Oracle
1Z0-054 · Question #40
A user in a session executed the following SQL statement to set the optimizer mode: ALTER SESSION SET OPTIMIZER_MODE = ALL_ROWS What impact would it have on the goal of the optimizer for that…
The correct answer is A. Statement level OPTIMIZER_MODE hints take precedence over the session-level setting. D. The optimizer uses a cost-based approach for all SQL statements in the session, regardless of. See the full explanation below for the reasoning.
Question
A user in a session executed the following SQL statement to set the optimizer mode:
ALTER SESSION SET OPTIMIZER_MODE = ALL_ROWS What impact would it have on the goal of the optimizer for that session? (Choose all that apply.)
Options
- AStatement level OPTIMIZER_MODE hints take precedence over the session-level setting.
- BThe OPTIMIZER_MODE parameter set at instance level takes precedence over the session-level
- CThe optimizer uses a cost-based approach, regardless of the presence of statistics;
- DThe optimizer uses a cost-based approach for all SQL statements in the session, regardless of
How the community answered
(55 responses)- A73% (40)
- B9% (5)
- C18% (10)
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