摘要: http://blog.csdn.net/yangyu112654374/article/details/4251624比如一条sql语句select * from TABLE1 where A1=1 and A2=2 and A3=3 order by A4 ASC;优化后是这样: select ... 阅读全文
posted @ 2015-03-16 17:43 斯世轻尘 阅读(889) 评论(0) 推荐(0) 编辑