title: How to merge two django models (tables) into one model (table)
body: <p>I want to merge two django models and create single model. Let's suppose
  I have first table Table A with some column and data.</p>
  
  <pre><code>Table A
  --------------
  col1   col2    col3    col4
  x1     x2      x3      x4
  y1     y2      y3      y4
  </code></pre>
  
  <p>and I have another table Table B with some column and data</p>
  
  <pre><code>Table B
  --------------
  col1   col2    col5    col6
  x1     x2      p3      p4
  y1     y2      p5      p6
  </code></pre>
  
  <p>in both the models (tables) I have few columns (here two column) similar and few columns are different. So I want to merge both the models (tables) and generate something like below:</p>
  
  <pre><code>Table C
  -------------------------------------
  col1    col2    col3    col4    col5    col6
  x1      x2      x3      x4      p3      p4
  y1      y2      y3      y4      p5      p6
  </code></pre>
  
  <p>I know when I will merge models and run make migration, django will surely create a migration and after migrating I would be able to create the above structure but I do not want to loose my data as it will be go on prod db.
  It can be done easily with sql query on database but how to do with django????
  Thanks in advance for any response.</p>