解决方法：
先导出为txt文件，其内容是以逗号“，”分隔的，得到txt文件后，再自行处理为.csv或者.xls文件。
参数说明：
-t, --no-create-info Don't write table creation info.
-T, --tab=name Create tab-separated textfile for each table to given path. (Create .sql and .txt files.) NOTE: This only works if mysqldump is run on the same machine as the mysqld server.
--fields-terminated-by=name Fields in the output file are terminated by the given string.
--fields-enclosed-by=name Fields in the output file are enclosed by the given character.
1. 先查看可导出位置(不然会涉及到权限问题)
mysql> show variables like 'secure_file_priv';+------------------+-----------------------+
| Variable_name | Value |
+------------------+-----------------------+
| secure_file_priv | /var/lib/mysql-files/ | //如果出现权限问题，尝试把该目录所有者改成mysql
+------------------+-----------------------+
1 row in set (0.00 sec)
2. 执行导出命令
[root@server-10 ~]# mysqldump -uroot -p -t -T /var/lib/mysql-files/ mydb customers --fields-terminated-by=',' --fields-enclosed-by='\"'
3. 查看一下
[root@server-10 ~]# ls -l /var/lib/mysql-files/total4
-rw-r--r-- 1 root root 0 Aug 28 15:35customers.sql//会同步生成同名sql文件，内容为空-rw-rw-rw- 1 mysql mysql 458 Aug 28 15:35customers.txt
[root@server-10 ~]# cat /var/lib/mysql-files/customers.txt"10001","Coyote Inc.","200 Maple Lane","Detroit","MI","44444","USA","Y Lee","ylee@"
"10002","Mouse House","333 Fromage Lane","Columbus","OH","43333","USA","Jerry Mouse",\N"10003","Wascals","1 Sunny Place","Muncie","IN","42222","USA","Jim Jones","rabbit@"
"10004","Yosemite Place","829 Riverside Drive","Phoenix","AZ","88888","USA","Y Sam","sam@"
"10005","E Fudd","4545 53rd Street","Chicago","IL","54545","USA","E Fudd",\N
4. 如果不想每个字段带冒号，则省略--fields-enclosed-by='\"'即可
[root@server-10 ~]# mysqldump -uroot -p -t -T /var/lib/mysql-files/ mydb customers --fields-terminated-by=','
5. 再查看一下输出的变化
[root@server-10 ~]# ls -l /var/lib/mysql-files/total4
-rw-r--r-- 1 root root 0 Aug 28 15:35customers.sql-rw-rw-rw- 1 mysql mysql 372 Aug 28 15:36customers.txt
[root@server-10 ~]# cat /var/lib/mysql-files/customers.txt10001,Coyote Inc.,200 Maple Lane,Detroit,MI,44444,USA,Y Lee,ylee@10002,Mouse House,333 Fromage Lane,Columbus,OH,43333,USA,Jerry Mouse,\N10003,Wascals,1 Sunny Place,Muncie,IN,42222,USA,Jim Jones,rabbit@10004,Yosemite Place,829 Riverside Drive,Phoenix,AZ,88888,USA,Y Sam,sam@10005,E Fudd,4545 53rd Street,Chicago,IL,54545,USA,E Fudd,\N
结束.
