CHAPTER 6. "Hints" and CHAPTER 7. "Reading execution plan" have been added to Overview of Oracle architecture and performance tuning. Part 2.
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CHAPTER 5. "Join methods and types" have been added to Overview of Oracle architecture and performance tuning. Part 1.
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CHAPTER 3. "Tuning. Statistics. Execution plan." and CHAPTER 4. "Table and index scan" have been added to Overview of Oracle architecture and performance tuning. Part 1.
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Short overview about most popular topics as "task-answer" format:
Overview of Oracle architecture and performance tuning. Part 1.
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All Oracle articles from https://ddanil/index.php/programming/sql have been updated.
New information has been added and some errors have been fixed.
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Website updated (new PHP version, security patches, bug fixes, etc.).
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Added to Oracle articles: some new info (difference between NVL and COALESCE, etc.), fixed errors, ... To Overview of group, analytical, and hierarchical queries added new functions (FIRST, LAST, NTILE).
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In SQL added Overview of group, analytical, and hierarchical queries.
Some examples helps understand it quickly.
Try to solve it.
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Welcome to new version of ddanil.com
Imroved style and perfomance.
Now site have topics about:
1) Training examples for Oracle exams 1z0-071, 1z0-149 and some materials about Oracle Database;
2) VBA connection info to Oracle Database and some materials about VBA and Excel;
3) Info about accounting entries and rules with examples (according to Federal Law about Accounting in Russian Federation №402).
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