Oracle11g在Windows和Linux下imp导入表,exp导出表,sqluldr2导出表,sqlldr导入表

Windows(Win10)

打开cmd

首先输入sqlplus,依次输入用户名、口令

C:\Users\hasee>sqlplus

SQL*Plus: Release 11.2.0.1.0 Production on 星期三 3月 13 16:55:46 2019

Copyright (c) 1982, 2010, Oracle.  All rights reserved.

请输入用户名:  scott
输入口令:

连接到:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

连接数据库管理员

[oracle@CentOS7One ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on 星期一 3月 18 14:28:40 2019

Copyright (c) 1982, 2009, Oracle.  All rights reserved.

已连接到空闲例程。

1.exp导出表

退出oracle,将scott用户下orcl数据库的buy_cnt_c1表导出到e:/opt/oracle_output/daochu.dmp

C:\Users\hasee>exp scott/tiger@orcl file=e:\opt\\oracle_output\daochu.dmp tables=(buy_cnt_c1)

Export: Release 11.2.0.1.0 - Production on 星期三 3月 13 16:58:30 2019

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.


连接到: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
已导出 ZHS16GBK 字符集和 AL16UTF16 NCHAR 字符集

即将导出指定的表通过常规路径...
. . 正在导出表                      BUY_CNT_C1导出了        8293 行
成功终止导出, 没有出现警告。

8293条数据 22ms

8492033条数据18s65ms

2.imp导入表

导入前要将原来的表删除

drop table buy_cnt_c1;

退出oracle,将e:/opt/oracle_output/daochu.dmp导入到scott用户下orcl数据库

C:\Users\hasee>imp scott/tiger@orcl file=e:\opt\\oracle_output\daochu.dmp

Import: Release 11.2.0.1.0 - Production on 星期三 3月 13 17:03:29 2019

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.


连接到: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

经由常规路径由 EXPORT:V11.02.00 创建的导出文件
已经完成 ZHS16GBK 字符集和 AL16UTF16 NCHAR 字符集中的导入
. 正在将 SCOTT 的对象导入到 SCOTT
. 正在将 SCOTT 的对象导入到 SCOTT
. . 正在导入表                    "BUY_CNT_C1"导入了        8293 行
成功终止导入, 没有出现警告。

8293条数据  18ms

8492033条数据 1m19s8ms

 3.sqluldr2导出表

1.导出表

E:\bigdata\sqluldr2_win_jb51>sqluldr264 scott/tiger@127.0.0.1/orcl query="select * from buy_cnt_c1" head=yes file=e:\opt\oracle_output\tmp001.txt
           0 rows exported at 2019-03-13 17:40:46, size 0 MB.
        8293 rows exported at 2019-03-13 17:40:46, size 0 MB.
         output file e:\opt\oracle_output\tmp001.txt closed at 8293 rows, size 0 MB.

8293条数据  23ms

8492033条数据17s55ms

 

2.指定分隔符

field对字段进行分隔,record对记录进行分隔。

ESCF是escape from,指定哪些形式的数据需要被转义;

ESCAPE是转义前缀

ESCT是escape to,转义成目标字符串

\r=0x0d \n=0x0a |=0x7c ,=0x2c, \t=0x09, :=0x3a, #=0x23, "=0x22 '=0x27

sqluldr264 test/test@127.0.0.1/orcl query="select * from test" head=yes file=e:\opt\oracle_output\hex_test.txt log=e:\opt\oracle_output\hex.log  field=0x7c  record=0x0d ESCF=0x7c0x0d ESCAPE='\' ESCT=i

表信息如下

第一行“|a”字段里含有我们的字段分隔符,用ESCAPE即可替换

第五行含有0x0d,即换行符,不会影响我们的结果,sqluldr会将它看成字符串

Oracle11g在Windows和Linux下imp导入表,exp导出表,sqluldr2导出表,sqlldr导入表_第1张图片

导出结果为

ID|NAME
1|'ia
2|sanq
3|jieba
4|wuren
5|0x0d

 

