Hello, I Am trying to show in a table (in the front) some comments to a date shortlisted. That is to say, in agreement with one to have different aspects to see according to years selecion and specific lapel months. As soon as the period selected by means of a button can go to another card that shows "comments", the disadvantage arises when there are no comments for this period. When it takes place they must exhibit a cartel that he says there are no comments for this period. The problem is that he is a model of independent table, to say that it does not have the external key. It is not how to do that a condition that if this period is "void" the comments do not show. From already thank you very much!
