oracle中查詢鎖表

查詢表被鎖住

--查詢被鎖的表
select b.owner,b.object_name,a.session_id,a.locked_mode from v$locked_object a,dba_objects b where b.object_id = a.object_id;
--查看是哪個session引起的
select b.username,b.sid,b.serial#,logon_time from  v$locked_object a,v$session b where a.session_id = b.sid order by b.logon_time;
--殺掉對應進程即解鎖
alter system kill session '1190,3103';

查詢存儲過程被鎖住

--查詢存儲過程被鎖
--查V$DB_OBJECT_CACHE
SELECT * FROM V$DB_OBJECT_CACHE WHERE name='P_QUERY_BILL_LIST' AND LOCKS!='0';
--按對象查出sid的值
select /*+ rule*/  SID from V$ACCESS WHERE object='P_QUERY_BILL_LIST';
--查sid,serial#
SELECT SID,SERIAL#,PADDR FROM V$SESSION WHERE SID in ('1160');
--殺掉對應進程即解鎖
alter system kill session '1160,41565';

數據庫數據被刪掉，恢復刪掉的數據

--數據庫恢復
insert into sys_user_t value(
select * from sys_user_t as of timestamp to_timestamp('2019-10-17 10:20:00','yyyy-mm-dd hh24:mi:ss')
)

查詢數據庫對象（表，存儲過程等）什么時候被修改過

-- 查詢最后修改的對象
SELECT  object_name,CREATED,LAST_DDL_TIME from user_objects order by last_ddl_time desc;
SELECT  object_name,CREATED,LAST_DDL_TIME from user_objects order by created desc;

oracle查詢數據庫編碼

-- 編碼
select userenv('language')from dual

設置本地環境變量

環境變量名：NLG_LANG
環境變量值：SIMPLIFIED CHINESE_CHINA.ZHS16GBK