oracle show running sql queries

1SELECT s.SID,
2       s.USERNAME,
3       OPTIMIZER_MODE,
4       HASH_VALUE,
5       ADDRESS,
6       CPU_TIME,
7       ELAPSED_TIME,
8       SQL_TEXT,
9       SERIAL#
10FROM V$SQLAREA SQLAREA,
11     V$SESSION s
12WHERE s.SQL_HASH_VALUE = SQLAREA.HASH_VALUE
13  AND s.SQL_ADDRESS = SQLAREA.ADDRESS
14  AND s.USERNAME IS NOT NULL;