This document provides an overview of SQLT XPLORE, a free SQL tuning tool from Oracle that discovers multiple execution plans for a SQL statement by iterating over CBO parameters and optimizer fixes. It can be used to analyze SQL performance regressions after upgrades, find better performing plans, and diagnose query transformation errors. The tool takes a SQL script as input and outputs an HTML report, SQL Monitor data, and execution logs showing the plans found for each parameter combination tested.