I have a column (kills) with values separated by colons as such: 0;2;0. I wanted to select whatever the middle digit may be, and came up with this query:
SELECT RIGHT(kills, LOCATE(';', kills) - 1)-LEFT(kills, LOCATE(';', kills) - 1) FROM stats WHERE id='135' AND LOCATE(';', kills) > 0;
(I'm aware the where clause is specific, it was for debug purposes. It would realistically be set to a variable which outputs the row id)
It works perfectly fine when the results all have the same decimal place such as 1;2;3 or 10;20;30, but returns wild results when the case is otherwise, such as 1;20;30 or 10;20;3.
1;20;21 outputs 0. -- 10;20;2 outputs -10.
2;20;21 outputs -1. -- 20;20;2 outputs -20.
9;20;21 outputs -8. -- 90;20;2 outputs -90.
I would like to select the middle value of all of these values even if one value doesn't share the same decimal place.
答案 0 :(得分：1)
If you want the middle number of three, then you want the second number. Use substring_index():
select substring_index(substring_index(kills, ';', 2), ';', -1)