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1.准备工作
首先得准备两个能够PING通，并且装了Oracle软件且已经建库的Linux虚拟机。操作系统不限，至少有一个虚拟机已经建好库，最好两个都建好相同SID的库，这样少很多创建目录的麻烦，这里库的SID都是orcl，Linux严格区分大小写，所以SID的大小写得注意。
我这里有两个名为PD和ST的Linux虚拟机。
PD:192.168.56.5（主库）
ST:192.168.56.6（备库）
2.在主库做一些操作
2.1强制force logging
SQL> shutdown immediate Database closed. Database dismounted. ORACLE instance shut down. SQL> startup mount ORACLE instance started. Total System Global Area 1653518336 bytes Fixed Size 2253784 bytes Variable Size 1006636072 bytes Database Buffers 637534208 bytes Redo Buffers 7094272 bytes Database mounted. SQL> alter database force logging; --修改数据库为强制记日志，这是必须的操作，主库的每一步操作都得记录到日志中去。 Database altered.
2.2开启主库的归档模式
SQL> alter database archivelog; --修改数据库为归档模式，因为dg是通过传送归档日志到备库然后应用来保证主备库一致的。 Database altered.
2.3创建standby redo log
SQL> ALTER DATABASE ADD STANDBY LOGFILE GROUP 4 ('/u01/app/oracle/oradata/orcl/redo04.log') size 50M;
Database altered.
SQL> ALTER DATABASE ADD STANDBY LOGFILE GROUP 5 ('/u01/app/oracle/oradata/orcl/redo05.log') size 50M;
Database altered.
SQL> ALTER DATABASE ADD STANDBY LOGFILE GROUP 6 ('/u01/app/oracle/oradata/orcl/redo06.log') size 50M;
Database altered.
SQL> ALTER DATABASE ADD STANDBY LOGFILE GROUP 7 ('/u01/app/oracle/oradata/orcl/redo07.log') size 50M;
Database altered
SQL> select group#,type,member from v$logfile;
GROUP# TYPE MEMBER
---------- ------- --------------------------------------------------
3 ONLINE /u01/app/oracle/oradata/orcl/redo03.log
2 ONLINE /u01/app/oracle/oradata/orcl/redo02.log
1 ONLINE /u01/app/oracle/oradata/orcl/redo01.log
4 STANDBY /u01/app/oracle/oradata/orcl/redo04.log
5 STANDBY /u01/app/oracle/oradata/orcl/redo05.log
6 STANDBY /u01/app/oracle/oradata/orcl/redo06.log
7 STANDBY /u01/app/oracle/oradata/orcl/redo07.log
2.4创建pfile
SQL> create pfile from spfile;--这里创建pfile是为了做一些主库参数的配置，并且还得拷贝到备库再次修改成备库的配置。 File created. SQL> shutdown immediate Database closed. Database dismounted. ORACLE instance shut down.
