Question

我正在尝试使用PDO预处理语句将Excel文件中的数据插入Access 2007数据库。代码试图做的是检查Excel工作表中的值是否存在于数据库中，如果不存在则添加但不执行任何操作

以下是代码：

    $conn = connect_to_impact();

//******************************************

//select statement

$select =  'SELECT < ? FROM < ?';

$select_query = $conn->prepare($select);



  for ($h = 2; $h<count($clmn[0]); $h++){
      $value = $clmn[0][$h];


    // query execution

   $select_query->execute(array($clmn[0][1], $clmn[0][1]));

    $impact_no_result = $select_query->fetchAll();


   //query result in multidimensional array

   $impact_no_arr = impact_no_select($impact_no_result);

   // create an indexed array of results

   $impact_no_r = impact_no_indexed($impact_no_arr, $clmn[0][1]);


 if(is_null($impact_no_r)){

           $insert_impact_no = 'INSERT INTO < ? (< ?)    VALUES (< ?)';
    $simple_arr = [$clmn[0][1], $clmn[0][1], $value];
       $insert_query = $conn->prepare($insert_impact_no);
              $insert_query->execute($simple_arr);
              }

   // then if the value in the column is not in the indexed array insert it

     elseif(!in_array($value, $impact_no_r)){
       $insert_impact_no = 'INSERT INTO < ? (< ?)    VALUES (< ?)';
    $simple_arr = [$clmn[0][1], $clmn[0][1], $value];
      $insert_query = $conn->prepare($insert_impact_no);
        $insert_query->execute($simple_arr);

     }
     }

Answer 1

实际上，替换不能用于PDO预处理语句中的表名和列名。这是解决问题的代码

$conn = connect_to_impact();

//******************************************
//select statement


$select = "SELECT ". $clmn[0][1] . " FROM " . $clmn[0][1];



//repeat for each row the the excel sheet starting from row 2
for ($h = 2; $h<count($clmn[0]); $h++){
//take each value from each row from column A
  $value = $clmn[0][$h];
// query execution
$impact_no_result = $conn->query($select);
if($impact_no_result){
  $impact_no_result_ass = $impact_no_result->fetchAll();
}


//if there is no result in the select query
if($impact_no_result == false){
$insert_impact_no = "INSERT INTO ". $clmn[0][1] . "(" . $clmn[0][1] . ") " . "VALUES ('" . $value . "');";
$execute = $conn->query($insert_impact_no);
}
//if there is a result in the select query

else {
//put query result in  array

$impact_no_arr = impact_no_select($impact_no_result_ass);
//if value is not in array insert it
if(!in_array($value, $impact_no_arr)){
  $insert_impact_no = "INSERT INTO ". $clmn[0][1] . "(" . $clmn[0][1] . ") " . "VALUES ('" . $value . "');";
$execute = $conn->query($insert_impact_no);
}
}
}

PHP pDO准备在Access 2007中插入数据的语句

1 个答案: