title: how to fetch and add data in sqlite
body: <p>how to fetch and add the data in sqlite? I want to  for example. I have table1 that has 2 columns</p>
  
  <pre><code>column 1           column 2
     1                   2
  </code></pre>
  
  <p>I want to fetch column2 so that i will be able to add it to the newly inputed number. </p>
  
  <p>for example</p>
  
  <p>newly inputted number is 5 then</p>
  
  <pre><code>column 1           column 2
     1                   7
  </code></pre>