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Advanced Oracle PL/SQL Developer's Guide (Second Edition)

You're reading from   Advanced Oracle PL/SQL Developer's Guide (Second Edition) Master the advanced concepts of PL/SQL for professional-level certification and learn the new capabilities of Oracle Database 12c

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Product type Paperback
Published in Feb 2016
Publisher
ISBN-13 9781785284809
Length 428 pages
Edition 2nd Edition
Languages
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Author (1):
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Saurabh K. Gupta Saurabh K. Gupta
Author Profile Icon Saurabh K. Gupta
Saurabh K. Gupta
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Toc

Table of Contents (14) Chapters Close

Preface 1. Overview of PL/SQL Programming Concepts FREE CHAPTER 2. Oracle 12c SQL and PL/SQL New Features 3. Designing PL/SQL Code 4. Using Collections 5. Using Advanced Interface Methods 6. Virtual Private Database 7. Oracle SecureFiles 8. Tuning the PL/SQL Code 9. Result Cache 10. Analyzing, Profiling, and Tracing PL/SQL Code 11. Safeguarding PL/SQL Code against SQL injection 12. Working with Oracle SQL Developer Index

SQL query Result Cache


You can store the results of a SQL query in the SQL query result cache in three ways:

  • Enabling automatic result cache at the database level: Automatic SQL result caching is enabled by setting the initialization parameter RESULT_CACHE_MODE to FORCE, which enforces caching for all the SQL statements. However, you can prevent specific SQL queries from exhausting the Server Result Cache by using the NO_RESULT_CACHE hint.

  • Enabling automatic result cache at the table level: You can set RESULT_CACHE mode to FORCE for a particular table so that the results from the queries on this table will be cached in the query result cache.

    ALTER TABLE my_objects RESULT_CACHE (MODE FORCE)
    /

    You can specify a NO_RESULT_CACHE hint to avoid the cache lookup operation for a query using the cache enforced table, and even rollback the caching mode to MANUAL.

  • Manually annotating selective SQL queries: You can also specify a RESULT_CACHE hint in a frequently executed SQL query to cache its results...

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