Answer
Query Store tracks query history, execution plans, and performance trends.
It helps diagnose regressions and enforce stable plans.
Quick Answer
Query Store is a built-in SQL Server feature that captures query text, execution plans, and runtime stats over time. When a query suddenly gets slower (plan regression), Query Store can show you the old fast plan and let you force it back. Essential for diagnosing intermittent performance problems.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