Oracle Top 20 Parallel SQL

SELECT * FROM
(SELECT substr(sql_text,1,100) sql,
ELAPSED_TIME, CPU_TIME,
disk_reads, executions,
disk_reads/executions "Reads/Exec",
hash_value,address
FROM V$SQLAREA
WHERE ( hash_value, address ) in (
SELECT distinct HASH_VALUE, address
FROM v$sql_plan
WHERE DISTRIBUTION is not null )
and disk_reads > 1000
ORDER BY ELAPSED_TIME DESC)
WHERE rownum <= 20;