<ul><li>EXPLAIN PLAN is used before the query is executed to provide an execution plan for how Oracle intends to run the SQL statement.</li><li>It helps identify potential inefficiencies and optimize the query before execution.</li><li>DBMS_PROFILER is used after the execution of PL/SQL code to collect performance data like the time spent on each line of code and number of times each statement was executed.</li><li>It helps identify bottlenecks and performance issues in PL/SQL logic and optimize the code.</li></ul>

EXPLAIN PLAN & DBMS_PROFILER Explanation

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