SELECT
  '--#SET FREQENCY ' concat
  char(a.num_executions) concat X'0A' concat
  ,a.stmt_text concat ';'
FROM <SCHEMA>.<TABLE> a
WHERE length(stmt_text)< 32000
AND num_executions > 0
ORDER BY total_exec_time / num_executions DESC
FETCH FIRST 20 ROWS ONLY
;