Met MySQL kunt u SUM(condition)
. gebruiken :
SELECT id, SUM(value=0) AS n0, SUM(value=1) AS n1, COUNT(*) AS total
FROM mytable
GROUP BY id
Bekijk het op sqlfiddle .
Met MySQL kunt u SUM(condition)
. gebruiken :
SELECT id, SUM(value=0) AS n0, SUM(value=1) AS n1, COUNT(*) AS total
FROM mytable
GROUP BY id
Bekijk het op sqlfiddle .