查询sql的历史记录
select * from v$sqlarea t where t.PARSING_SCHEMA_NAME in (\'用户名\') order by t.LAST_ACTIVE_TIME desc
select * from v$sqlarea t order by t.LAST_ACTIVE_TIME desc
查看一段时间内的执行情况
select * from v$sqlarea t where ( to_char(t.LAST_ACTIVE_TIME,\'yyyy-mm-dd hh24:mi:ss\') > \'2011-12-28 14:11:39\' ) and (to_char(t.LAST_ACTIVE_TIME,\'yyyy-mm-dd hh24:mi:ss\') < \'2011-12-28 14:11:43\') order by t.LAST_ACTIVE_TIME desc
查询当前时间
select sysdate from dual
查询锁表的情况
select * from v$locked_object;
select b.owner,b.object_name,a.session_id,a.locked_mode from v$locked_object a,dba_objects b where b.object_id = a.object_id;
select b.username,b.sid,b.serial#,logon_time from v$locked_object a,v$session b where a.session_id = b.sid order by b.logon_time;