oracle常用语句

drop tablespace CRM_ONLINE_SPACE including contents and datafiles  --删除表空间

drop user wuliu01 cascade; --删除用户

exp **/**@orcl file=D:/**.dmp  --导出数据库

imp **/**@orcl file=E:/Alen/Work/****.dmp ignore=y full=y  --导入数据库

EXPDP USERID='**/**@orcl11 as sysdba' schemas=** directory=DATA_PUMP_DIR dumpfile=gytms20130603FOR10G.dmp logfile=20130603.log version=10.2.0.1.0  --11g导成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导入

CREATE TABLESPACE CRM_ONLINE_SPACE 

LOGGING

DATAFILE  'E:\oracle\product\10.2.0\oradata\orcl\CRM_ONLINE_SPACE1.dbf'

SIZE 2048M

AUTOEXTEND ON

NEXT 5M 

EXTENT MANAGEMENT LOCAL; --创建表空间 10G

Create tablespace StartBreak

  datafile 'D:\orcl11g\app\Administrator\oradata\orcl11\StartBreak.dbf'

  size 2048M

  autoextend on

  next 32m 

  extent management local--创建表空间 11G

create user wuliu01 identified by wuliu

default tablespace CRM_ONLINE_SPACE

temporary tablespace wuliu01; --创建用户

grant connect to wuliu01;

grant dba to wuliu01;

grant resource to wuliu01;--给用户授权

--根据约束条件找到指定的表及所对应的列信息

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%'

查看执行过的语句

select * from v$sqltext a

select * from v$sqlarea

查看当前用户下表的占用空间

Select Segment_Name, Sum(bytes)/1024/1024 From User_Extents Group By Segment_Name

查询所有对象占用空间

select owner, segment_name,sum(bytes/1024/1024)   from   dba_segments   

group by owner,segment_name

查询数据库中各对象占用空间大小

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中去除字段中的回车符

update ywj_yxglobj set table_name = replace(table_name,chr(10),'')

where table_name like 'ACCT_INFO%'