峰雪

摘要：explain的语法如下：explain [extended] select … from … where …如果使用了extended，那么在执行完explain语句后，可以使用show warnings语句查询相应的优化信息。比如我们执行 select uid from user where uname=’scofield’ order by uid 执行结果会有| id | select_type | table | type| possible_keys | key | key_len | ref | rows | Extra |这些东西。其中 table 表示是哪个表的数据。type 阅读全文

摘要：先看一下官方对此方法的介绍官方地址 http://api.jquery.com/animate/.animate( properties, [duration,] [easing,] [complete] ) version added: 1.0properties A map of CSS properties that the animation will move toward.duration A string or number determining how long the animation will run.easing A string indicating which e 阅读全文