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Ways to Tune the Queries in SQL and Type of Indexes

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There are many methods to tune up a query. 1) using EXPLAIN_PLAN. 2) using AUTOTRACE and set Timing ON. 3) tkprof 4) Indexes 5) Cost- based Optimisation 6) Analyze command. 7) parallel query option. Types of indexes B-tree Bitmap Hash Index-organized table Reverse key Function-based Partitioned (local and global) Bitmap join indexes
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