Home Sign Up Sign In
chaunceywe
1.01D
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

  •   
  •   chaunceywe · Jul 6, 2020 · 723 views
    This topic created in 2203 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？

    No Comments Yet
    About   ·   Help   ·   Advertise   ·   Blog   ·   API   ·   FAQ   ·   Solana   ·   918 Online   Highest 6679   ·     Select Language
    创意工作者们的社区
    World is powered by solitude
    VERSION: 3.9.8.5 · 32ms · UTC 20:10 · PVG 04:10 · LAX 13:10 · JFK 16:10
    ♥ Do have faith in what you're doing.