4.sqlldr导入数据

首先创建表

DROP TABLE "SCOTT"."BUY_CNT_C1";
CREATE TABLE "SCOTT"."BUY_CNT_C1" (
"T_INDEX" NUMBER(19) NULL ,
"INNET_TIME" NUMBER(19) NULL ,
"UP_DATA_AMOUNT_TOTAL" FLOAT(126) NULL ,
"DOWN_DATA_AMOUNT_TOTAL" FLOAT(126) NULL ,
"PAY_CNT" NUMBER(19) NULL ,
"BUY_CNT" NUMBER(19) NULL ,
"MONTH_FEE" FLOAT(126) NULL ,
"CALL_DURATION" NUMBER(19) NULL ,
"AGE_RANGE_ID" FLOAT(126) NULL ,
"DAY_ACT_NUM_MEAN" FLOAT(126) NULL 
)
LOGGING
NOCOMPRESS
NOCACHE

;

编写ctl文件

tmp_002.ctl

load data

infile *

into table BUY_CNT_TEST     

(

"T_INDEX" char terminated  by   ',',
"INNET_TIME" char terminated   by   ',',
"UP_DATA_AMOUNT_TOTAL" char terminated   by   ',',
"DOWN_DATA_AMOUNT_TOTAL" char terminated   by   ',',
"PAY_CNT" char terminated   by   ',',
"BUY_CNT"  char terminated   by   ',',
"MONTH_FEE" char terminated   by   ',',
"CALL_DURATION"  char terminated   by   ',',
"AGE_RANGE_ID" char terminated   by   ',',
"DAY_ACT_NUM_MEAN" char terminated   by   ','
)

cmd输入

E:\bigdata\sqluldr2_win_jb51>sqlldr userid=scott/tiger control=e:/opt/oracle_ctl/tmp002.ctl log=e:/opt/oracle_ctl/tmp001.log data=e:/opt/oracle_ctl/tmp001.csv rows=64

SQL*Loader: Release 11.2.0.1.0 - Production on 星期四 3月 14 10:50:46 2019

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

达到提交点 - 逻辑记录计数 64
达到提交点 - 逻辑记录计数 128
达到提交点 - 逻辑记录计数 192
达到提交点 - 逻辑记录计数 256

...
达到提交点 - 逻辑记录计数 8192 达到提交点 - 逻辑记录计数 8256 达到提交点 - 逻辑记录计数 8294

8294条数据 28ms

8492033条数据 2m6s12ms

Linux(CentOS7)

1.exp导出表

[oracle@CentOS7One ~]$ exp scott/tiger file=output/daochu.dmp tables='(buy_cnt_c1)' log=output/log/daochudmp.log

Export: Release 11.2.0.1.0 - Production on 星期三 3月 20 09:12:08 2019

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.


连接到: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
已导出 AL32UTF8 字符集和 AL16UTF16 NCHAR 字符集
服务器使用 ZHS16GBK 字符集 (可能的字符集转换)

即将导出指定的表通过常规路径...
. . 正在导出表                      BUY_CNT_C1导出了     8492032 行
成功终止导出, 没有出现警告。

8293条数据 2s

8492033条数据60s

2.imp导入表

导入前要将原来的表删除

drop table buy_cnt_c1;
[oracle@CentOS7One ~]$ imp scott/tiger@orcl11g file=input/daoru.cmp 

Import: Release 11.2.0.1.0 - Production on 星期三 3月 20 10:42:51 2019

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.


连接到: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

经由常规路径由 EXPORT:V11.02.00 创建的导出文件
已经完成 AL32UTF8 字符集和 AL16UTF16 NCHAR 字符集中的导入
导入服务器使用 ZHS16GBK 字符集 (可能的字符集转换)
. 正在将 SCOTT 的对象导入到 SCOTT
. 正在将 SCOTT 的对象导入到 SCOTT
. . 正在导入表                    "BUY_CNT_C1"导入了     8492032 行
成功终止导入, 没有出现警告。

8293条数据 48ms

8492032条数据61s

3.sqluldr2导出数据

sqluldr2_linux64_10204.bin user=scott/tiger@orcl11g query="select * from buy_cnt_c1" head=yes file=output/tmp002.csv log=output/log/tmp002.log

