Med MySQL kan du bruge SUM(condition)
:
SELECT id, SUM(value=0) AS n0, SUM(value=1) AS n1, COUNT(*) AS total
FROM mytable
GROUP BY id
Se den på sqlfiddle .
Med MySQL kan du bruge SUM(condition)
:
SELECT id, SUM(value=0) AS n0, SUM(value=1) AS n1, COUNT(*) AS total
FROM mytable
GROUP BY id
Se den på sqlfiddle .