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    Free Oracle DBA Tutorials

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    • Free Oracle DBA Tutorials
    • Tuning queries that project scalar subqueries

    Tuning queries that project scalar subqueries
    Duration: 7 minutes

    John Watson
    Free Oracle DBA Tutorials

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    The ability to project scalar subqueries is very useful, and many developers rely on it. But! The cost of correlating the subquery may be astronomical. This tutorial shows how to read the execution plan, and how to rewrite the query (safely) to a much more efficient structure.

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      • Lecture1.1
        Projecting Subqueries
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        7m
    John Watson
    https://skillbuilders.com/our_team/john-watson/

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