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V2EX  ›  问与答

字段多对一，但一可能是俩个表中的一个，怎么设计比较好

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  •   chaunceywe · Jul 6, 2020 · 743 views
    This topic created in 2218 days ago, the information mentioned may be changed or developed.

    以前通常是直接用俩个字段，都允许空值然后取一个来设置，有更好的方案吗？

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