Question 125 of 963

How to Revert an Automatic Tuning Plan Correction in Azure SQL Database

This DP-300 practice question tests your understanding of monitor, configure, and optimize database resources. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

You have an Azure SQL Database with automatic tuning enabled. You notice that a query that previously ran quickly is now running slower. Automatic tuning has implemented a plan correction. However, the new plan is performing worse. What should you do to revert to the previous behavior?

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

Revert the automatic tuning plan correction using the Azure portal or T-SQL

The correct answer is D. When automatic tuning implements a plan correction that performs worse, you can manually revert the plan correction using the Azure portal or T-SQL commands (e.g., `ALTER DATABASE ... SET AUTOMATIC_TUNING ...` or querying `sys.dm_db_tuning_recommendations` and using the `revert` action). Option A is incorrect because dropping and recreating the index does not revert the plan correction; it may force a new plan but is not the direct revert method. Option B is incorrect because automatic tuning does not automatically revert a plan correction that is performing worse; it may later adjust, but manual intervention is the reliable way. Option C is incorrect because disabling automatic tuning would only prevent future corrections but not revert the current one; the plan would remain until manually reverted or statistics change.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • Drop and recreate the index used by the query

    Why it's wrong here

    Index recreation may not revert the plan correction.

  • Wait for automatic tuning to revert the plan automatically

    Why it's wrong here

    Automatic tuning does not automatically revert; it may create another correction.

  • Disable automatic tuning for the database

    Why it's wrong here

    Disabling stops new corrections but does not revert the current one.

  • Revert the automatic tuning plan correction using the Azure portal or T-SQL

    Why this is correct

    You can revert the plan to the previous one manually.

    Related concept

    Read the scenario before looking for a memorised answer.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.

Detailed technical explanation

How to think about this question

This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.

KKey Concepts to Remember

  • Read the scenario before looking for a memorised answer.
  • Find the constraint that changes the correct option.
  • Eliminate answers that are true in general but not in this case.
  • Use explanations to understand the rule behind the answer.

TExam Day Tips

  • Underline the problem statement mentally.
  • Watch for words such as best, first, most likely and least administrative effort.
  • Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.

What to study next

Got this wrong? Here's your next step.

Identify which DP-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.

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FAQ

Questions learners often ask

What does this DP-300 question test?

Monitor, configure, and optimize database resources — This question tests Monitor, configure, and optimize database resources — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Revert the automatic tuning plan correction using the Azure portal or T-SQL — The correct answer is D. When automatic tuning implements a plan correction that performs worse, you can manually revert the plan correction using the Azure portal or T-SQL commands (e.g., `ALTER DATABASE ... SET AUTOMATIC_TUNING ...` or querying `sys.dm_db_tuning_recommendations` and using the `revert` action). Option A is incorrect because dropping and recreating the index does not revert the plan correction; it may force a new plan but is not the direct revert method. Option B is incorrect because automatic tuning does not automatically revert a plan correction that is performing worse; it may later adjust, but manual intervention is the reliable way. Option C is incorrect because disabling automatic tuning would only prevent future corrections but not revert the current one; the plan would remain until manually reverted or statistics change.

What should I do if I get this DP-300 question wrong?

Identify which DP-300 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Same concept, more angles

2 more ways this is tested on DP-300

These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.

Variation 1. You manage an Azure SQL Database that has automatic tuning enabled. You receive an alert that the database is experiencing plan regression. The automatic tuning has forced a plan, but performance is still poor. What should you do first?

medium
  • A.Disable automatic tuning and create a plan guide.
  • B.Review the Query Store to identify the root cause of regression.
  • C.Manually revert to the previous plan using Query Store.
  • D.Scale up the database to reduce resource pressure.

Why B: Option B is correct because Query Store can show plan history and regression details, helping analyze why the forced plan is not optimal. Option A is wrong because reverting may cause further regression. Option C is wrong because manual plan guide may be too drastic. Option D is wrong because scaling up doesn't address plan quality.

Variation 2. You are managing an Azure SQL Database that has Automatic Tuning enabled. You receive an alert that a query plan regression was detected and a plan correction was automatically applied. You want to verify the performance improvement. What should you use?

easy
  • A.Use sys.dm_exec_query_stats to view current performance.
  • B.Review the Azure Monitor alert details.
  • C.Query the Query Store to compare query performance before and after the plan change.
  • D.Check the automatic tuning log in the Azure portal.

Why C: Option C is correct because Query Store provides detailed query performance data, including plan regressions and improvements. Option A is wrong because sys.dm_exec_query_stats gives current performance metrics but does not provide historical comparison. Option B is wrong because Azure Monitor alert details only notify that a regression occurred, not the performance improvement. Option D is wrong because the automatic tuning log shows actions taken but not detailed performance metrics for comparison.

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Last reviewed: Jun 21, 2026

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