title: How to implement many to many relationship using Oracle Apex 3.2 form?
body: <p>I have a many to many relationship on 2 tables.</p>
  
  <p>table1 - primary key = link_id + other fields</p>
  
  <p>table2 - primary key = category_id + other fields</p>
  
  <p>table3 - primary key = link_id + category_id (no other fields in the table)</p>
  
  <p>I'm just wondering how can I implement this on Apex 3.2.</p>
  
  <p>The 2nd table is just the possible categories that can apply to a link. (e.g. Training, Prevention, Mental health and etc). 1 link can have many categories attached to it.</p>
  
  <p>I'm hoping all the possible categories will appear on the screen as a checkbox and then when I open a link record (e.g. Mental health and training categories are assigned to the record), the corresponding checkbox will be automatically ticked. And of course, the ability to tick/untick checkboxes as I please and save/update the record.</p>
  
  <p>I've looked at examples but I cannot find them.</p>
  
  <p>Thanks</p>