oracle-导出-通过sqluldr2linux64导出数据为csv格式文件

1.下载安装sqluldr2

cd /u01/app/oracle/scripts
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chmod +x sqluldr2linux64.bin
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 ./sqluldr2linux64.bin -help
[oracle@compiler1002 expdp]$ ./sqluldr2linux64.bin -help

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 '=0x27 

2. 编辑sql文件

vi exportcsv.sql

select * from tableA;

3. 导出数据成csv

./sqluldr2linux64.bin user=user/passowd@PDMSDB sql=exportcsv.sql file=data20210424-26.csv text=csv

4. 压缩

tar -czvf data20210424-26.csv.tar.gz data20210424-26.csv

5. 解决csv文件打开是乱码的问题

将数据库的数据导出为CSV文件，之后用excel打开，出现了乱码情况.
原因：CSV是用UTF-8编码的，而EXCEL是ANSI编码，由于编码方式不一致导致出现乱码。

解决办法：用记事本打开CSV文件----->文件------>另存为------>点编码------>选择ANSI----->保存，然后用excel打开就不会是乱码了。