title: Populating a database column from a larger one in excel
body: <p>I am trying to add data from secondary Excel database to a column in a master database based on the value of another column in the master database.</p>
  
  <p>I have two Excel files, a primary database, and a secondary database. In the primary, I have 3 columns (A,B,C) and the second I have 2 columns (B,D). My request is how to add the values of D column in the primary database knowing that the data in D column must match the associated value in B column?</p>
  
  <p>Note: The secondary database is much larger than the primary</p>