2.5创建主库归档目录
[oracle@PD orcl]$ mkdir archivelog --建立这个目录是为了存放主库的归档日志文件，并且这个目录会和其他数据文件等等一起拷贝到备库。 [oracle@PD orcl]$ cd archivelog/ [oracle@PD archivelog]$ ls [oracle@PD archivelog]$ pwd /u01/app/oracle/oradata/orcl/archivelog
2.6在主备库同时创建静态监听listener和tnsname
建议用net manager建立
主库orcl_pd:192.168.56.5
[oracle@PD admin]$ cat listener.ora # listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora # Generated by Oracle configuration tools. SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (GLOBAL_DBNAME = orcl) (ORACLE_HOME = /u01/app/oracle/product/11.2.0/dbhome_1) (SID_NAME = orcl) ) ) LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521)) ) (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)) ) ) ADR_BASE_LISTENER = /u01/app/oracle [oracle@PD admin]$ cat tnsnames.ora # tnsnames.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora # Generated by Oracle configuration tools. ORCL_ST = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.6)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = orcl) ) ) ORCL = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)) ) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl) ) ) ORCL_PD = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.5)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = orcl) ) ) [oracle@PD orcl]$ lsnrctl LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 22-SEP-2016 16:41:15 Copyright (c) 1991, 2013, Oracle. All rights reserved. Welcome to LSNRCTL, type "help" for information. LSNRCTL> status Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521))) TNS-12541: TNS:no listener TNS-12560: TNS:protocol adapter error TNS-00511: No listener Linux Error: 111: Connection refused Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521))) TNS-12541: TNS:no listener TNS-12560: TNS:protocol adapter error TNS-00511: No listener Linux Error: 111: Connection refused LSNRCTL> start Starting /u01/app/oracle/product/11.2.0/dbhome_1/bin/tnslsnr: please wait... TNSLSNR for Linux: Version 11.2.0.4.0 - Production System parameter file is /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora Log messages written to /u01/app/oracle/diag/tnslsnr/PD/listener/alert/log.xml Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=PD)(PORT=1521))) Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production Start Date 22-SEP-2016 16:39:15 Uptime 0 days 0 hr. 0 min. 0 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora Listener Log File /u01/app/oracle/diag/tnslsnr/PD/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=PD)(PORT=1521))) Services Summary... Service "orcl" has 1 instance(s). Instance "orcl", status UNKNOWN, has 1 handler(s) for this service... The command completed successfully LSNRCTL> exit
备库orcl_pd:192.168.56.6
[oracle@ST admin]$ cat listener.ora # listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora # Generated by Oracle configuration tools. SID_LIST_LISTENER = (SID_LIST = (SID_DESC = (GLOBAL_DBNAME = orcl) (ORACLE_HOME = /u01/app/oracle/product/11.2.0/dbhome_1) (SID_NAME = orcl) ) ) LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521)) ) (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)) ) ) ADR_BASE_LISTENER = /u01/app/oracle [oracle@ST admin]$ cat tnsnames.ora # tnsnames.ora Network Configuration File: /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/tnsnames.ora # Generated by Oracle configuration tools. ORCL_ST = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.6)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = orcl) ) ) ORCL = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521)) ) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl) ) ) ORCL_PD = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.56.5)(PORT = 1521)) ) (CONNECT_DATA = (SERVICE_NAME = orcl) ) ) [oracle@ST dbs]$ lsnrctl LSNRCTL for Linux: Version 11.2.0.4.0 - Production on 22-SEP-2016 16:39:20 Copyright (c) 1991, 