Question

let say I have this table

no | date       | no1   | no2    | no3   |
------------------------------------------
01 | 1993-05-01 | 0019  | 1124   | 0592  | 
02 | 1993-05-02 | 1234  | 4221   | 5543  | 
03 | 1993-05-03 | 4321  | 0019   | 0019  | 
04 | 1993-05-04 | 0019  | 1112   | 6876  | 

What MySQL Query will return the most repeated number and sort them by latest date?

Answer 1

You would need to “flatten” you data set first. You can do this by running 1 query for each column, then doing a UNION and a SELECT on the unions with a group by.

SELECT date, no, SUM(c) c FROM (
SELECT max(date) date, no1 AS no, count(no1) c FROM table GROUP BY no
UNION
SELECT max(date) date, no2 AS no, count(no1) c FROM table GROUP BY no
UNION
SELECT max(date) date, no3 AS no, count(no1) c FROM table GROUP BY no
) grouped_data GROUP BY no ORDER BY c DESC