Solution to garbled characters when creating a table with plsqldeveloper to annotate fields

1. Check the server code:

execute SQL syntax: select * from v$nls_parameters;

2. Set the local client code:

enter my computer, properties, advanced, environment variables, add 2 items: LANG=zh_CN.GBK and NLS_LANG=" SIMPLIFIED CHINESE_CHINA.ZHS16GBK"

3. PL/SQL Developer set and reconnect:

in pl/sql developer's menu->tools->preferences->user interface->fonts change to Chinese font