How do I can't delete originally used to test the database, and also can't create table, nor to the table to add data, adding data or create table will prompt the error message. How to deal with. How to delete the old database! How do I can't delete originally used to test the database, and also can't create table, nor to the table to add data, adding data or create table will prompt the error message. How to deal with. How to delete the old database!