问题
填空题
[问题2] 试用ORDB的定义语言，定义这个数据库。
答案
参考答案：CREATETYPE MyString char vaiying;
解析：CREATE TABLE student ( sno integer, shame MyString, city MyString studies setoff ( ref (study))); CREATETABLE study (coursename MyString grade integer, city MyString, university MyString, student ( ref (student) ) );