–Display the sql commands or PL/sql statements
SET ECHO ON

–Display Exec results of the sql commands or PL/sql statements
SET FeedBACK ON

–Display output that DBMS_OUTPUT generates.
SET SERVEROUTPUT ON

–Hide the heading of a select result.
SET HEADING OFF

–Hide the output on the screen when spooling
SET TERMOUT OFF

–Hide timestamp in the output file
SET TI OFF

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