title: Table field that holds row count from another table
body: <p>I have a field where I want to store the number of certain rows from another table. I have been incrementing this value when the rows are created, but feel this is probably not the best way. THen again I dont think that doing "count" on the table in question every time makes sense either. what is best approach?</p>
  
  <p>EDIT:
  Count is filtered</p>