8293条数据 小于1s

8492032条数据 5min17s

4.sqlldr导入数据

ctl文件同上,先创建表

[oracle@CentOS7One ~]$ sqlldr userid=scott/tiger control=input/tmp002.ctl log=input/log/tmp002.log data=input/tmp001.csv rows=64

SQL*Loader: Release 11.2.0.1.0 - Production on 星期二 3月 19 16:46:56 2019

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

达到提交点 - 逻辑记录计数 64
达到提交点 - 逻辑记录计数 128
达到提交点 - 逻辑记录计数 192
达到提交点 - 逻辑记录计数 256
达到提交点 - 逻辑记录计数 320
...
达到提交点 - 逻辑记录计数 8192
达到提交点 - 逻辑记录计数 8256
达到提交点 - 逻辑记录计数 8294

8294条数据  47ms

8492033数据  5m27s26ms

 

测试

编写测试脚本,统计脚本命令执行时间

Windows脚本如下

@echo off
set /a startMS=%time:~9,2%
set /a startS=%time:~6,2%
set /a startM=%time:~3,2%
echo %time%

::写你的命令

set /a endMS=%time:~9,2%
set /a endS=%time:~6,2%
set /a endM=%time:~3,2%
echo %time%
set /a diffMS_=%endMS%-%startMS%
set /a diffS_=%endS%-%startS%
set /a diffM_=%endM%-%startM%
echo cost:%diffM_% %diffS_% %diffMS_%
pause

 

Linux脚本如下

start_time=`date --date='0 days ago' "+%Y-%m-%d %H:%M:%S"`
#this is your shell script

#写你的命令

############## finish_time=`date --date='0 days ago' "+%Y-%m-%d %H:%M:%S"` duration=$(($(($(date +%s -d "$finish_time")-$(date +%s -d "$start_time"))))) echo "this shell script execution duration: $duration"

 

CentOS7部署在虚拟机上,所以配置较Windows差很多

8294条数据(小数据量)

 8492033条数据(大数据量)

业务实操1

中移动3300万数据的csv(6.03GB)使用sqlldr导入到oracle数据库

表宽61列,建表语句如下,字段长度建议设置255以上

create table T_CJYX_DZXX
(
  id               VARCHAR2(50),
  version          VARCHAR2(15),
  metacategory     VARCHAR2(100),
  indicator        VARCHAR2(20),
  iscity           VARCHAR2(20),
  parentid         VARCHAR2(24),
  name             VARCHAR2(255),
  code             VARCHAR2(255),
  nameabbrpy       VARCHAR2(255),
  hierarchy        VARCHAR2(20),
  alias            VARCHAR2(255),
  alias2           VARCHAR2(255),
  alias3           VARCHAR2(255),
  alias4           VARCHAR2(255),
  postcode         VARCHAR2(255),
  cover            VARCHAR2(25),
  longitude        VARCHAR2(50),
  latitude         VARCHAR2(26),
  rgt              VARCHAR2(20),
  lft              VARCHAR2(20),
  status           VARCHAR2(25),
  comments         VARCHAR2(255),
  detailaddress    VARCHAR2(255),
  logdate          VARCHAR2(50),
  areaid           VARCHAR2(28),
  isdefine         VARCHAR2(22),
  faultstatus      VARCHAR2(25),
  restoretime      VARCHAR2(50),
  faultdescription VARCHAR2(2555),
  deviceusage      VARCHAR2(25),
  faultdetailcode  VARCHAR2(20),
  floortype        VARCHAR2(25),
  faultcount       VARCHAR2(20),
  createdate       VARCHAR2(50),
  auditdate        VARCHAR2(50),
  createuser       VARCHAR2(255),
  audituser        VARCHAR2(255),
  addresstype      VARCHAR2(25),
  marketgrade      VARCHAR2(25),
  iscoordinate     VARCHAR2(20),
  ttmigrate        VARCHAR2(25),
  gjgx             VARCHAR2(25),
  accesstype       VARCHAR2(25),
  shape            VARCHAR2(128),
  fillcolor        VARCHAR2(255),
  fillwidth        VARCHAR2(22),
  fillalpha        VARCHAR2(21),
  fillstyle        VARCHAR2(255),
  fillbordercolor  VARCHAR2(255),
  area             VARCHAR2(23),
  areaunit         VARCHAR2(22),
  createuserphone  VARCHAR2(255),
  modifyuser       VARCHAR2(255),
  modifydate       VARCHAR2(50),
  gcstatus         VARCHAR2(25),
  pmsprjcode       VARCHAR2(255),
  pmsprjname       VARCHAR2(255),
  deleteuser       VARCHAR2(255),
  deletedate       VARCHAR2(50),
  afterdeleteuser  VARCHAR2(255),
  afterdeletedate  VARCHAR2(50)
)
tablespace TBS_AHJZH_DATA
  pctfree 10
  initrans 1
  maxtrans 255
  storage
  (
    initial 64
    next 8
    minextents 1
    maxextents unlimited
  );

ctl文件如下

LOAD DATA 
INFILE * 
INTO TABLE T_CJYX_DZXX 
 REPLACE 
FIELDS TERMINATED BY '$' TRAILING NULLCOLS
(
  id,               
  version,          
  metacategory,    
  indicator,        
  iscity,           
  parentid,         
  name,             
  code,             
  nameabbrpy,       
  hierarchy,        
  alias,            
  alias2,           
  alias3,
  alias4,           
  postcode,         
  cover,            
  longitude,        
  latitude,         
  rgt,              
  lft,              
  status,           
  comments,         
  detailaddress,    
  logdate,          
  areaid,           
  isdefine,         
  faultstatus,      
  restoretime,      
  faultdescription,
  deviceusage,      
  faultdetailcode,  
  floortype,        
  faultcount,       
  createdate,       
  auditdate,        
  createuser,       
  audituser,        
  addresstype,      
  marketgrade,      
  iscoordinate,     
  ttmigrate,        
  gjgx,             
  accesstype,       
  shape,            
  fillcolor,        
  fillwidth,        
  fillalpha,        
  fillstyle,        
  fillbordercolor,  
  area,             
  areaunit,         
  createuserphone,  
  modifyuser,       
  modifydate,       
  gcstatus,         
  pmsprjcode,       
  pmsprjname,       
  deleteuser,       
  deletedate,       
  afterdeleteuser,  
  afterdeletedate
 ) 

 

运行日志如下,耗时约14小时

SQL*Loader: Release 11.2.0.1.0 - Production on 星期三 4月 3 08:46:55 2019

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

控制文件:      E:\opt\srcbigdata\di_70002_20190325.ctl
数据文件:      E:\opt\srcbigdata\di_70002_20190325.csv
  错误文件:    E:\opt\srcbigdata\di_70002_20190325.bad
  废弃文件:    未作指定
 
(可废弃所有记录)

要加载的数: ALL
要跳过的数: 0
允许的错误: 50
绑定数组: 64 行, 最大 256000 字节
继续:    未作指定
所用路径:       常规

