Question

我有一个包含PRTL_BusRoute的表格，其中涉及各个区域的ID，AreaID作为每个区域下的ID's区域。

**ID**   **BustrouteID**   **AreaID**

    0          1             3
    1          1             5
    1          1             6
    2          2             5
    3          2             6    
    4          2             8
    5          3             9
    6          3             12
    7          4             1
    8          4             8
    9          4             11

巴士路线的名称存储在tbl_BusRoute中，区域存储在dbo.GEN_Area。我需要显示如下：

 Zonename1
    Areas coming under this zone in a list

 Zonename2
    Areas coming under this zone in a list
 ........

我的PHP代码是这样的：

$area = '';                                                               
$getbus = mssql_query("SELECT BusRouteID,AreaID  FROM dbo.Acc_BusRouteDetail");
       while($data_getbus = mssql_fetch_row($getbus)){ 
           $getZone = mssql_query("SELECT Busroute FROM PRTL_BusRoute 
           WHERE BusRouteID = '$data_getbus[0]'");  
           while($data_getZone = mssql_fetch_row($getZone)){
                     $zone_name =  "<h4>".$data_getZone[0]."</h4>"; 
                     }  
       $getArea = mssql_query("SELECT AreaName_1 FROM dbo.GEN_Area 
          WHERE AreaID = '$data_getbus[1]'  ORDER BY AreaName_1");
       while($data_getArea = mssql_fetch_row($getArea)){
           $area .= $data_getArea[0]."</br>";
       }
       echo $zone_name."<br/>".$area."<br/>";
   }

输出如下：

ZoneName1
      Areaname1

   ZoneName1
      AreaName1
      AreaName2

   ZoneName1
      AreaName1
      Areaname2
      AreaName3

   ZoneName2
     Areaname1

   ZoneName2
     Areaname1
     Areaname2 so on

我想知道如果可能的话，我如何选择不同的busroutes以及它下面的所有区域。我没有逻辑如何选择单个路径ID，然后选择其下的所有区域

Answer 1

我稍微更改SQL查询以立即获取所有数据，并且每次循环并打印该区域，而如果自上一行以来它已经更改，则只打印总线路径。像这样（未经测试的）代码;

$last_route = '';
$getbus = mssql_query("SELECT br.BusRoute,a.AreaName_1 FROM dbo.Acc_BusRouteDetail brd JOIN dbo.PRTL_BusRoute br ON br.busrouteid = brd.busrouteid JOIN dbo.GEN_Area a ON a.areaid = brd.areaid ORDER BY br.busroute, a.areaname_1");
while($data_getbus = mssql_fetch_array($getbus)){ 
   if($last_route != $data_getbus['BusRoute']) {
      $last_route = $data_getbus['BusRoute'];
      echo '<h4>'.$last_route.'</h4>';
   }
   echo '<br/>'.$data_getbus['AreaName_1'].'</br>';
}

选择多个列的SELECT查询，其中一列应该是不同的mssql

1 个答案: