query optmization techniques and quwry
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Answer Posted / Mamta Rani
Query optimization is a process of improving the efficiency of SQL queries by modifying their structure to run faster, consume fewer system resources, and produce more accurate results. Here are some general query optimization techniques:
1. Indexing
2. Normalization
3. Joins instead of subqueries
4. Using EXPLAIN PLAN to analyze execution plans
5. Partitioning large tables
6. Avoiding SELECT * FROM and using specific column names
7. Reducing the use of ORDER BY, DISTINCT, and GROUP BY in large datasets
8. Caching results with materialized viewsnFor more detailed information on query optimization techniques and tools like Query Analyzer, Projects, and PPTs (PowerPoint presentations), consult Oracle documentation or online resources.
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