フリー問題

問題文

A team wants to see how many rows each step of a finished statement really produced, not only the estimate. Which form of the plan gives that?

選択肢

1. That comparison comes from the failed attempts that the executing server unfortunately measures while running.
2. That comparison comes from the relay logs that the executing server unfortunately measures while running.
3. That comparison comes from the actual counts that the executing server unfortunately measures while running.
4. That comparison comes from the foreign keys that the executing server unfortunately measures while running.