Important events

--查看事件描述
SELECT
    eq_name              "Enqueue",
    ev.name              "Enqueue Type",
    eq.req_description   "Description"
FROM
    v$enqueue_statistics   eq,
    v$event_name           ev
WHERE
    eq.event# = ev.event#
    AND ev.name LIKE '%TX%row lock%'
ORDER BY
    ev.name;