MS SQL 监控数据/日志文件增长
接下来，我们创建存储过程，负责来收集、统计这些数据库的文件的相关信息。 关于环比/同比,正常情况一般是: 环比: (指标当前值 - 指标值(上个月同一天))/ 指标值(上个月同一天) 。 同比: (指标当前值 - 指标值(去年月同一天))/ 指标值(去年月同一天) 。 其实
接下来，我们创建存储过程，负责来收集、统计这些数据库的文件的相关信息。关于环比/同比,正常情况一般是:
环比: (指标当前值 - 指标值(上个月同一天))/ 指标值(上个月同一天) 。
同比: (指标当前值 - 指标值(去年月同一天))/ 指标值(去年月同一天) 。
其实如果关注每天的数据文件变化情况，这个代码里面的环比、同比其实意义不大，其实我们可以这样定义环比、同比：
环比： （指标当前值 - 指标值（昨天）)/指标值（昨天）。
同比： （指标当前值 - 指标值 （上个月））/指标值（上个月）
当然，你也可以把这四个指标都加上，对比参考，侧重点不同而已。
存储过程
顺便吐槽一下：由于前两年一直使用ORACLE数据库，很少接触SQL SERVER，在实现上面功能的时候，美国服务器，我深深的体会到了ORACLE和SQL SERVER的巨大差距，如果用PL/SQL实现，网站空间，那非常方便快捷，香港服务器，但是用T-SQL让我遇到了几个相当痛苦地方，下面顺便记录对比一下吧：
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