Oracle 11g 修改表和索引的所屬表空間

修改表空間

查詢owner下 對於表級別的表空間分類
select tablespace_name,count(*) from dba_tables where owner = 'OPERATION_DEVELOP_CNEMC' group by tablespace_name order by 2;

核對上面的數量情況
select * from dba_tables where owner = 'OPERATION_DEVELOP_CNEMC' and tablespace_name = 'USERS';

查看每張表的基本信息
select table_name,num_rows from dba_tables where owner = 'OPERATION_DEVELOP_CNEMC' and tablespace_name = 'USERS' order by 2 desc;

查詢需要move表的詳細信息
select t.table_name as "表名",
       t.num_rows as "表行數",
       nvl(s.partition_name, 0) as "分區名",
       s.segment_type "段類型",
       s.bytes / 1024 / 1024 as "段大小(MB)"
  FROM dba_tables t, dba_segments s
 where t.table_name = s.segment_name(+)
   and t.owner = 'OPERATION_DEVELOP_CNEMC'
   and t.tablespace_name = 'USERS'
   order by s.bytes
   desc;

select count(*) from(
select table_name
  from dba_tables
 where owner = 'OPERATION_DEVELOP_CNEMC'
   and table_name not like 'T\_%' escape '\'
   and table_name not like 'JF\_%' escape '\'
   and table_name not like 'PAYMENT\_%' escape '\'
   and table_name not like 'PROM%'
   and table_name <> 'CUSTOMER_BUY_HIS');

查詢需要move表的索引情況，11g中要考慮move后的索引重建，12c版本中可以支持online move
select index_name,index_type,table_name,table_owner,table_type,uniqueness,status 
from dba_indexes where owner = 'OPERATION_DEVELOP_CNEMC' and tablespace_name = 'USERS';

拼接move的sql語句
SELECT 'alter table '||TABLE_NAME||' move tablespace CNEMC;' FROM DBA_TABLES WHERE TABLESPACE_NAME = 'USERS' and OWNER = 'OPERATION_DEVELOP_CNEMC' order by TABLE_NAME;

拼接重建索引的sql語句（rebuild 跟 rebuid online的區分要注意，online不會阻塞dml語句）
select 'alter index ' ||index_name||' rebuild online tablespace CNEMC;' from dba_indexes where table_owner = 'OPERATION_DEVELOP_CNEMC'
order by index_name
 and status <> 'VALID';
 


1、要考慮move后的索引重建問題
2、盡量放在業務低峰期或者夜間進行
3、對於大表考慮重建索引時占用的cpu跟臨時表空間的問題