ERROR 1010 (HY000) of Mysql

When I delete the db, I get the following error:

ERROR 1010 (HY000): Error dropping database (can't rmdir './yourdb/', errno: 17)

reason:

1. There are other files corresponding to non-table files in the database directory, such as sql or txt data for exporting data

2. The db directory is occupied

solve:

1. Delete other irrelevant files and execute drop database