对数据库中的双精度值进行排序

Question

In the database I keep records to which codes are assigned (double format). When calling records from the database I would like them to be sorted from the smallest to the largest one.

The problem arises when 1.2 > 1.10 which is understandable. I would like it to be interpreted as follows: 1.10 > 1.2

I tried to do this by changing the type to TEXT. Adding spaces at the end of the "code".

I have an idea to divide the numbers into segments and if the first segment is equal then sort by the second segment. It seems logical, but I don't know how to translate it into code.

Could anyone help?

Answer 1

if your codes contain a valid decimal value the you could try converting the codes in order by as couple of integer

select codes 
from my_table
order by  ( CAST(left(codes, locate('.', codes)-1 ) AS UNSIGNED), 
    CAST(right(codes, length(codes -locate('.', codes)) AS UNSIGNED))