oracle数据库迁移的步骤

目的：将192.168.9.102上GGWSXT/[email protected]:1521/ORACLE部署到104上

1、查看原用户表空间

select tablespace_name,count(0) from dba_segments where owner=upper('GGWSXT') group by tablespace_name;

2、查看原用户创建表空间的目录

select * from dba_data_files；

3、为原用户创建表空间

create tablespace TS_GGWSXT_XT

datafile '/步骤2/TS_GGWSXT_XT.bdf' size 2048M

AUTOEXTEND ON NEXT 256M MAXSIZE UNLIMITED

EXTENT MANAGEMENT LOCAL

SEGMENT SPACE MANAGEMENT auto;

4、创建新用户

Create user GGWSXT_01

Identified by GGWSXT_01

Default tablespace TS_GGWSXT_XT

Temporary tablespace TEMP

5、为新用户赋权限

Grant connect,resource,dba,select any table to GGWSXT_01;

grant read,write on directory dpdir to GGWSXT_01;

select * from dba_directories

6、为原用户赋目录权限

grant read,write on directory dpdir to GGWSXT_01;

7、通过expdp（数据泵方式）导出原用户数据 [如果时从11g迁移到10g后面添加 version=10.2.0.1.0低版本]    su - oralce 下执行 

nohup expdp ggwsxt/[email protected]/oracle schemas=ggwsxt dumpfile=ggwsxt_20150713.dmp DIRECTORY=dpdir &

tail －f nohup.out

8、数据库不在一台服务器上，备份文件目录不同时；

select ＊ from dba_directories; 查询导入导出dmp文件的路径 

scp /导出库路径/GGWSXT_20150713.dmp [email protected]:/导入库路径/GGWSXT_20150713.dmp

9、chown oralce.oinstall(或者是dba) GGWSXT_20150713.dmp 

10、通过impdp将数据导入新用户，语句中间无换行

nohup impdp GGWSXT_01/[email protected]/ORACLE directory=dpdir dumpfile=GGWSXT_20150713.dmp remap_schema=GGWSXT:GGWSXT01 remap_tablespace=原用户表空间名：新用户表空间名，原用户表空间名：新用户表空间名 &

（注释：表空间名查询方式select tablespace_name,count(0) from dba_segments where owner=upper('用户名') group by tablespace_name;)

11、数据导入后，需执行一下语句以实现用户对象的重新编译  在plsql中

execute dbms_utility.compile_schema(upper('新用户名GGWSXT_01'));

注：11.5：若导入的是两个有关联的库，请导入之后更新新用户同义词

declare

v_ywuser varchar2(20):='BDSQZBZS';

v_gluser varchar2(20):='BDSQXTGLZS';

v_sql varchar2(512):=null;

begin

  for v_synonym in(select synonym_name,table_owner,table_name from all_synonyms where owner=upper(v_ywuser))

    loop

      v_sql:='create or replace synonym '||v_ywuser||'.'||v_synonym.synonym_name||' for '||v_gluser||'.'||v_synonym.table_name;

      --dbms_output.put_line(v_sql);

      execute immediate v_sql;

    end loop;

    for v_synonym in(select synonym_name,table_owner,table_name from all_synonyms where owner=upper(v_gluser))

    loop

      v_sql:='create or replace synonym '||v_gluser||'.'||v_synonym.synonym_name||' for '||v_ywuser||'.'||v_synonym.table_name;

      --dbms_output.put_line(v_sql);

      execute immediate v_sql;

    end loop;

end;

execute dbms_utility.compile_schema('新用户');