Question

所以，我正在为学校做一个kalender sorta事情，我试图在表中插入多行thingys，删除功能很好但是当我尝试添加功能时它不能正常工作。这是我的代码=

<?php
$connection = new mysqli('localhost','root','','calendar');

$Days = $_POST['Day'];
$Months = $_POST['Month'];
$Years = $_POST['Year'];
$Names = $_POST['Name'];

$sql = "INSERT INTO birthdays (day), (month), (year), (person) VALUES     ('$Days'), ('$Months'), ('$Years'). ('$Names')";

echo $sql;

$connection->query($sql);

//header('location:index.php');
?>

结果：

$sql = "INSERT INTO birthdays (day,month,year,person) VALUES('$Days'), ('$Months'), ('$Years'). ('$Names')";

所以它应该可以正常工作，但它并没有保存到桌面上。我也不太了解MYSQL，我认为我在插入部分做错了，我一次做多行，但不知道如何修复它。

（嗯，他在最后一页上的dates，Names etc，但效果很好）

Answer 1

正确的SQL语法就是这个：

(defun matrix-mul (matrix vector dest)
  "Multiply MATRIX by VECTOR putting the result into DEST.
Optimized for DOUBLE-FLOAT vectors and matrices"
  (declare (type (array double-float (* *)) matrix)
           (type (vector double-float *) vector dest)
           (optimize (speed 3) (debug 0) (safety 0)))
  (destructuring-bind (rows cols) (array-dimensions matrix)
   (dotimes (i rows)
     (setf (aref dest i)
           (loop for j below cols sum (the double-float
                                           (* (aref matrix i j) (aref vector j))))))))

但是你应该使用带有占位符的预准备语句，如下所示：

$sql = "INSERT INTO birthdays (day, month, year, person) VALUES ($Days, $Months, $Years, '$Names')";

MYSQL，插入工程但它不会连接

1 个答案: