oracle 数据泵迁移笔记

今天给大家分享oracle 数据泵迁移笔记，废话不多说代码如下！

统计数据文件大小
rman target /

report schema;

exit

统计数据库用户
select USERNAME,USER_ID,CREATED from dba_users order by 2 desc;

统计数据量
Select sum(bytes) from dba_segments;

查看数据库字符集及国家字符集
select value from v$nls_parameters where parameter='NLS_CHARACTERSET';

select value from v$nls_parameters where parameter='NLS_NCHAR_CHARACTERSET';

 

查询哪些表空间含XMLTypes:
         注：自Oracle 10gR2开始，可以传输含XMLTypes的表空间，不过必须使用IMP/EXP而不能选择数据泵（IMPDP/EXPDP），并确保IMP/EXP命令的CONSTRAINTS和TRIGGERS参数设置为Y。

         select distinct p.tablespace_name from dba_tablespaces p, dba_xml_tables x, dba_users u, all_all_tables t where t.table_name = x.table_name and t.tablespace_name = p.tablespace_name and x.owner = u.username;

 

统计表空间大小及空闲
select f.tablespace_name,a.total,f.free,round((f.free/a.total)*100) "% Free" from (select tablespace_name,sum(bytes/(1024*1024)) total from dba_data_files group by tablespace_name) a,(select tablespace_name,round(sum(bytes/(1024*1024))) free from dba_free_space group by tablespace_name) f where a.tablespace_name=f.tablespace_name(+) order by "% Free";

 

查看无效对象
select count(*) from all_objects where owner in ('SCHEMA1','SCHEMA2',...) and status='INVALID';

---执行处理无效对象的脚本

@?/rdbms/admin/utlrp

select count(*) from all_objects where owner in ('SCHEMA1','SCHEMA2',...) and status='INVALID';

 

查看DBLINK
select owner,object_name,object_type from dba_objects where object_type='DATABASE LINK';

         注：当前用户的DBLINK不支持用于数据泵导出或导入，其他DBLINK正常

 

8.查看DBMS_JOB产生的JOB（DBMS_SCHEDULER创建的JOB强制导出或导入）

select count(*) from dba_jobs where schema_user in ('SCHEMA1','SCHEMA2',...);

         注：

                   -dba_jobs

                            不包括export/import产生的job

                            由DBMS_JOB创建

                            受exclude、include参数限制导出导入

                   -dba_scheduler_jobs(替代dba_jobs)

                            由DBMS_SCHEDULER.CREATE_JOB创建

                            不受exclude、include参数限制，强制导出导入

 

         -bug：按schema导出时，由dbms_job生成的job不导出，由dbms_scheduler生成的正常导出

                            --全库导出正常

                            --在11.2, 10.2.0.5, 11.1.0.7中修复

待迁移对象的总数
select count(*) from all_objects where owner in ('SCHEMA1','SCHEMA2',...);

待迁移对象的类型
select object_type,count(1) as "NUM" from all_objects where owner in ('SCHEMA1','SCHEMA2',...) group by object_type;

 

创建数据泵目录
select * from dba_directories;

create directory dpdir as '/tmp/dpdir';

 

*导出前，注意system表空间和归档存放空间，推荐system表空间至少20GB剩余，关闭归档日志

导出数据
$ expdp \"/ as sysdba\" DIRECTORY=dpdir DUMPFILE=jzzf%U.dmp logfile=jzzf_expdp.log filesize=3G cluster=N exclude=STATISTICS schemas=SCHEMA1,SCHEMA2,...

 

其他:

---查看数据泵job

         select * from dba_datapump_jobs;

---查看exclude参数可以排除的对象

         col object_path for a70

         col comments for a70

         select object_path from database_export_objects

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