Question

im geting this error when trying to do 2 counts inside of my query

first ill show you the query:

$sql = mysql_query("select c.id, c.number, d.name, 
                    (select count(*) from `parts` where `id_container`=c.id group by `id_car`) as packcount,
                    (select count(*) from `parts` where `id_container`=c.id) as partcount
                    from `containers` as c
                    left join `destinations` as d on (d.id = c.id_destination)
                    order by c.number asc") or die(mysql_error());

now the parts table has 2 fields that i need to use in the count:
id_car
id_container

id_car = the ID of the car the part is for
id_container = the ID of the container the part is in

for packcount all i want is a count of the total cars per container
for partcount all i want it a count of the total parts per container

Answer 1

It’s because of GROUP BY You’re using

Try something like

(select count(distinct id_car) from `parts` where `id_container`=c.id)

in You’re subquery (can’t check right now)

EDIT

PFY – I think UNIQUE is for indexes