mysql varcahr 转 int

varcahr 转 int

CAST() 和 CONVERT() 函数均可将 varcahr 转 int 。

select CAST('123' as SIGNED);

select CONVERT('123', SIGNED);

示例1：

select '123' > '23';
select 123 > '23';
select cast('123' as SIGNED)> '23'; /*与此结果相同：select 123 > '23';*/

示例2：按照排序值（varchar类型）从大到小排序

select * from dictData order by CAST(sort as SIGNED) desc;