// DivTest.h // 异常的处理 // // Created by ma c on 15/8/11. // Copyright (c) 2015年. All rights reserved. // #import <Foundation/Foundation.h> @interface DivTest : NSObject @property(nonatomic,assign)CGFloat x; @property(nonatomic,assign)CGFloat y; @prop
[抄题]: Given an integer array, you need to find one continuous subarray that if you only sort this subarray in ascending order, then the whole array will be sorted in ascending order, too. You need to find the shortest such subarray and output its len
前言 本节我们开始讲讲这一系列性能比较的终极篇IN VS EXISTS VS JOIN的性能分析,前面系列有人一直在说场景不够,这里我们结合查询索引列.非索引列.查询小表.查询大表来综合分析,简短的内容,深入的理解,Always to review the basics. IN VS EXISTS VS JOIN性能分析 我们继续创建测试表,如下 CREATE SCHEMA [compare] CREATE TABLE t_outer ( id INT NOT NULL PRIMARY KEY,