How can one view the execution plan of a SQL statement in Oracle?
To view the execution plan of SQL statements in Oracle, you can use the following method: 1. Use the EXPLAIN PLAN statement: Add “EXPLAIN PLAN FOR” before the SQL statement, then execute the SQL statement. Then use the following command to view the execution plan:
SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY);
2. Utilize the AUTOTRACE function:
In tools like SQL Developer, you can open the AUTOTRACE feature to view the execution plan of SQL statements. Before executing the SQL statement, click on “Tools” -> “Autotrace”, and then execute the SQL statement to see the execution plan in the results window. Alternatively, you can use functions from the DBMS_XPLAN package to obtain the execution plan of SQL statements. You can use the following command to view the execution plan:
SET SERVEROUTPUT ONEXECUTE DBMS_XPLAN.DISPLAY_CURSOR('SQL_ID');
The SQL_ID is the ID of the SQL statement to view the execution plan. Regardless of the method used, you can view the execution plan of the SQL statement in order to optimize query performance.
