title: DGET NUM error with criteria
body: <p>DGET functions in my spreadsheet have a problem with criteria strings having the same starting characters. This is a problem. How do I resolve this?</p>
  
  <p>Ex: =DGET(database, field, criterion1)</p>
  
  <p>The database contains entries for criteria values of "ABC" and "ABC_123", say.
  If I call DGET(database, field, "ABC"), it results in a NUM error. What do I do about this? I cannot change the spreadsheet from which the criteria values are extracted for input into the DGET function - for example I can't add columns, etc. I may be able to make some limited changes to the database entries. </p>