SAP query, tracking, monitoring, and SQL Execution Plan

Sm66 can view the runningProgramAnd execution time.
St04 can monitor many sessions,
Click: Detailed analysis list. You can select an analysis and monitoring session. For example, you can select an oracle session to view the SQL statements being executed.
You can click the SQL statement to be monitored to go to the details page. Click the Execution Plan (CTRL + Shift + F6) to analyze the query efficiency and index usage through the execution plan.
(CTRL + Shift + F8), you can find the program called by the SQL language name.

Concatenation: the order in which the index is used. If the query condition is a non-primary key index, you can add the index to improve the query efficiency, but you do not agree to it too much.
Alter session allows you to view the conditions given by the current query, some of which are added by the system,