フリー問題

問題文

Inside a trigger that fires for each row of an UPDATE, a body reads the qualifier that points at the row as it stood beforehand. What does that qualifier give?

選択肢

1. That qualifier therefore yields the generated contents for each row it touches.
2. That qualifier therefore yields the former contents for each row it touches.
3. That qualifier therefore yields the arriving contents for each row it touches.
4. That qualifier therefore yields the mixed contents for each row it touches.