Oracle使用sqluldr2导出数据

sqluldr2是一个基于OCI的文本导出工具，小巧方便，使用方法类似于Oracle自带的exp，支持自定义SQL、本地和客户端的导出，速度快，效率高。

下载地址，最下面有个小工具里面就有

http://www.onexsoft.com/download.html

也可以直接在系统上wget

wget http://www.onexsoft.com/software/sqluldr2linux64.zip

解压之后就是一个bin文件

-rwxrwxrwx 1 oracle oinstall 185894 1月 27 2016 sqluldr2linux64.bin

直接执行就能显示帮助

[oracle@hecomoracleserver2 sqluldr2]$ ./sqluldr2linux64.bin
SQL*UnLoader: Fast Oracle Text Unloader (GZIP, Parallel), Release 4.0.1
(@) Copyright Lou Fangxin (AnySQL.net) 2004 - 2010, all rights reserved.
License: Free for non-commercial useage, else 100 USD per server.
Usage: SQLULDR2 keyword=value [,keyword=value,...]
Valid Keywords:
user = username/password@tnsname
sql = SQL file name
query = select statement
field = separator string between fields
record = separator string between records
rows = print progress for every given rows (default, 1000000)
file = output file name(default: uldrdata.txt)
log = log file name, prefix with + to append mode
fast = auto tuning the session level parameters(YES)
text = output type (MySQL, CSV, MYSQLINS, ORACLEINS, FORM, SEARCH).
charset = character set name of the target database.
ncharset= national character set name of the target database.
parfile = read command option from parameter file
for field and record, you can use '0x' to specify hex character code,
\r=0x0d \n=0x0a |=0x7c ,=0x2c, \t=0x09, :=0x3a, #=0x23, "=0x22

上面的参数中，比较常用的是：

  query：用这个参数可以自定义导出语句
    file：导出的文件名字和目录
    log：日志
    parfile：可以把参数放到parfile文件里，这个参数对于复杂sql很有用。
    field:设置导出文件里的分隔符

连接数据的方法：

  本地连接方式：

./sqluldr2linux64.bin user=gltest/gltest query="select * from T_H_BK_CUSTOMER_20180114_0;" file=/home/oracle/sqluldr2/T_H_BK_CUSTOMER_20180114_0.csv

客户端连接：TNS方式

./sqluldr2linux64.bin user=gltest/gltest@orcl query="select * from T_H_BK_CUSTOMER_20180114_0;" file=/home/oracle/sqluldr2/T_H_BK_CUSTOMER_20180114_0.csv

客户端连接：直接连接方式

./sqluldr2linux64.bin user=gltest/gltest@192.168.128.98:1521/orcl query="select * from T_H_BK_CUSTOMER_20180114_0;" file=/home/oracle/sqluldr2/T_H_BK_CUSTOMER_20180114_0.csv

测试导出速度：

因为我的sql比较长，所以用了parfile:

[oracle@gloracleserver2 sqluldr2]$ more customer.txt
user=gltest/gltest
query=select ent_code,code,name,cust_levels,dept_code,poi_id,status,createon,createby,lastupdateonfrom v30_md_customer;

看看导出输出，1100万数据不到30秒，速度很快。

[oracle@gloracleserver2 sqluldr2]$ ./sqluldr2linux64.bin parfile=/home/oracle/sqluldr2/customer.txt file=/home/oracle/sqluldr2/customer.csv
0 rows exported at 2018-01-16 20:25:09, size 0 MB.
1000000 rows exported at 2018-01-16 20:25:11, size 96 MB.
2000000 rows exported at 2018-01-16 20:25:14, size 196 MB.
3000000 rows exported at 2018-01-16 20:25:16, size 296 MB.
4000000 rows exported at 2018-01-16 20:25:18, size 392 MB.
5000000 rows exported at 2018-01-16 20:25:21, size 492 MB.
6000000 rows exported at 2018-01-16 20:25:23, size 592 MB.
7000000 rows exported at 2018-01-16 20:25:26, size 692 MB.
8000000 rows exported at 2018-01-16 20:25:28, size 788 MB.
9000000 rows exported at 2018-01-16 20:25:31, size 888 MB.
10000000 rows exported at 2018-01-16 20:25:34, size 988 MB.
11000000 rows exported at 2018-01-16 20:25:36, size 1088 MB.
11317061 rows exported at 2018-01-16 20:25:37, size 1121 MB.
output file /home/oracle/sqluldr2/customer.csv closed at 11317061 rows, size 1121 MB.

遇到的错误：

1. 导出文件里有中文显示乱码，需要设置参数charset=UTF8

2. ORA-24345: A Truncation or null fetch error occurred，设置参数safe=yes

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Oracle使用sqluldr2导出数据

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