删除为空或null的项目- JS - MYSQL - PHP

function deleteEmptyItems(data) {
  for (var i = 0; i < data.length; i++) {
    if (data[i] === null || data[i] === "") {
      data.splice(i, 1);
      i--;
    }
  }
  return data;
}

// 示例用法
var data = [1, null, 3, "", 5];
var result = deleteEmptyItems(data);
console.log(result); // 输出 [1, 3, 5]

<?php
// 连接数据库
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";
$conn = new mysqli($servername, $username, $password, $dbname);

// 检查连接是否成功
if ($conn->connect_error) {
  die("连接失败: " . $conn->connect_error);
}

// 删除为空或null的项目
$sql = "DELETE FROM table_name WHERE column_name IS NULL OR column_name = ''";
if ($conn->query($sql) === TRUE) {
  echo "删除成功";
} else {
  echo "删除失败: " . $conn->error;
}

// 关闭数据库连接
$conn->close();
?>

DELETE FROM table_name WHERE column_name IS NULL OR column_name = '';