What is the difference between ANSI and Unicode in MySQL 8.0 ODBC driver? What environmental factors affect the query of data? Why do I report an error and cannot query the data when I create an ODBC data source (ANSI) and connect to this data source through Visual Studio? Error message: ERROR [20218] [MySQL] [ODBC 8.0 (a) Driver] [mysqld 8.0.21]