update

src/old/db.js

@@ -0,0 +1,30 @@
+//引入MySQL
+const mysql = require('mysql');
+
+async function query(sql = "select * from answer;") {
+    //通过MySQL中方法创建链接对象
+    var connection = mysql.createConnection({
+        charset: 'utf8mb4',
+        host: 'localhost',
+        user: 'root',
+        password: 'root',
+        port: 3306,
+        database: 'answerbook'
+    });
+    //开始连接
+    connection.connect();
+    //执行SQL语句 (添加、删除、更新、查询)
+    connection.query(sql, (err, result) => {
+        if (err) {
+            console.error('err', err);
+            return;
+        }
+        console.log('result', result);
+    })
+    //最后需要关闭连接
+    connection.end();
+}
+
+module.exports = {
+    query: query,
+}