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。

SQLyog is available in three major versions: Professional, Enterprise and Ultimate. Differences among the three versions primarily lie in the number of included features such as data migration, ...