0.导入文件很大时需要加一个undo表空间(如果不大,可跳过)
1.这一句是创建一个临时表空间,表空间的名称就是bigdata2temp
CREATE BIGFILE TEMPORARY TABLESPACE bigdata2temp TEMPFILE '/home/yanqilong/Oracle/oradata/orcldb/bigdata2temp.dbf' SIZE 512M AUTOEXTEND ON NEXT 256M MAXSIZE UNLIMITED EXTENT MANAGEMENT LOCAL UNIFORM SIZE 1M;
2.这一句是创建一个表空间,表空间的名称就是bigdata2
CREATE BIGFILE TABLESPACE bigdata2 DATAFILE '/home/yanqilong/Oracle/oradata/orcldb/bigdata2.dbf' SIZE 512M AUTOEXTEND ON NEXT 256M MAXSIZE UNLIMITED LOGGING EXTENT MANAGEMENT LOCAL SEGMENT SPACE MANAGEMENT AUTO;
3.创建用户并指定默认空间和临时表空间
create user BIGDATA2
(用户名) identified by bigdata2 (密码) default tablespace bigdata2 (默认表空间) temporary tablespace bigdata2temp(临时表空间);
4.这个是给 BIGDATA2用户授权会话
GRANT connect,exp_full_database,imp_full_database,resource to BIGDATA2;
5.给用户BIGDATA2授权读写
grant read,write on directory data_dir to BIGDATA2;
6.将导入或导出的文件放在这个目录下
create directory dump_dir as '/mnt/dev_sdc1/Data_Oracle';
7.impdp导入则用该语句:
impdp BIGDATA/mima_test dumpfile=c27-10.dmp logfile=impdp_BIGDATA.log schemas=BIGDATA directory=data_dir
8.imp语句则用该语句,注意:如果出现未知参数则删掉,原因是数据导出时未加
impdp并行导入大文件(100G以上)
impdp BIGDATA1/bigdata1 dumpfile=EXPLTD_%U.DMP logfile=impdp_BIGDATA11.log remap_schema=bigdata:bigdata1 directory=dump_dir parallel=4
imp导入文件
imp system/otacle buffer=409600 feedback=10000 full=y file=/home/Data_Oracle/01.dmp
至此就结束了,以下是常用命令:
9.查询dmp数据的用户名:
head -10 /home/yanqilong/Data_Oracle/dagux262.dmp |strings
10.导入文件很大时需要加一个undo表空间
alter tablespace UNDOTBS1 add datafile '/home/yanqilong/Oracle/oradata/orcldb/undotbs02.dbf' size 1000m autoextend on next 200m
11.删除用户
drop user 用户名 CASCADE;
12.删除表空间
drop tablespace 表空间名 including contents and datafiles;
13.查看表空间
SELECT df.tablespace_name, COUNT (*) datafile_count,
ROUND (SUM (df.BYTES) / 1048576) size_mb,
ROUND (SUM (free.BYTES) / 1048576, 2) free_mb,
ROUND (SUM (df.BYTES) / 1048576 - SUM (free.BYTES) / 1048576, 2 ) used_mb,
ROUND (MAX (free.maxbytes) / 1048576, 2) maxfree,
100 - ROUND (100.0 * SUM (free.BYTES) / SUM (df.BYTES), 2) pct_used,
ROUND (100.0 * SUM (free.BYTES) / SUM (df.BYTES), 2) pct_free
FROM dba_data_files df,
(SELECT tablespace_name, file_id, SUM (BYTES) BYTES, MAX (BYTES) maxbytes FROM dba_free_space GROUP BY tablespace_name, file_id
WHERE
df.tablespace_name = free.tablespace_name(+)
AND df.file_id = free.file_id(+)
GROUP BY df.tablespace_name ORDER BY 8
;