表 T_CJYX_DZXX,已加载从每个逻辑记录
插入选项对此表 REPLACE 生效
TRAILING NULLCOLS 选项生效

   列名                        位置      长度  中止 包装数据类型
------------------------------ ---------- ----- ---- ---- ---------------------
ID                                  FIRST     *   $       CHARACTER            
VERSION                              NEXT     *   $       CHARACTER            
METACATEGORY                         NEXT     *   $       CHARACTER            
INDICATOR                            NEXT     *   $       CHARACTER            
ISCITY                               NEXT     *   $       CHARACTER            
PARENTID                             NEXT     *   $       CHARACTER            
NAME                                 NEXT     *   $       CHARACTER            
CODE                                 NEXT     *   $       CHARACTER            
NAMEABBRPY                           NEXT     *   $       CHARACTER            
HIERARCHY                            NEXT     *   $       CHARACTER            
ALIAS                                NEXT     *   $       CHARACTER            
ALIAS2                               NEXT     *   $       CHARACTER            
ALIAS3                               NEXT     *   $       CHARACTER            
ALIAS4                               NEXT     *   $       CHARACTER            
POSTCODE                             NEXT     *   $       CHARACTER            
COVER                                NEXT     *   $       CHARACTER            
LONGITUDE                            NEXT     *   $       CHARACTER            
LATITUDE                             NEXT     *   $       CHARACTER            
RGT                                  NEXT     *   $       CHARACTER            
LFT                                  NEXT     *   $       CHARACTER            
STATUS                               NEXT     *   $       CHARACTER            
COMMENTS                             NEXT     *   $       CHARACTER            
DETAILADDRESS                        NEXT     *   $       CHARACTER            
LOGDATE                              NEXT     *   $       CHARACTER            
AREAID                               NEXT     *   $       CHARACTER            
ISDEFINE                             NEXT     *   $       CHARACTER            
FAULTSTATUS                          NEXT     *   $       CHARACTER            
RESTORETIME                          NEXT     *   $       CHARACTER            
FAULTDESCRIPTION                     NEXT     *   $       CHARACTER            
DEVICEUSAGE                          NEXT     *   $       CHARACTER            
FAULTDETAILCODE                      NEXT     *   $       CHARACTER            
FLOORTYPE                            NEXT     *   $       CHARACTER            
FAULTCOUNT                           NEXT     *   $       CHARACTER            
CREATEDATE                           NEXT     *   $       CHARACTER            
AUDITDATE                            NEXT     *   $       CHARACTER            
CREATEUSER                           NEXT     *   $       CHARACTER            
AUDITUSER                            NEXT     *   $       CHARACTER            
ADDRESSTYPE                          NEXT     *   $       CHARACTER            
MARKETGRADE                          NEXT     *   $       CHARACTER            
ISCOORDINATE                         NEXT     *   $       CHARACTER            
TTMIGRATE                            NEXT     *   $       CHARACTER            
GJGX                                 NEXT     *   $       CHARACTER            
ACCESSTYPE                           NEXT     *   $       CHARACTER            
SHAPE                                NEXT     *   $       CHARACTER            
FILLCOLOR                            NEXT     *   $       CHARACTER            
FILLWIDTH                            NEXT     *   $       CHARACTER            
FILLALPHA                            NEXT     *   $       CHARACTER            
FILLSTYLE                            NEXT     *   $       CHARACTER            
FILLBORDERCOLOR                      NEXT     *   $       CHARACTER            
AREA                                 NEXT     *   $       CHARACTER            
AREAUNIT                             NEXT     *   $       CHARACTER            
CREATEUSERPHONE                      NEXT     *   $       CHARACTER            
MODIFYUSER                           NEXT     *   $       CHARACTER            
MODIFYDATE                           NEXT     *   $       CHARACTER            
GCSTATUS                             NEXT     *   $       CHARACTER            
PMSPRJCODE                           NEXT     *   $       CHARACTER            
PMSPRJNAME                           NEXT     *   $       CHARACTER            
DELETEUSER                           NEXT     *   $       CHARACTER            
DELETEDATE                           NEXT     *   $       CHARACTER            
AFTERDELETEUSER                      NEXT     *   $       CHARACTER            
AFTERDELETEDATE                      NEXT     *   $       CHARACTER            

ROWS 参数所用的值已从 64 更改为 16

表 T_CJYX_DZXX:
  33543432 行 加载成功。
  由于数据错误, 0 行 没有加载。
  由于所有 WHEN 子句失败, 0 行 没有加载。
  由于所有字段都为空的, 0 行 没有加载。


为绑定数组分配的空间:                251808 字节 (16 行)
读取   缓冲区字节数: 1048576

跳过的逻辑记录总数:          0
读取的逻辑记录总数:      33543432
拒绝的逻辑记录总数:          0
废弃的逻辑记录总数:        0

