title: How to select Date,ID ,Qty at the maximum month of Date of each ID
body: <p>I have..</p>
  
  <pre><code>Date         ID   Qty
  2019/4/1     A    11  
  2019/5/1     A    22  
  2019/6/1     A    33 'need (Maximum Month of A)
  2019/6/2     A    44 'need (Maximum Month of A)
  2019/7/1     B    55 'need (Maximum Month of B)
  2019/7/2     B    66 'need (Maximum Month of B)
  2019/6/1     B    77
  2019/5/1     B    88  
  </code></pre>
  
  <p>I need all rows at maximum month of Date for each ID as below</p>
  
  <pre><code>Date         ID   Qty  
  2019/6/1     A    33
  2019/6/2     A    44
  2019/7/1     B    55
  2019/7/2     B    66
  </code></pre>