title: How to combine 2 dataframes
body: <p>I have 2 dataframes as below. Dataframe 1 has timestamp from june 2017 to Sept 2017. And Dataframe 2 has timestamp from Jan 15th to Jan 18th 2018. </p>
  
  <p><strong>I need to combine both of these dataframes</strong>, without losing any data. </p>
  
  <p>The column names are same in both the dataset.</p>
  
  <p><strong>Dataframe 1 : 382 observation; 38 variables; Timestamp : 1-15-2018 to 1-18-2018</strong></p>
  
  <p><strong>Dataframe 2 : 9567 observation ; 34 variables ; Timestamp : 6-6-2017 to 9-13-2017</strong></p>
  
  <p><em>Dataframe 1 :</em></p>
  
  <pre><code>  TimeStamp         A        B         C    D        E        F     G   H
    1/15/2018 0:00    49.9238  62.2187   0    52.3125  63.457   49    84  54
    1/15/2018 0:15    49.8437  62.4817   0    52.3125  58.593   49    84  54
    1/15/2018 0:30    50.2187  62.3932   0    52.625   75.995   49    84  54
  </code></pre>
  
  <p><em>Dataframe 2 :</em></p>
  
  <pre><code>TimeStamp       D   A       B       E       C       F
  6/6/2017 0:00   54  71.94   71.94   44.684  79.06   40.996
  6/6/2017 0:15   53  71.94   71.63   45.966  80.06   40.708
  6/6/2017 0:30   54  73.44   72.06   46.088  77.81   40.845
  6/6/2017 0:45   54  73.88   72.06   46.704  83.56   40.654
  6/6/2017 1:00   52  72.81   71.75   47.144  78.19   40.685
  </code></pre>