从 星期三 4月  03 08:46:55 2019 开始运行
在 星期三 4月  03 22:48:09 2019 处运行结束

经过时间为: 14: 01: 14.33
CPU 时间为: 00: 18: 19.89

业务实操2

建表语句

create table T_CJYX_HOMECOUNT_BACKUP
(
  acyc_id          VARCHAR2(50),
  address_id       VARCHAR2(50),
  address_name     VARCHAR2(200),
  address_level    VARCHAR2(50),
  check_type       VARCHAR2(50),
  check_target_num VARCHAR2(50),
  check_value      VARCHAR2(50),
  target_phone     VARCHAR2(4000),
  notarget_phone   VARCHAR2(4000),
  parent_id        VARCHAR2(50),
  bcyc_id          VARCHAR2(50)
)

 

从服务器导入16G数据,表宽十一列,一亿八千万条记录

控制文件di_00121_20190427.ctl如下

LOAD DATA 
INFILE * 
INTO TABLE T_CJYX_HOMECOUNT_BACKUP
 REPLACE 
FIELDS TERMINATED BY '$' TRAILING NULLCOLS
(
  acyc_id CHAR(40000),
  address_id CHAR(40000),
  address_name CHAR(40000),
  address_level CHAR(40000),
  check_type CHAR(40000),
  check_target_num CHAR(40000),
  check_value CHAR(40000),
  target_phone CHAR(40000),
  notarget_phone CHAR(40000),
  parent_id CHAR(40000),
  bcyc_id CHAR(40000)         
 ) 

运行脚本

这种模式导入速度非常慢,十五小时只能导入三千万条,但是此方案安全稳定

sqlldr userid=username/password@//10.243.5.16:1521/itgrept control=E:\opt\srcbigdata2\di_00121_20190427.ctl log=E:\opt\srcbigdata2\di_00121_20190427.log  data=E:\opt\srcbigdata2\di_00121_20190427.dat

参数调优后的脚本,十五小时可以导入一亿条数据

sqlldr userid=username/password@//10.243.5.16:1521/itgrept control=E:\opt\srcbigdata2\di_00121_20190427.ctl log=E:\opt\srcbigdata2\di_00121_20190427_gbk.log  data=E:\opt\srcbigdata2\di_00121_20190427_gbk.dat rows=10000 readsize=20680000 bindsize=20680000

最佳性能的情况下,

报错ORA-03113:通信通道的文件结尾
原因:sqlORA-03113 连接到数据库的网络中断
1.SYSTEM中审计表aud$在数据库编程过程中,对SQL语句的编译过程,资源占用会较大
2.SYSAUX则进行的是AWR快照,也会进行占用较多的空间
解决方案:以sysdba的身份清除审计表,最好的方法是弄一个本地表空间进行导入

报错:
SQL*Loader-604:  试图提交时出错
ORA-03135: 连接失去联系

 

实际上脚本运行中途会因为各种原因中断,使用append方式向表追加

di_00121_20190427_append.ctl如下

LOAD DATA 
INFILE * 
INTO TABLE T_CJYX_HOMECOUNT_BACKUP
 APPEND 
FIELDS TERMINATED BY '$' TRAILING NULLCOLS
(
  acyc_id CHAR(40000),
  address_id CHAR(40000),
  address_name CHAR(40000),
  address_level CHAR(40000),
  check_type CHAR(40000),
  check_target_num CHAR(40000),
  check_value CHAR(40000),
  target_phone CHAR(40000),
  notarget_phone CHAR(40000),
  parent_id CHAR(40000),
  bcyc_id CHAR(40000)         
 ) 

在108238266行中断

从108238266行继续导入

运行脚本如下

sqlldr userid=username/password@//10.243.5.16:1521/itgrept control=E:\opt\srcbigdata2\di_00121_20190427_append.ctl log=E:\opt\srcbigdata2\di_00121_20190427_gbk_append.log  data=E:\opt\srcbigdata2\di_00121_20190427_gbk.dat rows=100 readsize=20680000 bindsize=20680000 skip=108238266

耗时大约四十一小时

总结

exp导出和imp导入的效率要大于sqluldr2和sqlldr;

小数据量体现不出来exp和imp的优势,效率和sqluldr2和sqlldr差不多;

大数据量exp和imp明显优于sqluldr2和sqlldr;

硬件配置高会提高导入导出效率;

不同数据库迁移建议使用sqluldr2和sqlldr,支持csv,txt等数据格式的导入导出;

 

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