drop tablespace crm_online_space including contents and datafiles --刪除表空間
drop user wuliu01 cascade; --刪除使用者
exp **/**@orcl file=d:/**.dmp --匯出資料庫
imp **/**@orcl file=e:/alen/work/****.dmp ignore=y full=y --匯入資料庫
expdp userid='**/**@orcl11 as sysdba' schemas=** directory=data_pump_dir dumpfile=gytms20130603for10g.dmp logfile=20130603.log version=10.2.0.1.0 --11g導成10g
impdp userid='**/**@orcl11 as sysdba' schemas=gytms directory=data_pump_dir dumpfile=gytms20130603for10g.dmp logfile=aa.log version=10.2.0.1.0 --10g匯入
--根據約束條件找到指定的表及所對應的列資訊
select a.constraint_name ,
a.constraint_type,
a.table_name,
b.column_name,
a.search_condition
from user_constraints a,user_cons_columns b
where a.constraint_name=b.constraint_name and a.constraint_name like '%fk3f53657728a16d5a%'
檢視執行過的語句
select * from v$sqltext a
select * from v$sqlarea
檢視當前使用者下表的占用空間
select segment_name, sum(bytes)/1024/1024 from user_extents group by segment_name
查詢所有物件占用空間
select owner, segment_name,sum(bytes/1024/1024) from dba_segments
group by owner,segment_name
查詢資料庫中各物件占用空間大小
select segment_name,b.object_type, sum(bytes)/1024/1024 from user_extents a,user_objects b
where a.segment_name=b.object_name group by segment_name,b.object_type order by object_type, segment_name
oracle中去除欄位中的回車符
update ywj_yxglobj set table_name = replace(table_name,chr(10),'')
where table_name like 'acct_info%'
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