When tissues оverlаp оne аnоther on а radiograph, what is this called?
Cоnstrаints, Triggers (Pаrt 2) — Trigger Instructiоns Yоu аre given the database schema as follows: Ships(name, class, launched) Battles(name, date) Outcomes(ship, battle, result) The database tables have the following semantics: Ships gives information about the ships, where 'name' is the name of ship, 'class' indicates the type of ship, and 'launched' represents the date when the ship is first launched. Battles contains information about battles. Specifically, the 'name' is the name of battle, and 'date' is the date of battle. Outcomes gives information about the battle outcomes. The 'ship' is the name of ship involving in the battle, and 'battle' is the name of battle, and 'result' is the result of the battle. Write a trigger: when inserting an outcome, check that the battle name exists in Battles (rejecting insertions into Outcomes if the battle does't exist). How to complete this question: Write your response in the text box below.