0

I want to get the number of rows where the "value" field is equal to 1, and output its number and all the content_id where value_type is option in table votingapi_vote. the following is my code, but it doesn't work.

$result = db_query("SELECT content_id,count(value=1) FROM {votingapi_vote} WHERE value_type = '%s'" , "option");

while ($obj = db_fetch_object ($result)) {
  return $obj->content_id.'<br>'.'$obj->count';
}

it showed an error. when i delete the filed value in the query. it only output one result of $obj->content_id/ why? i want to output all the results of $obj->content_id

ps: now, if i want to get this result.

1,get the content_id and descending it according to the value(the count of each content_id 's value=1 substract the count of each content_id 's value=0 ,each content_id has many value=0 or value=1)

how to write the query.

2

First, that condition syntax is just wrong, you need to add that as a WHERE condition. Second, if you want the count per content id, you need to group by that.

And third, you need to collect the output in a variable instead of returning it directly.

Something like this:

$result = db_query("SELECT content_id, COUNT(*) AS count FROM {votingapi_vote} WHERE value_type = '%s'"  AND value = 1 GROUP BY content_id, "option");

$output = '';
while ($obj = db_fetch_object ($result)) {
  $output .= $obj->content_id.'<br>' . $obj->count;
}
return $output;
  • how to output the count number? echo $obj->COUNT ? why use group by? thank you – enjoylife May 20 '11 at 9:49
  • could i add a substract to the query. i have update the question.thank you – enjoylife May 20 '11 at 9:52
  • it doesn't print the $obj->count;? why? – enjoylife May 20 '11 at 12:34
  • If you want to print it, replace return with print. – Berdir May 20 '11 at 12:41
  • you misunderstood my meaning. when you print $obj->count. there is no any output? why? thank you – enjoylife May 20 '11 at 12:57

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.