摘要: https://explainextended.com/2009/07/16/inner-join-vs-cross-apply/ 阅读全文
posted @ 2016-10-08 21:19 RichardWong 阅读(166) 评论(0) 推荐(0)
摘要: JQuery通过获取各个元素的标签,id,Class 来设置或获取值The element Selector$("p")The #id Selector$("#ww")The .Class Selector$(".Class") 阅读全文
posted @ 2014-11-05 22:35 RichardWong 阅读(113) 评论(0) 推荐(0)
摘要: --两次对表A查询效率较低select top 10 * from A where ID not in (select top 30 ID from A)--外层查询没有对表A查询,效率大有提高select top 10 * from (select top 40 * from A order by... 阅读全文
posted @ 2014-11-05 22:31 RichardWong 阅读(197) 评论(0) 推荐(0)