2013, Oracle. All rights reserved. Welcome to LSNRCTL, type "help" for information. LSNRCTL> status Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521))) TNS-12541: TNS:no listener TNS-12560: TNS:protocol adapter error TNS-00511: No listener Linux Error: 2: No such file or directory Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=localhost)(PORT=1521))) TNS-12541: TNS:no listener TNS-12560: TNS:protocol adapter error TNS-00511: No listener Linux Error: 111: Connection refused LSNRCTL> start Starting /u01/app/oracle/product/11.2.0/dbhome_1/bin/tnslsnr: please wait... TNSLSNR for Linux: Version 11.2.0.4.0 - Production System parameter file is /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora Log messages written to /u01/app/oracle/diag/tnslsnr/ST/listener/alert/log.xml Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ST)(PORT=1521))) Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521))) STATUS of the LISTENER ------------------------ Alias LISTENER Version TNSLSNR for Linux: Version 11.2.0.4.0 - Production Start Date 22-SEP-2016 17:39:02 Uptime 0 days 0 hr. 0 min. 0 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File /u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener.ora Listener Log File /u01/app/oracle/diag/tnslsnr/ST/listener/alert/log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ST)(PORT=1521))) Services Summary... Service "orcl" has 1 instance(s). Instance "orcl", status UNKNOWN, has 1 handler(s) for this service... The command completed successfully
2.7修改主库pfile文件
[oracle@PD dbs]$ vi initorcl.ora
orcl.__db_cache_size=637534208
orcl.__java_pool_size=16777216
orcl.__large_pool_size=83886080
orcl.__oracle_base='/u01/app/oracle'#ORACLE_BASE set from environment
orcl.__pga_aggregate_target=671088640
orcl.__sga_target=989855744
orcl.__shared_io_pool_size=0
orcl.__shared_pool_size=234881024
orcl.__streams_pool_size=0
*.audit_file_dest='/u01/app/oracle/admin/orcl/adump'
*.audit_trail='db'
*.compatible='11.2.0.4.0'
*.control_files='/u01/app/oracle/oradata/orcl/control01.ctl','/u01/app/oracle/fast_recovery_area/orcl/control02.ctl'
*.db_block_size=8192
*.db_domain=''
*.db_name='orcl'
*.db_recovery_file_dest='/u01/app/oracle/fast_recovery_area'
*.db_recovery_file_dest_size=4385144832
*.diagnostic_dest='/u01/app/oracle'
*.dispatchers='(PROTOCOL=TCP) (SERVICE=orclXDB)'
*.memory_target=1657798656
*.open_cursors=300
*.processes=150
*.remote_login_passwordfile='EXCLUSIVE'
*.undo_tablespace='UNDOTBS1'
--下面这个是为了搭建DG添加的配置参数，主备库是有区分的，请注意
DB_UNIQUE_NAME=orcl_pd
LOG_ARCHIVE_CONFIG='DG_CONFIG=(orcl_pd,orcl_st)'
LOG_ARCHIVE_DEST_1=
'LOCATION=/u01/app/oracle/oradata/orcl/archivelog
VALID_FOR=(ALL_LOGFILES,ALL_ROLES)
DB_UNIQUE_NAME=orcl_pd'
LOG_ARCHIVE_DEST_2=
'SERVICE=orcl_st ASYNC
VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE)
DB_UNIQUE_NAME=orcl_st'
LOG_ARCHIVE_DEST_STATE_1=ENABLE
LOG_ARCHIVE_DEST_STATE_2=ENABLE
REMOTE_LOGIN_PASSWORDFILE=EXCLUSIVE
LOG_ARCHIVE_FORMAT=%t_%s_%r.arc
FAL_SERVER=orcl_st
STANDBY_FILE_MANAGEMENT=AUTO
2.8用pfile启动主库，并创建spfile
SQL> shutdown immediate
ORA-01109: database not open
Database dismounted.
ORACLE instance shut down.
SQL> startup nomount pfile='/u01/app/oracle/product/11.2.0/dbhome_1/dbs/initorcl.ora'
ORACLE instance started.
Total System Global Area 1653518336 bytes
Fixed Size 2253784 bytes
Variable Size 1006636072 bytes
Database Buffers 637534208 bytes
Redo Buffers 7094272 bytes
SQL> create spfile from pfile;
File created.
2.9创建主备库的备份目录
主库
[oracle@PD orcl]$ mkdir /u01/app/oracle/oradata/orcl/backup
备库
[oracle@PD orcl]$ mkdir /u01/app/oracle/oradata/orcl/backup
2.10将口令验证文件和pfile发送到备库
[oracle@PD dbs]$ pwd
/u01/app/oracle/product/11.2.0/dbhome_1/dbs
[oracle@PD dbs]$ scp orapworcl 192.168.56.6:/u01/app/oracle/product/11.2.0/dbhome_1/dbs/
oracle@192.168.56.6's password:
orapworcl
[oracle@PD dbs]$ scp initorcl.ora 192.168.56.6:/u01/app/oracle/product/11.2.0/dbhome_1/dbs/
