In this window, user can specify a key for Tuning to use. In SQL Tuning, user can click on the pulldown menu Actions SQL Tuning Register to open a 'SQL Optimizer Authorization Key' window. The Quest Central SQL Tuning license has a maximum server restri 26924. I have SQL Tuning module installed for both Quest Central and TOAD. Perform SQL tuning and pinpoint potential performance degradation. Toad for Oracle Xpert edition includes all of Toad's standard features.