If you're seeing the Illegal mix of collations error in MySQL, it's likely due to comparing two strings of incompatible collation or attempting to select data of different collation into a combined column. In this article, we'll explore some solutions to this error, including changing the database, table, and column collation, using the COLLATE clause, and the BINARY operator. Follow these steps to fix the Illegal mix of collations error in MySQL and get your database back up and running.