oracle@192.168.56.6's password:
initorcl.ora
3.在主库做一些操作
3.1在备库修改从主库拷贝来的pfile
[oracle@ST dbs]$ cat initorcl.ora orcl.__db_cache_size=637534208 orcl.__java_pool_size=16777216 orcl.__large_pool_size=83886080 orcl.__oracle_base='/u01/app/oracle'#ORACLE_BASE set from environment orcl.__pga_aggregate_target=671088640 orcl.__sga_target=989855744 orcl.__shared_io_pool_size=0 orcl.__shared_pool_size=234881024 orcl.__streams_pool_size=0 *.audit_file_dest='/u01/app/oracle/admin/orcl/adump' *.audit_trail='db' *.compatible='11.2.0.4.0' *.control_files='/u01/app/oracle/oradata/orcl/control01.ctl','/u01/app/oracle/fast_recovery_area/orcl/control02.ctl' *.db_block_size=8192 *.db_domain='' *.db_name='orcl' *.db_recovery_file_dest='/u01/app/oracle/fast_recovery_area' *.db_recovery_file_dest_size=4385144832 *.diagnostic_dest='/u01/app/oracle' *.dispatchers='(PROTOCOL=TCP) (SERVICE=orclXDB)' *.memory_target=1657798656 *.open_cursors=300 *.processes=150 *.remote_login_passwordfile='EXCLUSIVE' *.undo_tablespace='UNDOTBS1' DB_UNIQUE_NAME=orcl_st LOG_ARCHIVE_CONFIG='DG_CONFIG=(orcl_pd,orcl_st)' LOG_ARCHIVE_DEST_1= 'LOCATION=/u01/app/oracle/oradata/orcl/archivelog VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=orcl_st' LOG_ARCHIVE_DEST_2= 'SERVICE=orcl_pd ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=orcl_pd' LOG_ARCHIVE_DEST_STATE_1=ENABLE LOG_ARCHIVE_DEST_STATE_2=ENABLE REMOTE_LOGIN_PASSWORDFILE=EXCLUSIVE LOG_ARCHIVE_FORMAT=%t_%s_%r.arc FAL_SERVER=orcl_pd STANDBY_FILE_MANAGEMENT=AUTO
3.2启动备库到nomount状态
[oracle@localhost backup]$ sqlplus / as sysdba SQL*Plus: Release 11.2.0.4.0 Production on Thu Sep 22 15:43:36 2016 Copyright (c) 1982, 2013, Oracle. All rights reserved. Connected to an idle instance. SQL> startup nomount ORACLE instance started. Total System Global Area 1586708480 bytes Fixed Size 2253624 bytes Variable Size 973081800 bytes Database Buffers 603979776 bytes Redo Buffers 7393280 bytes
3.3开始使用RMAN进行ADG
[oracle@localhost orcl]$ rman target sys/sys@orcl_pd auxiliary sys/sys@orcl_st
Recovery Manager: Release 11.2.0.4.0 - Production on Thu Sep 22 16:45:55 2016
Copyright (c) 1982, 2011, Oracle and/or its affiliates. All rights reserved.
connected to target database: ORCL (DBID=1451007763)
connected to auxiliary database: ORCL (not mounted)
RMAN> duplicate target database for standby from active database nofilenamecheck;
Starting Duplicate Db at 22-SEP-16
using target database control file instead of recovery catalog
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: SID=19 device type=DISK
contents of Memory Script:
{
backup as copy reuse
targetfile '/u01/app/oracle/product/11.2.0/dbhome_1/dbs/orapworcl' auxiliary format
'/u01/app/oracle/product/11.2.0/dbhome_1/dbs/orapworcl' ;
}
executing Memory Script
Starting backup at 22-SEP-16
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=42 device type=DISK
Finished backup at 22-SEP-16
contents of Memory Script:
{
backup as copy current controlfile for standby auxiliary format '/u01/app/oracle/oradata/orcl/control01.ctl'
restore clone controlfile to '/u01/app/oracle/fast_recovery_area/orcl/control02.ctl' from
'/u01/app/oracle/oradata/orcl/control01.ctl';
}
executing Memory Script
Starting backup at 22-SEP-16
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
copying standby control file
output file name=/u01/app/oracle/product/11.2.0/dbhome_1/dbs/snapcf_orcl.f tag=TAG20160922T164651 RECID=3 STAMP=
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:08
Finished backup at 22-SEP-16
Starting restore at 22-SEP-16
using channel ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: copied control file copy
Finished restore at 22-SEP-16
contents of Memory Script:
{
sql clone 'alter database mount standby database';
}
executing Memory Script
sql statement: alter database mount standby database
contents of Memory Script:
{
set newname for tempfile 1 to
