I have an assignment where I have to design a logical model using SQL developer.

I am converting a conceptual model to a logical model. And I Have a relation NURSE that has "nurse\_id" and "certification". The certification attribute has yes/no values. 

**My question is:**
Should I move the yes/no attribute to a new relation? or is it okay to keep it in the same NURSE relation. What is the best practise.

and is the suitable data type for that attribute (CHAR)?

Thank you,