SQL> help set;
Set commands:
SET -- display current SET options
SET AUTOddl -- toggle autocommit of DDL statements
SET BAIL -- toggle bailing out on errors in non-interactive mode
SET BLOB [ALL|<n>] -- display BLOBS of subtype <n> or ALL
SET BLOB -- turn off BLOB display
SET COUNT -- toggle count of selected rows on/off
SET MAXROWS [<n>] -- limit select stmt to <n> rows, zero is no limit
SET ECHO -- toggle command echo on/off
SET EXPLAIN -- toggle display of query access plan in the explained form
SET HEADING -- toggle display of query column titles
SET KEEP_TRAN_params -- toggle to keep or not to keep text of following successful SET TRANSACTION statement
SET LIST -- toggle column or table display format
SET NAMES <csname> -- set name of runtime character set
SET PER_TABle_stats -- toggle display of detailed per-table statistics
SET PLAN -- toggle display of query access plan
SET PLANONLY -- toggle display of query plan without executing
SET SQL DIALECT <n> -- set sql dialect to <n>
SET STATs -- toggle display of performance statistics
SET TIME -- toggle display of timestamp with DATE values
SET TERM <string> -- change statement terminator string
SET WIDTH <col> [<n>] -- set/unset print width to <n> for column <col>
All commands may be abbreviated to letters in CAPitals