关联数组中的多个 SQL 查询

Question

我有一个非常简单的问题，关于发送多个查询并将每个结果存储在关联数组中。

基本上，我已将每个查询分配到一个关联数组中。

每个查询的每个结果都进入我的多维数组$el['nameofthequery']['resultsofthequery']

//connection information
 $host = "localhost";
 $user = "root";
 $password = "";
 $database = "sghi";
 $el = array();
 $query = array();
 
 //make connection
 $server = mysql_connect($host, $user, $password) or die('Could not connect to mysql server.');
 $connection = mysql_select_db($database, $server);
 
 //query the database
 $query['mylist1'] = mysql_query("SELECT CompanyName AS label,ContactName AS value FROM suppliers") or die('Could not select database.');
 $query['mylist2'] = mysql_query("SELECT ContactTitle AS label,City AS value FROM suppliers") or die('Could not select database.');
 
 //build array of results
  
  // Check if there is any results
  if(mysql_num_rows($query['mylist1']) == 0) {
   echo "No results found";
   exit; // so exit
  }
  else {
   while( $row = mysql_fetch_assoc( $query['mylist1']) ){
    $el['mylist1'][] = $row;
   }
  }
  
  // Check if there is any results
  if(mysql_num_rows($query['mylist2']) == 0) {
   echo "No results found";
   exit; // so exit
  }
  else {
   while( $row = mysql_fetch_assoc( $query['mylist2']) ){
    $el['mylist2'][] = $row;
   }
  }
 
 //echo JSON to page
 $response = json_encode($el);
 echo $response;
 mysql_close($server);

到目前为止一切正常，但是我想知道我是否使用了最好的方法来实现这一点？

这是处理从我上面的代码生成的 json 数据的 jquery 脚本...它在一个表单中填充具有不同值的多个列表：

$.getJSON('test.php', function(result) {

    var optionsValues = '';
$.each(result['mylist1'], function(item) {
  optionsValues += '<option value="' + this.value + '">' + this.label + '</option>';
});
var options = $('#DestAirportList');
options.append(optionsValues);

    var optionsValues = '';
$.each(result['mylist2'], function(item) {
  optionsValues += '<option value="' + this.value + '">' + this.label + '</option>';
});
var options = $('#DestAirportRoomList');
options.append(optionsValues);

});

Answer 1

您可以使用一个查询并使用UNION

select .... UNION select ...