如何在asp.net中建立多对多关系

问题描述

我有三个表n，这些是属性:

域=> domain_id，domain_name

测试=> test_id，标题，domain_id

问题=> ques_id，test_id，答案

所以我想在它们之间添加关系....通过给出错误

请告诉我如何将这些表与关系相互关联

i have three table n these are the attributes:

domain=> domain_id, domain_name

test=> test_id, title, domain_id

question=> ques_id, test_id, answer

so i want to add relationship between....by its giving a error

please tell me how can i interrelate these table with relationship

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