使用mysql的Discord.js (查询，如果不是，则将消息发送到通道)

const Discord = require('discord.js');
const mysql = require('mysql2');

const client = new Discord.Client();
const connection = mysql.createConnection({
  host: 'your_mysql_host',
  user: 'your_mysql_username',
  password: 'your_mysql_password',
  database: 'your_mysql_database',
});

client.on('message', (message) => {
  if (message.content.startsWith('!query')) {
    const query = message.content.slice(7); // 获取查询语句（假设用户发送的消息为 "!query SELECT * FROM users"）
    
    connection.query(query, (error, results) => {
      if (error) {
        message.channel.send('查询出错，请重试！');
        console.error(error);
      } else {
        if (results.length > 0) {
          // 将查询结果发送到通道
          message.channel.send(`查询结果：\n${JSON.stringify(results)}`);
        } else {
          message.channel.send('查询结果为空！');
        }
      }
    });
  }
});

client.login('your_discord_bot_token');