cnpm install mysql

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for users
-- ----------------------------
DROP TABLE IF EXISTS `users`;
CREATE TABLE `users` (
 `Id` int(11) NOT NULL AUTO_INCREMENT,
 `CreateTime` datetime NOT NULL,
 `Header` varchar(255) DEFAULT NULL,
 `NickName` varchar(255) DEFAULT NULL,
 `Sex` int(11) NOT NULL,
 PRIMARY KEY (`Id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

//引入mysql模块
var mysql = require("mysql");
//创建连接
var connection = mysql.createConnection({
  host: "localhost",
  port: "3306",
  user: "root",
  password: "abcd",
  database: "it_odd_o",
});
//开始连接
connection.connect(function (err) {
  if (err) {
    console.log("[connect] - " + err);
    return;
  } else {
    console.log("connection connect successed!");
  };
});
//执行sql语句
connection.query("select 1+1 as result", function (err, rows, fields) {
  if (err) {
    console.log("[query] - " + err);
  } else {
    console.log("result is " + rows[0].result);
  };
});
//向user表中插入数据
var userAddSql = "insert into users(createTime,header,nickName,sex) value(now(),?,?,1);";
var userAddSql_params = ["1.jpg", "wolfy"];
//执行sql语句
connection.query(userAddSql, userAddSql_params, function (err, result) {
  if (err) {
    console.log("[insert] - " + err);
  } else {
    console.log(result);    
  };
});
//断开连接
connection.end();

//改
var userUpdateSql="update users set header=? where id=?;";
var userUpdateSql_params=["2.jpg",2];
connection.query(userUpdateSql, userUpdateSql_params, function (err, result) {
  if (err) {
    console.log("[update] - " + err);
  } else {
    console.log(result);    
  };
});