MYSQL 插入时判断重复就不插入,不影响原记录 - V2EX
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eabet
V2EX    MySQL

MYSQL 插入时判断重复就不插入,不影响原记录

  •  
  •   eabet Dec 20, 2016 4826 views
    This topic created in 3426 days ago, the information mentioned may be changed or developed.
    用 REPLACE INTO 的话是更新,有没有办法不影响原记录呢?
    11 replies    2016-12-21 23:01:56 +08:00
    julyclyde
        1
    julyclyde  
       Dec 20, 2016
    insert ignore?
    billlee
        2
    billlee  
       Dec 20, 2016
    那你为什么用 REPLACE 干嘛,用 INSERT
    north521
        3
    north521  
       Dec 20, 2016
    ON DUPLICATE KEY UPDATE
    inaho
        4
    inaho  
       Dec 20, 2016
    楼上+1 , 加个唯一索引
    TaMud
        5
    TaMud  
       Dec 20, 2016
    1 、唯一索引
    2 、 WHERE NOT EXISTS
    darrenfang
        6
    darrenfang  
       Dec 21, 2016 via iPhone
    insert ignore
    wwulfric
        7
    wwulfric  
       Dec 21, 2016
    唯一索引会报错啊
    Zuckonit
        8
    Zuckonit  
       Dec 21, 2016
    1. mysql
    2. unique index
    3. ON DUPLICATE KEY UPDATE / INSERT IGNORE
    anthow
        9
    anthow  
       Dec 21, 2016
    merge into ... when not matched then insert...
    ihuotui
        10
    ihuotui  
       Dec 21, 2016
    捕获唯一索引的错误,然后变为更新操作啊。
    rekulas
        11
    rekulas  
       Dec 21, 2016
    insert into table1(a,b,c) select v1,v2,v3 from dual where not exists (select * from table1 where a='a')
    这样也可以无重复插入
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