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  • odu恢复truncate 表

    生成测试表
    conn liang/chengce243
    create table tab_01(id int,name VARCHAR2(128));
    insert into tab_01
    select OBJECT_ID,OBJECT_NAME
    from dba_objects where rownum<=10000;
    commit;
     
    create table tab_03 as select * from tab_01;
    truncate table tab_03;
     
     
    恢复的步骤为:
    OFFLINE表所在的表空间
    生成数据字典:unload dict
    扫描数据:scan extent
    恢复表:unload table username.tablename object auto
    ONLINE表所在的表空间
     
    set linesize 180
    col FILE_NAME for a50
    col VALUE for a8
    select ts#,file_id fno#,file_id rfno#,file_name,value
     from V$tablespace t,dba_data_files d,v$parameter p
     where t.name=d.tablespace_name
     and p.name='db_block_size';
    把查询结果贴到control.txt;
     
    修改配置文件config.txt output_format 为 DMP
    [oracle@hncdf odu]$ cat config.txt 
    byte_order little
    block_size 8192
    db_timezone -7
    client_timezone 8
    data_path data
    charset_name ZHS16GBK
    ncharset_name AL16UTF16
    output_format DMP
    lob_storage infile
    clob_byte_order little
     
     
    OFFLINE表所在的表空间
    SQL> alter tablespace users offline;
     
    做一个Checkpoint,让ODU能够读到最新的数据字典数据。
    SQL> alter system checkpoint;
     
     
    ODU> unload dict
     
     
    ODU> scan extent tablespace 4
     
    ODU> unload table liang.tab_03 object auto
    Auto mode truncated table.
     
    Unloading table: TAB_03,object ID: 87361
    Unloading segment,storage(Obj#=87361 DataObj#=87361 TS#=4 File#=4 Block#=218 Cluster=0)
    10000 rows unloaded
     
     
    将测试表所在的users表空间online:
    SQL> alter tablespace users online;
     
    使用imp导入数据
    imp liang/chengce243 file=data/LIANG_TAB_03.dmp
     
     生成测试表
    conn liang/chengce243
    create table tab_01(id int,name VARCHAR2(128));
    insert into tab_01
    select OBJECT_ID,OBJECT_NAME
    from dba_objects where rownum<=10000;
    commit;
     
    create table tab_03 as select * from tab_01;
    truncate table tab_03;
     
     
    恢复的步骤为:
    OFFLINE表所在的表空间
    生成数据字典:unload dict
    扫描数据:scan extent
    恢复表:unload table username.tablename object auto
     
     
    set linesize 160
    col name for a40
    select ts#,file#,rfile#,name from v$datafile;
    把查询结果贴到control.txt;
     
    修改配置文件config.txt output_format 为 DMP
    [oracle@hncdf odu]$ cat config.txt 
    byte_order little
    block_size 8192
    db_timezone -7
    client_timezone 8
    data_path data
    charset_name ZHS16GBK
    ncharset_name AL16UTF16
    output_format DMP
    lob_storage infile
    clob_byte_order little
     
     
    OFFLINE表所在的表空间
    SQL> alter tablespace users offline;
     
    做一个Checkpoint,让ODU能够读到最新的数据字典数据。
    SQL> alter system checkpoint;
     
     
    ODU> unload dict
     
     
    ODU> scan extent tablespace 4
     
    ODU> unload table liang.tab_03 object auto
    Auto mode truncated table.
     
    Unloading table: TAB_03,object ID: 87361
    Unloading segment,storage(Obj#=87361 DataObj#=87361 TS#=4 File#=4 Block#=218 Cluster=0)
    10000 rows unloaded
     
     
    将测试表所在的users表空间online:
    SQL> alter tablespace users online;
     
    使用imp导入数据
    imp liang/chengce243 file=data/LIANG_TAB_03.dmp fromuser=liang touser=liang
     
    参考文档:http://www.laoxiong.net/category/odu
     
     
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  • 原文地址:https://www.cnblogs.com/liang545621/p/12611580.html
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