尝试从提示符解析时出现 SQL 解析错误答案

【问题标题】：SQL Parsing Error when trying to parse from prompt尝试从提示符解析时出现 SQL 解析错误
【发布时间】：2022-01-16 00:23:23
【问题描述】：

我正在尝试构建一个向 SQL 表添加新行的函数，但是当我运行它时，我得到以下信息：

    const localErr = new Error();
                     ^

Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '`title` = 'Red', `sala
ry` = '50000', `department_id` = 3' at line 4
    at PromiseConnection.query (C:\Users\corri\dev\classwork\Module-12\challenge\employee-tracker-M12HW\node_modules\mysql2\promise.js:93:22)
    at DB.addRole (C:\Users\corri\dev\classwork\Module-12\challenge\employee-tracker-M12HW\db\index.js:62:42)
    at addRole (C:\Users\corri\dev\classwork\Module-12\challenge\employee-tracker-M12HW\server.js:103:14)
    at processTicksAndRejections (node:internal/process/task_queues:96:5) {
  code: 'ER_PARSE_ERROR',
  errno: 1064,
  sql: 'INSERT INTO \n' +
    '                role (title, salary, department_id)\n' +
    '            VALUES \n' +
    "                `title` = 'Red', `salary` = '50000', `department_id` = 3",
  sqlState: '42000',
  sqlMessage: "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '`title` = 'Red
', `salary` = '50000', `department_id` = 3' at line 4"
}

这是数据库：

CREATE TABLE role (
id INT AUTO_INCREMENT PRIMARY KEY,
title VARCHAR(30) NOT NULL,
salary DECIMAL (10, 2),
department_id INT,
CONSTRAINT fk_department FOREIGN KEY (department_id) REFERENCES department(id) ON DELETE CASCADE

);

这是我的 index.js 调用：

    addRole(role) {
    return this.connection.promise().query(
        `INSERT INTO 
            role (title, salary, department_id)
        VALUES 
            ?`, role
    )
};

这里是函数：

async function addRole() {
// Pull options so user can select a department to correspond with this role
const [department] = await db.viewAllDepartments();
const departmentChoices = department.map(({ id, name }) => ({
    name: name,
    value: id
}));
const role = await inquirer.prompt([
    {
        type: 'input',
        name: 'title',
        message: 'What is the title of the role?'
    },
    {
        type: 'input',
        name: 'salary',
        message: 'what is the salary of the role?'
    },
    {
        type: 'list',
        name: 'department_id',
        message: 'Which department is this role a part of?',
        choices: departmentChoices
    }
]);
await db.addRole(role);
console.log(`Added ${role.name} to the database`);
mainMenu();
}

我已经尝试调整它，但我无法弄清楚是什么解析不正确。

【问题讨论】：

标签： javascript mysql sql parsing

【解决方案1】：

似乎您缺少括号（）当插入 ... 值时，您应该将它们放在 ( 和 ')' 中它不是一个设置命令。

更新：语句本身也是错误的=不是ansi sql。

这是错误的：

INSERT INTO role (title, salary, department_id) VALUES title = 'Red', salary = '50000', department_id = 3"

应该是：

INSERT INTO role (title, salary, department_id) VALUES ('Red', '50000', 3)

【讨论】：

括号确实解决了错误，但现在它只是输入空：（屏幕截图）share.getcloudapp.com/mXuP0YWA
这是错误的：INSERT INTO 角色（职务、薪水、部门 ID）值 title = 'Red'、salary = '50000'、department_id = 3" 这是有效的：INSERT INTO 角色（职务、薪水、部门 ID）VALUES（'Red'、'50000'、3）
我只是将询问者提示中的答案输入数据库：await db.addRole(role);当我 console.log(role) 我得到 { title: 'Red', Salary: '850000', department_id: 2 } 我不确定等号来自哪里。