insert ignore into test_data values(4,'cc');Query OK, 1 row affected (0.01 sec) select * from test_data;+---+---+| id | name |+---+---+| 1 | aa || 2 | bb || 3 | cc || 4 | cc |+---+---+4 rows in set (0.00 sec) replace into场景 >>replace into test_data...
constmysql=require('mysql');constconnection=mysql.createConnection({host:'localhost',user:'root',password:'password',database:'mydatabase'});connection.connect((err)=>{if(err)throwerr;console.log('Connected!');});constreplaceData=(table,column,oldValue,newValue)=>{constquery=`UPDATE${table}...
mysql >>select * from test1; +---+---+ | id | age | +---+---+ | 2 | 2 | | 3 | 3 | +---+---+ 2 rows in set (0.00 sec) mysql >>replace into test1 values (6,3); Query OK, 2 rows affected (0.00 sec) mysql >>select * from test1; +---+---+ | id | ag...
MySQL Forums Forum List » Optimizer & Parser Advanced Search New Topic Re: Optimize subquery, replace IN() with JOINPosted by: Miron jajtic Date: November 16, 2016 03:22PM Hello Peter, Excellent, thank you very much. Your query is working on production database in less than 0.3...
经验证:mysql5.7 和mysql8.0均是上诉情况 结论 replace into在只存在主键冲突时会按预期的那样;若只有唯一索引冲突时 主从切换后导致新主库主键冲突错误、下游大数据数据不一致问题;同时存在主键冲突和唯一索引冲突可能会导致丢失数据。业务上不应使用replace into,应该在代码对唯一数据冲突作处理...
使用场景1 – (Query语句): 需求:把"hero_title"字段中所有的"之"换成" - "来展示,SQL如下: SELECTREPLACE(hero_title,'之',' - ')as repl_title,hero_name,price from LOL; 代码语言:javascript 代码运行次数:0 运行 AI代码解释 mysql>SELECTREPLACE(hero_title,'之',' - ')asrepl_title,hero_name...
1 row in set (0.00 sec) insert ignore into test_data values(4,'cc'); Query OK, 1 row affected (0.01 sec) select * from test_data; +---+---+ | id | name | +---+---+ | 1 | aa | | 2 | bb | | 3 | cc | | 4 | cc ...
mysql>replaceintotest(id,name,uid,age)values(1,'aa',101,20),(2,'bb',102,21); Query OK,2rows affected (0.01sec) Records:2Duplicates:0Warnings:0mysql>select*fromtest;+---+---+---+---+|id|name|uid|age|+---+---+---+---+|1|aa|101|20||2|bb|102|21|+---+---+--...
1 row in set (0.00 sec) root@test 01:16:26>insert into tt(name) values('a') on duplicate key update name='a'; Query OK, 1 row affected (0.00 sec) root@test 01:17:09>show create table t1 \G *** 1. row *** Table: t1 Create Table: CREATE TABLE `t1` ( `id` int(11)...
mysql>replaceintot (a,b)values(1,7);Query OK, 2rowsaffected (0.01 sec)mysql> showcreatetablet\G*** 1. row ***Table: tCreateTable:CREATETABLE`t` (`id`int(11)NOTNULLAUTO_INCREMENT,`a`int(11)DEFAULT'0',`b`int(11)DEFAULT'0',`c`int(11)DEFAULT'0',PRIMARYKEY(`id`),UNIQUEKEY`...