新手求一个单表无效数据去重的思路 - V2EX
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noipnoid
V2EX    MySQL

新手求一个单表无效数据去重的思路

  •   
  •   noipnoid Apr 22, 2020 2672 views
    This topic created in 2217 days ago, the information mentioned may be changed or developed.
    A 字段跟 B 字段相同,并且记录的 create_time 间隔小于时间 5 分钟的记录,取时间最前的那一条记录
  • 单表
  • 记录
  • 间隔
  • 新手
    2 replies    2020-04-22 15:23:36 +08:00
    xizismile
        1
    xizismile  
       Apr 22, 2020 via Android
    sql 去重？整到应用层来处理这个逻辑不香吗？
    KentY
        2
    KentY  
       Apr 22, 2020
    我 sql-fu 很一般. 但是这个看起来相对容易啊

    from Table where a=b and create_ts > "5min ago" order by create_ts limit 1
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