MySQL中的ON DUPLICATE KEY UPDATE语法允许你在插入数据时,如果遇到了唯一键冲突,则执行更新操作。但有时候,我们可能希望在遇到冲突时不做任何操作,即“do nothing”。 虽然MySQL没有直接提供ON DUPLICATE KEY DO NOTHING的语法,但你可以通过以下几种方式来实现类似的效果: 使用INSERT IGNORE: 如果你希望在遇到唯一键...
DUPLICATE KEY UPDATE batch执行时出死锁错误背景知识一、 mysql insert 与 duplicate key:典型的插入语句:多条:INSERT INTO tablename...10) ON DUPLICATE KEY UPDATE data=data+10; UPDATE t...
问MySQL INSERT忽略或在重复键DO_NOTHING上插入EN我已经搜索了这样的主题，找到了2个不同的解决方案，但...
四、mysql的on duplicate key update语法 mysql并没有oracle、mssql的merge into语法,但是有个on duplicate key update语法(不是标准的sql语法)可以实现merge into语法。 ON DUPLICATE KEY UPDATE为Mysql特有语法,使用时应多注意主键和插入值是否是我们想要插入或修改的key、Value。 创建表,注意要有一个唯一索引 new_...
exist duplicate record THEN do something on duplicated rows ELSE do nothing END IF mysql示例 createtablet1 ( idbigintprimarykeyauto_increment, aintegerunique, bintegerdefault999);INSERTINTOtest_insert_on_dup_update(id, a)VALUES(1,1);INSERTINTOtest_insert_on_dup_update(id, a)VALUES(5,5);IN...
ON DUPLICATE KEY UPDATE insert ignore into users(user_id,user_name) values("111","naruto"),("222","sasuke") on duplicate key update user_name=values(user_name); ～～～ 回到顶部 自己的其他文档 并发处理IO任务与MySQL中ON DUPLICATE KEY UPDATE的使用...
exist duplicate record THEN do something on duplicated rows ELSE do nothing END IF 1. 2. 3. 4. 5. 6. 7. 8. mysql示例 create table t1 ( id bigint primary key auto_increment, a integer unique, b integer default 999 ); INSERT INTO test_insert_on_dup_update(id, a) ...
(flags & BTR_NO_LOCKING_FLAG) { /* Do nothing if no-locking is set */ err = DB_SUCCESS; } else if (trx->duplicates) { /* If the SQL-query will update or replace duplicate key we will take X-lock for duplicates ( REPLACE, LOAD DATAFILE REPLACE, INSERT ON DUPLICATE KEY UPDATE)...
Bug #39352 INSERT ON DUPLICATE returns 1 instead of 0 when nothing is changed Submitted: 9 Sep 2008 22:07Modified: 10 Oct 2008 10:03 Reporter: Lawrence Kesteloot Email Updates: Status: Closed Impact on me: None Category: Connector / JSeverity: S3 (Non-critical) Version: 5.0.x, 5.1...
Bug #32656 NDB: Duplicate key error aborts transaction in handler. Doesn't talk back to SQL Submitted: 23 Nov 2007 12:33Modified: 23 Sep 2009 18:48 Reporter: Konstantin Osipov (OCA) Email Updates: Status: Closed Impact on me: None Category: MySQL Cluster: Cluster (NDB) storage ...