SQL命令分为多个php行

Question

我必须拆分这个SQL命令,现在我有大量引号的问题.有人可以帮忙吗？(我正在尝试动态地为OUTFILE分配一个文件名,该文件必须包含当前时间戳作为文件名的一部分).谢谢.

<?php 

  $sql_query = "SELECT @myCommand := concat("'SELECT UNIX_TIMESTAMP( TIMESTAMP( CURDATE( ) , HalfHourTime ) ), 0, 0, 0, 0 '";
  $sql_query =$sql_query . into OUTFILE 'C:/wamp/www/myApp/services/csv/filename-", 'DATE_FORMAT(now(),"%Y%m%d-%H%i%s")', '.csv' "' ';
  $sql_query =$sql_query . FIELDS TERMINATED BY ','  ';
  $sql_query =$sql_query . LINES TERMINATED BY '\n'';
  $sql_query =$sql_query .FROM timeintervals_halfhours';
  $sql_query =$sql_query . ');";
  $sql_query =$sql_query . "PREPARE stmt FROM @myCommand; ";
  $sql_query =$sql_query . "EXECUTE stmt;";

  define("DATABASE_SERVER", "localhost");
  define("DATABASE_USERNAME", "root");
  define("DATABASE_PASSWORD", "");
  define("DATABASE_NAME", "dataR");

  $con = mysqli_connect(DATABASE_SERVER, DATABASE_USERNAME, DATABASE_PASSWORD, DATABASE_NAME);
  $selected_db = mysql_select_db(DATABASE_NAME, $con);     

  $result = mysql_query($sql_query);

  $temp = mysql_fetch_array($result);
?>

Answer 1

不要拆分任何东西,空格是你的朋友(特别是8个字符的引线,缩进增量为4)

$sql = 'SELECT *
        FROM `table`
        WHERE `table`.`field` = :param';

按照建议,使用准备好的陈述; 过渡到PDO.