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    Guided course · Data Access in .NET

    SQL Server for .NET Developers: back to the course

    Module 2 · Indexes and Execution Plans · Lesson 6 of 15

    Statistics and Cardinality Estimates: Histograms, Stale Stats and the Ascending Key Problem

    16 min readTechInterviewNotes Editorial TeamUpdated 13 Oct 2026Save

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    Its text, video and cheat sheet open with Full Access. This course's free lessons open without an account. Start with How SQL Server Stores a Table: Heaps, Clustered Indexes and B+ Trees.

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