"/u01/app/oracle/oradata/orcl/temp01.dbf";
switch clone tempfile all;
set newname for datafile 1 to
"/u01/app/oracle/oradata/orcl/system01.dbf";
set newname for datafile 2 to
"/u01/app/oracle/oradata/orcl/sysaux01.dbf";
set newname for datafile 3 to
"/u01/app/oracle/oradata/orcl/undotbs01.dbf";
set newname for datafile 4 to
"/u01/app/oracle/oradata/orcl/users01.dbf";
backup as copy reuse
datafile 1 auxiliary format
"/u01/app/oracle/oradata/orcl/system01.dbf" datafile
2 auxiliary format
"/u01/app/oracle/oradata/orcl/sysaux01.dbf" datafile
3 auxiliary format
"/u01/app/oracle/oradata/orcl/undotbs01.dbf" datafile
4 auxiliary format
"/u01/app/oracle/oradata/orcl/users01.dbf" ;
sql 'alter system archive log current';
}
executing Memory Script
executing command: SET NEWNAME
renamed tempfile 1 to /u01/app/oracle/oradata/orcl/temp01.dbf in control file
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
executing command: SET NEWNAME
Starting backup at 22-SEP-16
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
input datafile file number=00001 name=/u01/app/oracle/oradata/orcl/system01.dbf
output file name=/u01/app/oracle/oradata/orcl/system01.dbf tag=TAG20160922T164708
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:01:05
channel ORA_DISK_1: starting datafile copy
input datafile file number=00002 name=/u01/app/oracle/oradata/orcl/sysaux01.dbf
output file name=/u01/app/oracle/oradata/orcl/sysaux01.dbf tag=TAG20160922T164708
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:45
channel ORA_DISK_1: starting datafile copy
input datafile file number=00003 name=/u01/app/oracle/oradata/orcl/undotbs01.dbf
output file name=/u01/app/oracle/oradata/orcl/undotbs01.dbf tag=TAG20160922T164708
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:07
channel ORA_DISK_1: starting datafile copy
input datafile file number=00004 name=/u01/app/oracle/oradata/orcl/users01.dbf
output file name=/u01/app/oracle/oradata/orcl/users01.dbf tag=TAG20160922T164708
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:00:03
Finished backup at 22-SEP-16
sql statement: alter system archive log current
contents of Memory Script:
{
switch clone datafile all;
}
executing Memory Script
datafile 1 switched to datafile copy
input datafile copy RECID=3 STAMP=923244552 file name=/u01/app/oracle/oradata/orcl/system01.dbf
datafile 2 switched to datafile copy
input datafile copy RECID=4 STAMP=923244552 file name=/u01/app/oracle/oradata/orcl/sysaux01.dbf
datafile 3 switched to datafile copy
input datafile copy RECID=5 STAMP=923244552 file name=/u01/app/oracle/oradata/orcl/undotbs01.dbf
datafile 4 switched to datafile copy
input datafile copy RECID=6 STAMP=923244552 file name=/u01/app/oracle/oradata/orcl/users01.dbf
Finished Duplicate Db at 22-SEP-16
RMAN> exit
3.3打开备库并开启apply service
[oracle@ST dbs]$ sqlplus / as sysdba SQL*Plus: Release 11.2.0.4.0 Production on on Thu Sep 22 17:50:36 2016 Copyright (c) 1982, 2013, Oracle. All rights reserved. Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production With the Partitioning, OLAP, Data Mining and Real Application Testing options SQL> alter database open; Database altered. SQL> select open_mode from v$database; OPEN_MODE -------------------- READ ONLY SQL> alter database recover managed standby database disconnect from session; Database altered.
4.检验是否成功
主库
SQL> create table Csong(id number(10),name varchar2(20)); Table created. SQL> insert into Csong values(1,'Csong'); 1 row created. SQL> insert into Csong values(2,'Lyuanyuan'); 1 row created. SQL> commit; Commit complete. SQL> alter system switch logfile; System altered. SQL>
备库
SQL> desc Csong Name Null? Type ----------------------------------------- -------- ---------------------------- ID NUMBER(10) NAME VARCHAR2(20) SQL> select * from Csong; ID NAME ---------- -------------------- 1 Csong 2 Lyuanyuan
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