在表中插入多行而不插入重复行
I would like to merge a table that the data comes from 2 differents databases. I operated as described below: 我想合并一个数据来自2个不同数据库的表。我操作如下: 1 – I have do...
mysql 存储过程判断重复的不插入数据
这篇文章主要介绍了下面是一个较常见的场景,判断表中某列是否存在某值,如果存在执行某操作,需要的朋友可以参考下
在表中插入多行而不插入重复行
I would like to merge a table that the data comes from 2 differents databases. I operated as described below: 我想合并一个数据来自2个不同数据库的表。我操作如下: 1 – I have do...
php/mysql - PDO准备插入,不工作,没有错误消息[重复]
This question already has an answer here: 这个问题已经有了答案: My PDO Statement doesn't work 1 answer 我的PDO语句不能工作1个答案 I really have NO idea of what...
数据库表中不建索引,在插入数据时,通过sql语句防止重复添加
sql 语句INSERT IGNORE INTO table(aaa,bbb)SELECT '1111','2222' FROM DUALWHERE NOT EXISTS( SELECT id FROM table WHERE bbb= '')mybatis 中代码<insert id="a...