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-rwxrwxrwx 1 oracle oinstall 185894 1月 27 2016 sqluldr2linux64.bin
直接执行就能显示帮助
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[oracle@hecomoracleserver2 sqluldr2]$ ./sqluldr2linux64.bin
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SQL*UnLoader: Fast Oracle Text Unloader (GZIP, Parallel), Release 4.0.1
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(@) Copyright Lou Fangxin (AnySQL.net) 2004 - 2010, all rights reserved.
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License: Free for non-commercial useage, else 100 USD per server.
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Usage: SQLULDR2 keyword=value [,keyword=value,...]
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Valid Keywords:
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user = username/password@tnsname
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sql = SQL file name
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query = select statement
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field = separator string between fields
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record = separator string between records
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rows = print progress for every given rows (default, 1000000)
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file = output file name(default: uldrdata.txt)
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log = log file name, prefix with + to append mode
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fast = auto tuning the session level parameters(YES)
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text = output type (MYSQL, CSV, MYSQLINS, ORACLEINS, FORM, SEARCH).
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charset = character set name of the target database.
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ncharset= national character set name of the target database.
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parfile = read command option from parameter file
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for field and record, you can use '0x' to specify hex character code,
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\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：
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./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
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./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
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./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:
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[oracle@gloracleserver2 sqluldr2]$ more customer.txt
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user=gltest/gltest
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query=select ent_code,code,name,cust_levels,dept_code,poi_id,status,createon,createby,lastupdateon from v30_md_customer;
看看导出输出，1100万数据不到30秒，速度很快。
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[oracle@gloracleserver2 sqluldr2]$ ./sqluldr2linux64.bin parfile=/home/oracle/sqluldr2/customer.txt file=/home/oracle/sqluldr2/customer.csv
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0 rows exported at 2018-01-16 20:25:09, size 0 MB.
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1000000 rows exported at 2018-01-16 20:25:11, size 96 MB.
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2000000 rows exported at 2018-01-16 20:25:14, size 196 MB.
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3000000 rows exported at 2018-01-16 20:25:16, size 296 MB.
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4000000 rows exported at 2018-01-16 20:25:18, size 392 MB.
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5000000 rows exported at 2018-01-16 20:25:21, size 492 MB.
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6000000 rows exported at 2018-01-16 20:25:23, size 592 MB.
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7000000 rows exported at 2018-01-16 20:25:26, size 692 MB.
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8000000 rows exported at 2018-01-16 20:25:28, size 788 MB.
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9000000 rows exported at 2018-01-16 20:25:31, size 888 MB.
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10000000 rows exported at 2018-01-16 20:25:34, size 988 MB.
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11000000 rows exported at 2018-01-16 20:25:36, size 1088 MB.
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11317061 rows exported at 2018-01-16 20:25:37, size 1121 MB.
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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
