mysql varchar integer

MySQL 中将 varchar 字段转换成数字进行排序 - MySQL - 大象笔记

https://www.sunzhongwei.com/order-by-varchar-field-which-is-converted-into-number-in-mysql

mysql 对varchar型数字排序-云栖社区-阿里云
https://yq.aliyun.com/articles/392822

Mysql的varchar排序按照数字顺序 - ROVAST的专栏 - CSDN博客
https://blog.csdn.net/rovast/article/details/51564081

mysql varchar类型转换int类型 - 老猫的TOM - CSDN博客
https://blog.csdn.net/qq355667166/article/details/5897778