PHP SQL Count 3列总计，并按另一列分组

Question

I am trying to put together an SQL query where I can count 3 columns and group by another one.

Here is the table:

id thedate cars bikes planes from stats group by thedate

What I'm trying to do is to get the totals for each day of each cars, bikes and planes.

So I've tried:

SELECT id, thedate, cars, bikes, planes from stats GROUP BY thedate

SELECT id, thedate, count(cars), count(bikes), count(planes) from stats GROUP BY thedate

None of them work.

How can I do this?

Answer 1

SELECT DATE(thedate), count(cars), count(bikes), count(planes) from stats GROUP BY DATE(thedate)

您应该仅按日期分组（没有小时和分钟），并且不应选择id字段。