Hi, I have 3 tables: * db.familia * db.familia_riesgo * db.riesgo
db.familia_riesgo has just familia.id and riesgo.id (the id of db.familia and db.riesgo). This is a many to many relationship between db.familia and db.riesgo tables. How can I validate that the same riesgo.id doesn't repeat for the same familia.id in db.familia_riesgo? Help is very much appreciated. regards.
