Kyungran Noh

Dear Dr. Chen, I have some problems to get a hierarchy of keywords or phrases. First, I've tried to use MySQL database many times. CiteSpace repeatedly poped up message windows to input MySQL host name, user name, and password although I connected to MySQL server. Could you tell me what to do? Second, How do I import my cluster into MySQL database for the first time? Should I first create MySQL DB first? Or, is a DB created if I import a cluster that has been generated in CiteSpace? I would appreciate...