在Mysql中显示4(四)个表中的数据

时间:2015-02-02 08:26:38

标签: php mysql

我实际上只需要一个简单的查询,

以下是我的表格:

  

信息 - > id_info,year,information_name,person_name,country_id,state_id,city_id

     

国家/地区 - > id,country_id,country_name

     

- > id,state_id,country_id,state_name

     

城市 - > id,city_id,state_id,city_name

我已经运行了一些查询,例如' s:

                         SELECT * 
                         FROM information, country, state, city 
                         WHERE information.country_id =country.country_id 
                         AND information.state_id = state.state_id
                         AND information.city_id = city.city_id 
                         GROUP BY information.id_info;

我的简单脚本:

echo '<td>'.$data['country_name'].'</td>

echo '<td>'.$data['state_name'].'</td>

echo '<td>'.$data['city_name'].'</td>

$data-> Is my while script with $query=mysql_query...

从上面的查询中只显示我数据库中的两(2)个数据,但在数据库中它有五(5)个数据。

然后我试图删除Group语句,但数据保持循环并显示近8000个数据,但我只有5个数据表。

我已尝试过一切,左连接,右连接,内联......

我需要帮助,我知道这很简单,但我怎样才能正常显示所有数据。

感谢。

此处显示数据的完整脚本:

<table cellpadding="5" cellspacing="0" border="1">
    <tr bgcolor="#CCCCCC">
        <th>No.</th>
        <th>Year</th>
        <th>Information Name</th>
        <th>Person Name</th>
        <th>Country</th>
        <th>State</th>
        <th>City</th>
        <th>Act</th>
    </tr>

    <?php
    include('connect.php');

    $query = mysql_query("SELECT *
                  FROM information
                  INNER JOIN country ON information.country_id =country.country_id
                  INNER JOIN state ON information.state_id = state.state_id
                                  INNER JOIN city ON information.city_id = city.city_id
                                  GROUP BY information.country_id, information.state_id, information.city_id") or die(mysql_error());


    if(mysql_num_rows($query) == 0){


        echo '<tr><td colspan="6">No data!</td></tr>';

    }else{  


        $no = 1;    
        while($data = mysql_fetch_assoc($query)){   

            echo '<tr>';
                echo '<td>'.$no.'</td>';    
                echo '<td>'.$data['year'].'</td>';  
                echo '<td>'.$data['information_name'].'</td>';  
                echo '<td>'.$data['person_name'].'</td>';   
                echo '<td>'.$data['country_name'].'</td>';  
                echo '<td>'.$data['state_name'].'</td>';    
                echo '<td>'.$data['city_name'].'</td>'; 
                echo '<td><a href="viewinfo.php?id='.$data['id_info'].'">Detail</a> / <a href="edit.php?id='.$data['id_info'].'">Edit</a> / <a href="delete.php?id='.$data['id_info'].'" onclick="return confirm(\'Are You Sure?\')">Delete</a></td>';  
            echo '</tr>';

            $no++;  

        }

    }
    ?>

3 个答案:

答案 0 :(得分:2)

假设正确使用索引键,您可以使用INNER JOIN:

SELECT country.country_name,
       state.state_name,
       city.city_name
FROM information
INNER JOIN country ON information.country_id = country.country_id
INNER JOIN state ON information.state_id = state.state_id
INNER JOIN city ON information.city_id = city.city_id

答案 1 :(得分:1)

尝试更改GROUP BY并使用INNER JOIN:

  SELECT *
  FROM information
   INNER JOIN country ON information.country_id =country.country_id
   INNER JOIN state ON information.state_id = state.state_id
   INNER JOIN city ON information.city_id = city.city_id
   GROUP BY information.country_id, information.state_id, information.city_id

答案 2 :(得分:0)

现在有效,*叹息问题是信息表,我必须先清空表。

我发生了很多事,记录是问题来源,我已经经历了很多这样的事情。谢谢大家的帮助,现在它的工作非常好。

上面的两个答案完美无缺,谢谢。