mysql - Subdividing a string and using substrings as fraction components -

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i'm trying return set of string values mysql query. separate them @ '/' character (which contain). , divide value before '/' character, value follows it.

i've tried casting substring int , several decimal variations. gratefully accepted.

        "         cast(             cast(                 substring(                     customerfeedback.total_score,                      0, locate('/', table.column_a-1)                 )as decimal(6,3)             )             /             cast(                 substring(                     customerfeedback.total_score,                     locate('/', table.column_a+1), length(table.column_a)                 )as decimal(6,3)             )             decimal(6,3)         )         "

use substring_index extract numerator , denominator parts , use them in division.

example: 

select    @str:='225/12',    @n:=substring_index( @str, '/', 1 ) numerator,    @d:=substring_index( @str, '/', -1 ) denominator,    @n/@d quotient;

result of above example: 

+----------------+-----------+-------------+----------+ | @str:='225/12' | numerator | denominator | quotient | +----------------+-----------+-------------+----------+ | 225/12         | 225       | 12          |    18.75 | +----------------+-----------+-------------+----------+

you can cast or round of quotient desired.


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