title: Adding label to SAS variables
body: <p>I have a dataset in SAS called <strong>"Flight"</strong> and i want to label all the rows of one particular column <strong>"Carrier"</strong> with values which matches 
    <strong>("Flght_carrier_code")</strong> from another dataset 
  called <strong>"Airlines"</strong>.</p>
  
  <p><strong>Please suggest some method.</strong></p>
  
  <p><strong>Sample Data set 1 - "Flight"</strong></p>
  
  <pre><code>date      carrier   flight  tailnum air_time
  01-01-2013  UA      1714    N24211  227
  01-01-2013  AA      1141    N619AA  160
  01-01-2013  B6       725    N804JB  183
  01-01-2013  DL      461     N668DN  116
  01-01-2013  UA      1696    N39463  150
  01-01-2013  B6      507     N516JB  158
  01-01-2013  EV      5708    N829AS  53
  01-01-2013  B6      79      N593JB  140
  01-01-2013  AA      301     N3ALAA  138
  01-01-2013  B6      49      N793JB  149
  01-01-2013  B6      71      N657JB  158
  </code></pre>
  
  <p><strong>Sample Data set 2 - "Airlines"</strong></p>
  
  <pre><code>Flght_carrier_Code  name
  9E              Endeavor Air Inc.
  AA              American Airlines Inc.
  AS              Alaska Airlines Inc.
  B6              JetBlue Airways
  DL              Delta Air Lines Inc.
  EV              ExpressJet Airlines Inc.
  F9              Frontier Airlines Inc.
  FL              AirTran Airways Corporation
  HA              Hawaiian Airlines Inc.
  MQ              Envoy Air
  OO              SkyWest Airlines Inc.
  UA              United Air Lines Inc.
  US              US Airways Inc.
  VX              Virgin America
  WN              Southwest Airlines Co.
  YV              Mesa Airlines Inc.
  </code></pre>