I have run a query using COUNT(id) as a way to sum up the number of rows with a given id. I now want to print that number. Since there are many ids, I need to print it many times. I think each pageid/count(id) is its own row of the table but maybe I am wrong. Here is the gist of the code (apologies for using mysql_query):
$sql = "SELECT pageid, COUNT(id) FROM views
GROUP BY pageid
ORDER BY COUNT(id)"
$res = mysql_query($sql);
while($row = mysql_fetch_array($res)) {
echo $row['pageid'];
echo $row['count(id)'];
}
except the last line is not working.
Thanks for help!
Array indexes are case-sensitive. Since you're selecting COUNT(id)
, you should use $row['COUNT(id)']
and not $row['count(id)']
.
Alternatively, you can give the count an alias.
$sql = "SELECT pageid, COUNT(id) pagecount FROM views
GROUP BY pageid
ORDER BY COUNT(id)"
With the above, you could use $row['pagecount']
.
$sql = "SELECT pageid, COUNT(id) as tot_id FROM views
GROUP BY pageid
ORDER BY id"
...
echo $row['tot_id'];
您必须大写计数,因为它在sql Call中设置为COUNT。
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.