文章目录

今天例会中,作为新同学,向大家分享了自己在工作中关于SQL优化的分享(长微博)。尽管只是皮毛,但不积跬步无以至千里,不积小流无以成江海。下面给出PPT的内容。

分析浅显,大家海涵! ^.^

PPT

8b4311b1jw1evdhwe022uj20sg0lcdgm
8b4311b1jw1evdhwe3qkhj20sg0lc757
8b4311b1jw1evdhwe9ff2j20sg0lctb1-2
8b4311b1jw1evdhwe9ff2j20sg0lctb1
8b4311b1jw1evdhweeyu9j20sg0lc40j
8b4311b1jw1evdhwejgzrj20sg0lc0uj
8b4311b1jw1evdhweri7ej20sg0lcgpt
8b4311b1jw1evdhwexb0gj20sg0lc77a
8b4311b1jw1evdhwfxyvij20sg0lc413
8b4311b1jw1evdhwg1z56j20sg0lc41i
8b4311b1jw1evdhwgar78j20sg0lcadx
8b4311b1jw1evdhwgi8y7j20sg0lcwft
8b4311b1jw1evdhwgmf05j20sg0lcmy6
8b4311b1jw1evdhwgu05mj20sg0lctb9
8b4311b1jw1evdhwgwj6nj20sg0lcaan

问题

其中,有同学指出:“如果复合索引中的state字段为0的概率大于50%,可以考虑不建立state的索引;否则,反之”。

天天TB

前段时间,我们大部门TB啦!猜猜这是哪里?

IMG_20150808_105833
IMG_20150808_112821
IMG_20150808_112834
IMG_20150808_113316
IMG_20150808_113331
IMG_20150808_115516
IMG_20150808_120628

走到这里才发现,这不是跑男第二季中某一集的场地么。难怪这一路都觉得似曾相识~

Screen Shot 2015-08-19 at 23.41.36
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