Checking dayly data is added

Hello, I’ve got a table data, and due to workflow constrains, only a daily data must be typed (it is easy to solve) but furthermore, every day have to exist one data. So, if a data isn’t entered today, tomorrow the app should warn, and it shouldn’t let you enter tomorrow’s data if you don’t enter today’s one before. How can I do it?
I have tried to create a control colunm where I calculate the intervale between the date of 2 consecutive registers (It must be 1) and writing at the “valid if” field ([_this]=1], but it doesn’t work.
Can somebdy help me?

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