Oracle DB Optimization Question:

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Explain Execution Plan?

Oracle Database Optimization Interview Question
Oracle Database Optimization Interview Question

Answer:

SQL Server caches the plan of execution of query or stored procedure which it uses in subsequent call.
This is a very important feature with regards to performance enhancement.
You can view execution plan of data retrieval graphically or textually.

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Do you know what are the ways to code efficient transactions?Tell me some reasons of poor performance of query?