mysql varchar类型转换int类型或者浮点数

select * from gyzd_yysinfo order by cast(yysid as SIGNED INTEGER)

或者

select * from gyzd_yysinfo order by cast(yysid as UNSIGNED INTEGER)

浮点数
select cast(“23333.3333” as decimal(9,2));

https://www.cnblogs.com/crystaltu/p/7929975.html
https://blog.csdn.net/hwsdau/article/details/68944655