coffee 开发者_如何学编程2021-06-05 16:09 看了，哈哈哈wendy 2021-06-05 16:11 开发者_高级运维鲶鱼啊……ty_f461
Is it correct to represent a foreign key on a conceptual data model, or should I only introduce fore开发者_StackOverflowign keys when I am doing the relational model?Experts are divided on this one.He
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