最近一个月外出支援
做数据迁移
之前不怎么使用oracle，也是现学现用的 ，这过程中发现oracle真心强大，比mysql强好多
期间写了一些sql，现在保存一下，权当模板了
查看操作进程的剩余时间（第一句）：
SELECT c.STATUS,time_remaining/60 剩余时间分钟,sql_text 执行SQL,machine,message
FROM V$SESSION_LONGOPS a inner join v$sql b on
a.sql_hash_value = b.hash_value
inner join v$session c on a.sid = c.sid
where sofar<totalwork
order by time_remaining desc
select sid,message,time_remaining, start_time,last_update_time,elapsed_seconds from V$SESSION_LONGOPS where time_remaining>0;
select sid,message,time_remaining, start_time,last_update_time,elapsed_seconds from V$SESSION_LONGOPS Order By start_time Desc
select sid,message,time_remaining, start_time,last_update_time,elapsed_seconds from V$SESSION_LONGOPS Order By last_update_time Desc;
查看被锁的表：
select object_name,machine,s.sid,s.serial#
from v$locked_object l,dba_objects o ,v$session s
where l.object_id = o.object_id and l.session_id=s.sid;
解锁
alter system kill session '139,213';
select * from gv$process
where addr in (
select paddr from gv$session where sid =72);
Select * from v$session_wait where sid=139
SELECT sid, total_waits, time_waited
FROM v$session_event
WHERE event='db file sequential read' And sid=72 and total_waits>0;
select t2.username,t2.sid,t2.serial#,t2.logon_time
from v$locked_object t1,v$session t2
where t1.session_id=t2.sid order by t2.logon_time;
创建序列：
-- Create sequence
create sequence xulie
minvalue 1
maxvalue 9999999999999999999999999999
start with 11602214
increment by 1
cache 20
cycle;
xulie.Nextval
创建索引：
Create Index 名字On tablename(字段);
删除索引：
drop index 名字
一些基本的语句：
Update tableA a Set aaa=(Select bbbFrom tableB b Where a.id=b.id)；
Update tableA a Set aaa=(a.aaa||'0') ;
Insert Into t_nota_apply_user( ) Select From aaa ;
Update aaaaa Set OLDSTATUS=-1 Where oid In(Select Max(oid) From aaa Group By a, b Having Count(1)>1)
Update aaaaa Set OLDSTATUS=-1 Where oid In(Select Max(oid) From aaa Group By a, b Having Count(1)=1)
Select * From aaaa a Inner Join bbbbb b On a.id=b.id
Select Sum(amount) As totalmount,id,code From aaaaa Group By id,code
