这种格式在数据库怎么样存最好. - V2EX
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Renco
V2EX    MySQL

这种格式在数据库怎么样存最好.

  •  
  •   Renco Sep 29, 2019 5617 views
    This topic created in 2416 days ago, the information mentioned may be changed or developed.

    格式

    是整体用 JSON 存,然后后台做特殊处理,还是分字段存

    下拉框有每日和每月

    7 replies    2019-09-29 20:35:38 +08:00
    kellie
        1
    kellie  
       Sep 29, 2019
    存 json 更灵活,但不好索引,权衡吧
    annielong
        2
    annielong  
       Sep 29, 2019
    我以前做的类似规则还是分字段存储的,调用方便,
    CoooooolFrog
        3
    CoooooolFrog  
       Sep 29, 2019
    用 JSON
    好处:灵活、字段可以随时修改,服务内部处理变更逻辑。
    坏处:没法用数据库索引,查询慢。
    QPS 低的情况下无所谓,随意,量大了就一定不能用 JSON。
    run2
        4
    run2  
       Sep 29, 2019
    @CoooooolFrog #3 MySQL 5.7.? 后就支持原生 json 查询了
    taotaodaddy
        5
    taotaodaddy  
       Sep 29, 2019 via Android
    看你对这里面的内部数据查询多不多了,如果每次都是整体加载,存 json,如果各项都有可能做查询条件,存成列
    est
        6
    est  
       Sep 29, 2019
    @kellie
    @CoooooolFrog

    老黄历了。5.7 支持 Generated Columns,这个可以物理化之后建索引。功能相当强大,可以把任意操作 json 的表达式抽出来建索引,甚至可以把一个 Array value 的 length 建成索引。dev.mysql.com/doc/refman/5.7/en/create-table-generated-columns.html
    liliuli808
        7
    liliuli808  
       Sep 29, 2019
    用 mongo 呢
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