title: to find even odd and plain series in postgresql
body: <p>this might be naive but I want to know is there any way possible to find rows which have even entries and which have odd.
  I have data in this format</p>
  
  <pre><code>"41,43,45,49,35,39,47,37"
  "12,14,18,16,20,24,22,10"
  "1,2,3,4,5,6"
  "1,7,521,65,32"
  </code></pre>
  
  <p>what I have tried is to split these values with an Id column and then reading them with Even and Odd functions but it is too time taking.
  is there a query or a function through I can find out that which of the rows are even, odd sequence and arbitrary?</p>
  
  <p>thanks in advance.</p>