title: How can I select multiple columns while setting one of them as DISTINCT
body: <p>I have 6 columns and I want to select data from them while fixing one column as distinct</p>
  
  <pre><code>Column1 |Column2         |Column3       |Column4     |Column5     |Column6
  --------|----------------|--------------|------------|------------|-------
   A      |267             |2364          |001         |345.000000  |22
   B      |267             |2364          |001         |700.000000  |22
   C      |267             |2364          |001         |345.000000  |22
   D      |267             |2364          |001         |1200.000000 |22
   E      |267             |2364          |001         |1350.000000 |22
   F      |267             |2364          |001         |345.000000  |22
   A      |267             |2364          |002         |270.000000  |22
   B      |267             |2364          |002         |2300.000000 |22
   C      |267             |2364          |002         |270.000000  |22
  </code></pre>
  
  <p>the Display should be the following:</p>
  
  <pre><code>Column1 |Column2         |Column3       |Column4     |Column5       |Column6
  --------|----------------|--------------|------------|--------------|-------
  A       |267.000000     |2364.000000      |001        |345.000000   |22
  B       |267.000000     |2364.000000      |001        |700.000000   |22
  C       |267.000000     |2364.000000      |001        |345.000000   |22
  D       |267.000000     |2364.000000      |001        |1200.000000  |22
  E       |267.000000     |2364.000000      |001        |1350.000000  |22
  F       |267.000000     |2364.000000      |001        |345.000000   |22
  </code></pre>