I want to get on Mysql:
So I want to know the number of rows where each runner is present, even if he is in runnerA or runnerB.
An exemple:
My datas:
id | id_runnerA | id_runnerB | done |
---|---|---|---|
1 | 12 | 5 | 1 |
2 | 20 | 12 | 1 |
3 | 12 | 1 | 3 |
The result should be:
id_runner | count |
---|---|
12 | 2 |
20 | 1 |
5 | 1 |
Thank you
Looks like it might be
SELECT
id_runner, count(*)
FROM
(
SELECT id_runnera as id_runner FROM t WHERE done < 2
UNION ALL
SELECT id_runnerb FROM t WHERE done < 2
) x
GROUP BY
id_runner
But it'd be helpful to see some more test data
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