MySQL中replace into用于插入或替换数据，若主键或唯一键冲突则先删除再插入。 4、 insert into用于插入新记录，若主键冲突则报错；replace into先删除冲突记录再插入新数据。

The MySQL relational database serves as a back end for millions of websites, and powers millions of non-Internet data-handling applications. In 2009 ownership of MySQL passed to Oracle when it bought ...