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问： 如果密码中包含反斜线，该如何处理呢？
答： 在mysql中，反斜线"\"是有特殊意义的，用于转义，因此如果密码中包含"\"，就需要特别注意。有一种一劳永逸的办法，就是在密码中不用反斜线，哈哈。另一种，那就是需要多加几个反斜线，例如：

(root:hostname:Thu Oct 15 09:15:38 2009)[mysql]> grant usage on *.* to yejr@localhost identified by 'ye\\\jr'; 
Query OK, 0 rows affected (0.02 sec)
(root:imysql.cn:Thu Oct 15 09:16:22 2009)[mysql]> select password('ye\jr');
+-------------------------------------------+
| password('ye\jr')                         |
+-------------------------------------------+
| *9DB91006131E32B22135599033C6A9C196EC3C6B | 
+-------------------------------------------+
1 row in set (0.00 sec)
(root:imysql.cn:Thu Oct 15 09:23:32 2009)[mysql]> select host,user,password from user where user='yejr';         
+-----------+------+-------------------------------------------+
| host      | user | password                                  |
+-----------+------+-------------------------------------------+
| localhost | yejr | *F06D79D5F57894772B64BF3164ABB714EBDBD3E2 | 
+-----------+------+-------------------------------------------+
1 row in set (0.01 sec)
(root:imysql.cn:Thu Oct 15 09:16:28 2009)[mysql]> select password('ye\\\jr');
+-------------------------------------------+
| password('ye\\\jr')                       |
+-------------------------------------------+
| *F06D79D5F57894772B64BF3164ABB714EBDBD3E2 | 
+-------------------------------------------+
1 row in set (0.01 sec)
[@tc_10.11.54.224_cnc ~]# mysql -uyejr -p'ye\jr'
Logging to file '/home/mysql/query.log'
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 63
Server version: 5.x.x-percona-highperf-x-log MySQL Percona High Performance Edition (GPL)
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
原贴地址：http://imysql.cn/2009/03/25/mysql-faq-password-with-slash.html
作者：yejr

(yejr:imysql.cn:Thu Oct 15 09:24:58 2009)[(none)]> Bye

从上面的例子可以看到，如果密码中有反斜线，就需要在它前面再加2个反斜线。