l_returnflag,
          l_linestatus,
          sum(l_quantity) as sum_qty,
          sum(l_extendedprice) as sum_base_price,
          sum(l_extendedprice * (1 - l_discount)) as sum_disc_price,
          sum(l_extendedprice * (1 - l_discount) * (1 + l_tax)) as sum_charge,
          avg(l_quantity) as avg_qty,
          avg(l_extendedprice) as avg_price,
          avg(l_discount) as avg_disc,
          count(*) as count_order
  from
          lineitem
  where
          l_shipdate &lt;= date '1998-12-01' - interval ':1' day (3)
  group by
          l_returnflag,
          l_linestatus
  order by
          l_returnflag,
          l_linestatus;
  </code></pre>
  <p>Unfortunately Athena doesn't understand this synatx:
  l_shipdate &lt;= date '1998-12-01' - interval ':1' day (3)
  Me neither. What is this trying to do?</p>