title: How to select records that do not exist in two (or more) tables
body: <p>I have 3 tables of accounts that all contain the same fields. Table1 contains all accounts while Table2 and Table3 contain subsets of the accounts. I'm trying to select records in Table1 that do no exist in Table2 or Table3.</p>
  
  <p>Let's say the table layout is like this and is the same for all 3 tables:
  |AcctNum|Name|State|</p>
  
  <p>I know how to do this if it was just Table1 and Table2, using a left join and Is Null, but the 3rd table is throwing me.  Is this possible to do in one query?  Can you combine left joins?  I should point out I'm using Access 2010.</p>