Find Top Disk Reads in Oracle

DEFINE access_level = 1000 (NUMBER)
	COLUMN parsing_user_id FORMAT 9999999 HEADING 'User Id'
	COLUMN executions FORMAT 9999 HEADING 'Exec'
	COLUMN sorts FORMAT 99999 HEADING 'Sorts'
	COLUMN command_type FORMAT 99999 HEADING 'CmdT'
	COLUMN disk_reads FORMAT 999,999,999 HEADING 'Block Reads'
	COLUMN sql_text FORMAT a40 HEADING 'Statement' WORD_WRAPPED
	SET LINES 130 VERIFY OFF FEEDBACK OFF
SELECT
	USERNAME, executions,
	sorts,command_type,
	disk_reads,sql_text
	FROM
	v$sqlarea a, dba_users b
	WHERE
	disk_reads > 1000 and
        parsing_user_id = b.USER_ID
	ORDER BY
	disk_reads desc;