用于过滤记录的PHP PDO语句

我正在使用 PHP PDO通过JSON将对象检索到iOS应用程序.
有一个包含事件对象的数据库表.它有三个字段来存储日,月和年.数据库的所有者不希望在日期字段中存储日期,这意味着我必须处理它.

该应用程序发送带有参数的URL,如下所示：

http://..hidden domain./myfile.php?dia_inicio=16&dia_final=15&mes_inicio=11&mes_final=12&ano_inicio=2014&ano_final=2015

这意味着我正在寻找从16Nov2014到15Dec2015的活动.

这是我的PHP代码：

$sql = 'SELECT * FROM tbagenda  WHERE  (dia_evento => :di AND mes_evento = :mi AND ano_evento = :ai) OR (dia_evento <= :df AND mes_evento = :mf AND ano_evento = :af) ';

    // use prepared statements,even if not strictly required is good practice
    $stmt = $dbh->prepare( $sql );
    $stmt->bindParam(':di',$dia_inicio,PDO::PARAM_INT);
    $stmt->bindParam(':df',$dia_final,PDO::PARAM_INT);
    $stmt->bindParam(':mi',$mes_inicio,PDO::PARAM_INT);
    $stmt->bindParam(':mf',$mes_final,PDO::PARAM_INT);
    $stmt->bindParam(':ai',$ano_inicio,PDO::PARAM_INT); 
    $stmt->bindParam(':af',$ano_final,PDO::PARAM_INT);
    // execute the query
    $stmt->execute();

    // fetch the results into an array
    $result = $stmt->fetchAll( PDO::FETCH_ASSOC );

    // convert to json
    $json = json_encode( $result );

    // echo the json string
    echo $json

我应该如何更改我的声明以使其适用于以下日期：16Nov2014至28Nov2014(同月),16Nov2014至5Dec2014(不同月份,同年)和16Nov2014至02May2015(不同年份)？

稍后再加：

iOS日志显示发送到PHP文件的URL：

recuperar_eventos_dia.php?dia_inicio=11&dia_final=26&mes_inicio=11&mes_final=11&ano_inicio=2014&ano_final=2014

PHP部分：

$start = "$ano_inicio-$mes_inicio-$dia_inicio";
$end = "$ano_final-$mes_final-$dia_final";

// In the SQL,concatenate the columns to make a YYYY-MM-DD date string
// and cast it to a MySQL DATE type.
// That makes it possible to use BETWEEN
$sql = 'SELECT 
  *
FROM tbagenda  
WHERE STR_TO_DATE(CONCAT_WS('-',ano_evento,mes_evento,dia_evento),"%Y-%m-%d") 
     BETWEEN :start AND :end';

// Bind and execute the statement with 2 parameters:
$stmt = $dbh->prepare( $sql );
$stmt->bindParam(':start',$start,PDO::PARAM_STR);
$stmt->bindParam(':end',$end,PDO::PARAM_STR);
$stmt->execute();

// fetch,etc...
$result = $stmt->fetchAll( PDO::FETCH_ASSOC );

        // convert to json
        $json = json_encode( $result );

        // echo the json string
        echo $json;

现在来自表tbagenda的截图：

// Begin by concatenating the input values into single date strings YYYY-MM-DD
$start = "$ano_inicio-$mes_inicio-$dia_inicio";
$end = "$ano_final-$mes_final-$dia_final";

// In the SQL,concatenate the columns to make a YYYY-MM-DD date string
// and cast it to a MySQL DATE type.
// That makes it possible to use BETWEEN
$sql = "SELECT * 
        FROM tbagenda  
        WHERE STR_TO_DATE(CONCAT_WS('-','%Y-%m-%d') 
          BETWEEN :start AND :end";

// Bind and execute the statement with 2 parameters:
$stmt = $dbh->prepare( $sql );
$stmt->bindParam(':start',etc...
$result = $stmt->fetchAll( PDO::FETCH_ASSOC );

// strtotime() would return false for invalid date strings...
if (strtotime($start) && strtotime($end)) {
  // The dates are valid,and so you can proceed with the query
  $sql = 'SELECT.....';
}