title: How to return results on a sepcific query?
body: <p>Basically I have a table with a product list and 2 binary fields, such as, requires signature, requires tracking.</p>
  
  <p>Then I have a list of couriers, that also have those 2 boolean fields.</p>
  
  <p>I want to return a list of all couriers we can use for a specific product, knowing that a product that has yes in one binary field needs a yes in the other one. But no can have a yes or no on the other table.</p>
  
  <pre><code>ProductNumber trackingrequired signaturerequired
  123               yes                     no
  
  CourierID trackingrequired signaturerequired
  1                    yes                     yes
  2                    no                       no
  3                    yes                     no
  4                   no                       yes
  5                    yes                     no
  </code></pre>
  
  <p>Query would return 1 3 and 5:</p>
  
  <pre><code>ProductNumber CourierID
  123              1
  123              3
  123              5
  </code></pre>
  
  <p>Since the signature is not required, the data on the second column is irrelevant for this case. I'm happy to change the way the data is stored if necessary. 
  I am using MSAcess.</p>