below is the "battleships” database schema: Classes(class, type, country, numGuns, bore, displacement) Ships(name, class, launched)Battles(name, date)Outcomes(ship, battle, result) Write the...

below is the "battleships” database schema: Classes(class, type, country, numGuns, bore, displacement) Ships(name, class, launched) Battles(name, date) Outcomes(ship, battle, result) Write the following as SQL Assertions: 1) No country may have both battleships and battle-cruisers. 2) For every class, there is a ship with the name of that class.