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Query Optimization and Execution Plans

When a customer says a query is slow, the answer lives in the execution plan, not in intuition. Reading a plan tells you whether the engine is scanning when it should seek, exploding rows in a join, or shuffling across a network, and those three causes have nothing in common except the symptom.

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LESSONS THAT TEACH THIS

Hard DeploymentsThe database remembers what the meeting does not18 min→

PRACTICE THIS IN REAL QUESTIONS

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