Comparing Execution Plans with DBMS_XPLAN in Oracle 19c / 21c
Understanding how two different execution plans differ is a critical skill for performance tuning. In Oracle 19c and 21c, the DBMS_XPLAN package has evolved to include built-in functions that let you compare plans directly: COMPARE_PLANS, COMPARE_CURSOR, and COMPARE_EXPLAIN. In this post, we will: Environment Setup First, create a test user and a simple table to […]