title: vlookup to find match and return another element in row
body: <p>i have two sheets. first column of both sheets has userids, but there is only some overlap of ids between the two sheets. i want to keep the userids in the first sheet, but in the second sheet, the second column has a point of data that i want. for those userids in the first sheet that are also in the second sheet, i want to get this data.</p>
  
  <p>so, for say the first row's userid in the first sheet, how could i use vlookup to find that same userid in the second sheet (if it exists), get the value of the second column of that match, and bring it back to the second column of the first sheet?</p>
  
  <p>thanks</p>