title: How to subtract values of two different columns from two different tables?
body: <p>Example Table Structure </p>
  
  <p><strong>Table 1</strong> </p>
  
  <pre><code>ID      |    Name    |  Price
  -----------------------------
  1       |   Casio    |  30
  2       |   Titan    |  40
  </code></pre>
  
  <p><strong>Table 2</strong></p>
  
  <pre><code>ID      |    Place   |  Price
  -----------------------------
  1       |   Cali    |  30 
  
  2       |   Mexi    |  10
  </code></pre>
  
  <p>Operation to perform:
   <strong>Table1(Price) - Table2(Price) for ID = 1</strong></p>
  
  <p><strong>New Table 1</strong></p>
  
  <pre><code>ID      |    Name    |  Price
  -----------------------------
  1       |   Casio    |  0
  2       |   Titan    |  40
  </code></pre>
  
  <p>ID matches in both tables </p>