本文深入探讨了SQL查询在数据库管理系统中的应用，包括查询结构、优化策略以及常见问题解决方法，旨在帮助开发者提高查询效率并减少资源消耗。
select p.spid,
c.object_name,
b.session_id,
b.oracle_username,
b.os_user_name,
a.machine,
a.program
from v$process p, v$session a, v$locked_object b, all_objects c
where p.addr = a.paddr
and a.process = b.process
and c.object_id = b.object_id
order by b.session_id
c.object_name,
b.session_id,
b.oracle_username,
b.os_user_name,
a.machine,
a.program
from v$process p, v$session a, v$locked_object b, all_objects c
where p.addr = a.paddr
and a.process = b.process
and c.object_id = b.object_id
order by b.session_id
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