I Use PL/developer to manage my oracle db,I found a interest question,I use sql "insert into sysuser(id,usercode,username,password) values(7,'Hello','中国','123')" ,it can insert a data row into my database , but i usr table-->edit data menu ,i fill the datagrid to new row,the data is 7,hello,中国,123.then i use post changes button ,but this programm tell a ora-01461 error,but I use this tool in another machince ,i run well .can you help me.