title: How can I get records that have a duplicate combination of columns in SQL?
body: <p>How can I get just the records that have a duplicate combination of columns? For example in the table below I want to get the records that have a duplicate combination of ParentID and Date.</p>
  
  <pre><code>+----+----------+-------------------------+
  | ID | ParentID |          Date           |
  +----+----------+-------------------------+
  |  1 |      225 | 2018-05-10 00:00:00.000 |
  |  2 |      225 | 2018-05-10 00:00:00.000 |
  |  3 |      300 | 2019-25-11 00:00:00.000 |
  +----+----------+-------------------------+ 
  </code></pre>