一、导出有条件数据:
exp zh/mm@signon tables=(tablename1) file=d:\aa.dmp query=\"where ID='C8ECD78D123C42AEA64910C30325CEA7'\"
二、修改字符集：
a.查看字符集 select * from v$nls_parameters
b.客户端:cmd下运行set NLS_LANG=SIMPLIFIED CHINESE_CHINA.ZHS16GBK
c.服务器
sql> 修改字符集
plsql /nolog
connect sys/密码 as sysdba;
shutdown immediate --关闭数据库例程
startup mount; --启动数据库
alter system enable restricted session;
alter system set job_queue_proceses=0;
alter database open;
alter database character set ZHS16GBK;
alter database character set INTERNAL_USE ZHS16GBK; 跳过字符超集检查，直接更改
shutdown immediate;
startup;
三、删除归档日志：
在cmd中输入Rman target sys/oracle@fjzwt
DELETE ARCHIVELOG ALL COMPLETED BEFORE 'SYSDATE-1/24';( 一个小时前的日志)
四、删除重复记录
delete from tabletemplate where id in (select id from tabletemplate group by id having count(*)>1)
and rowid not in (select max(rowid) from tabletemplate group by id having count(*)>1);
五、修改sys密码
进入数据库服务器那台电脑
开始菜单->运行->输入‘CMD’,打开命令提示符窗口，输入如下命令：
orapwd file=D:/oracle/product/11.1.0/db_1/database/pwdctcsys.ora password=newpass
六、存储过程恢复,以sys登录
select object_id from dba_objects where object_name ='存储过程名称'
select * From source$ as of timestamp to_timestamp('2012-11-21 11:00:00', 'yyyy-mm-dd hh24:mi:ss') where obj#=233454;
七、数据回闪
select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') time,to_char(dbms_flashback.get_system_change_number) scn from dual;
create table newTable as select * from Table1 as of timestamp to_timestamp('2012-05-22 10:00:00','yyyy-mm-dd hh24:mi:ss')
八、空表导出
select table_name from user_tables where NUM_ROWS=0;
Select 'alter table '||table_name||' allocate extent;' from user_tables where num_rows=0;
九、Oracle 返回有重复的记录 ：
select id from A group by id having count(id) > 1;
十、分页存储过程：
procedure PRO_GetList(p_begin in number,p_end in number,p_out out p_cur)
is
begin
open p_out for
select * from (SELECT a.* ,rownum r_num FROM Ta a
where rownum <=''|| p_end ||'') where r_num>''|| p_begin ||'';
end;
十一、存储过程循环：
procedure PRO_UpdataOrderID(p_ID in varchar,p_orderID in varchar)
is
position integer;
ID_TmpStr varchar2(64);
ID_Str varchar2(4000);
orderID_TmpStr varchar2(64);
orderID_Str varchar2(4000);
begin
ID_Str := p_ID;
orderID_Str:=p_orderID;
While Instr(ID_Str, ',', 1, 1) > 0 Loop
position := Instr(ID_Str, ',', 1, 1);
ID_TmpStr := Substr(ID_Str, 1, position - 1);
ID_Str := SubStr(ID_Str, position + 1, length(ID_Str));
position := Instr(orderID_Str, ',', 1, 1);
orderID_TmpStr := Substr(orderID_Str, 1, position - 1);
orderID_Str := SubStr(orderID_Str, position + 1, length(orderID_Str));
update Users set OrderID= orderID_TmpStr where ID= ID_TmpStr;
end loop;
if not ID_Str is null then
--将最后一个保存
update Users set OrderID= orderID_Str where ID= ID_Str;
end if;
end;
)
