最大计数查询

Question

This is my table and the table name is "ad_publisher_details". I want to find the maximum publisher company name means the company name who has most number of rows. Can anyone help?

Table:-

 <table> <thead> <th> ad_id </th> <th> publisher_name </th> <th> publisher_company </th> </thead> <tbody> <tr> <td> 1 </td> <td> bikroy manager </td> <td> bikroy.com </td> </tr> <tr> <td> 2 </td> <td> olx manager </td> <td> olx.com </td> </tr> <tr> <td> 3 </td> <td> microsoft manager </td> <td> microsoft bangladesh </td> </tr> <tr> <td> 4 </td> <td> microsoft manager </td> <td> microsoft bangladesh </td> </tr> <tr> <td> 5 </td> <td> marketing manager </td> <td> land rover </td> </tr> </tbody> </table>

After SQL query it will return only the publisher_company value "Microsoft Bangladesh". As it has the most row.

Answer 1

You should:

1. GROUP BY publisher
2. ORDER BY number of rows, in descending order.
3. LIMIT the results to single row.

In other words you can do:

SELECT publisher_company
 FROM ad_publisher_details
 GROUP BY publisher_company
 ORDER BY COUNT(*) DESC
 LIMIT 1;

Answer 2

And at last i found the solution. I have to do a lot more php code to do so. Here is my solution.

<?php
                                            $i=0;
                                            $j=0;
                                            $br_temp=0;
                                            $query1="SELECT publisher_company FROM ad_publisher_details WHERE 1";
                                            $result1=mysql_query($query1,$dbs);
                                            while($row1=mysql_fetch_array($result1))
                                            {
                                                $publisher_company[$i]=$row1['publisher_company'];
                                                $i++;
                                            }
                                            for($i=0;$i<count($publisher_company);$i++)
                                            {
                                                $temp2= $publisher_company[$i];
                                                $query2="SELECT COUNT(ad_id) AS count_ad FROM ad_publisher_details WHERE publisher_company='$temp2'";
                                                $result2=mysql_query($query2,$dbs);
                                                while($row2=mysql_fetch_array($result2))
                                                {
                                                    $most_ad[$j]=$row2['count_ad'];
                                                    $j++;
                                                }
                                            }
                                            $highest_ad = max($most_ad);
                                            for($i=0;$i<count($publisher_company);$i++)
                                            {
                                                $i_temp = $publisher_company[$i];
                                                $query3="SELECT COUNT(ad_id) AS match_ad FROM ad_publisher_details WHERE publisher_company='$i_temp'";
                                                $result3=mysql_query($query3,$dbs);
                                                while($row3=mysql_fetch_array($result3))
                                                {
                                                    if($highest_ad==$row3['match_ad'])
                                                    {
                                                        echo $i_temp;
                                                        $br_temp=1;
                                                        break;
                                                    }
                                                    if($br_temp==1)
                                                    {
                                                        break;
                                                    }
                                                }
                                                if($br_temp==1)
                                                {
                                                    break;
                                                }
                                            }

                                            ?>