10 2019 档案

摘要：package cns; public class person { String name="无名"; String sex="man"; //无参构造 public person(){ name="山姆"; sex="男"; System.out.println("执行构造方法"); } //一 阅读全文

摘要：SELECT OrderID FROM orders ORDER BY OrderDate DESC LIMIT 2;SELECT OrderID FROM (SELECT OrderID FROM orders ORDER BY OrderDate DESC LIMIT 2)as x;SELECT 阅读全文

摘要：/* Navicat Premium Data Transfer Source Server : rootto Source Server Type : MySQL Source Server Version : 50562 Source Host : localhost:3306 Source S 阅读全文