我的电脑装了mysql，设定root密码为root，创建了名为test的数据库,但是测试sqlmap的时候，用如下语句：
sqlmap -d "mysql://root:root@127.0.0.1:3306/test" -f
总是提示我
you provided 'mysql' as a back-end DBMS, but from a past scan information on the
target URL sqlmap assumes the back-end DBMS is 'oracle'. Do you really want to
force the back-end DBMS value? [y/N] y
[15:48:55] [INFO] testing MySQL
[15:48:55] [WARNING] the back-end DBMS is not MySQL
[15:48:55] [INFO] testing Oracle
[15:48:55] [INFO] confirming Oracle
[15:48:55] [INFO] the back-end DBMS is Oracle
[15:48:55] [INFO] actively fingerprinting Oracle
back-end DBMS: active fingerprint: Oracle Unknown
可是我电脑上从来就没装过oracle