WITH TMP AS ( SELECT TOP 100 CAST(SUM(s.total_elapsed_time) / 1000000.0 AS DECIMAL(10, 2)) AS [Total Elapsed Time in S], SUM(s.execution_count) AS [Total Execution Count], CAST(SUM(s.total_worker_time) / 1000000.0 AS DECIMAL(10, 2)) AS [Total CPU Tim…

本文转自:https://fideloper.com/laravel-raw-queries Business logic is often complicated. Because of this, we often need to write our own SQL queries. Luckily, Laravel's query builder has the tools we need to safely run such queries. A key concern when wri…

我经常会被反复问到这样的问题:”我有一个性能很差的SQL Server.我如何找出最差性能的查询?“.因此在今天的文章里会给你一些让你很容易找到问题答案的信息向导. 问SQL Server! SQL Server的一个优点是它本身能回答几乎所有你的问题,因为SQL Server在各个DMV和DMF里存储了很多故障排除信息.另一方面这也是个缺点,因为你必须知道各个DMV/DMF,还有如何把它们解释和关联在一起. 至于你的最差性能SQL Server查询的一个最重要的DMV是sys.dm_exec_…

SQL Server日常维护常用的一些脚本整理. 1.sql server开启clr权限: GO RECONFIGURE GO ALTER DATABASE HWMESTC SET TRUSTWORTHY ON ALTER AUTHORIZATION ON Database::HWMESTC TO sa; 2.查询数据库大小 Exec sp_spaceused . from dbo.sysfiles 3.数据库日志压缩 --选择需要使用的数据库 USE PIMS --将数据库模式设置为SIMPL…

原文地址: http://www.toptal.com/php/10-most-common-mistakes-php-programmers-make 译文地址:http://codecloud.net/php-2056.html Common Mistake #1: Leaving dangling array references after foreach loops Not sure how to use foreach loops in PHP? Using references i…

本文转自:https://www.mssqltips.com/sqlservertip/1917/performance-analysis-using-sql-server-2008-activity-monitor-tool/ Problem While looking through the new features and improvements in SQL Server 2008 Management Studio (SSMS) we found a potentially inte…

R2RT   Written Memories: Understanding, Deriving and Extending the LSTM Tue 26 July 2016 When I was first introduced to Long Short-Term Memory networks (LSTMs), it was hard to look past their complexity. I didn’t understand why they were designed the…

原文点击这里 目录 Install Introduction Contributors Sponsors Community Establishing connections Connection options SSL options Terminating connections Pooling connections Pool options Pool events Closing all the connections in a pool PoolCluster PoolCluster…

https://www.toptal.com/php/10-most-common-mistakes-php-programmers-make PHP makes it relatively easy to build a web-based system, which is much of the reason for its popularity. But its ease of use notwithstanding, PHP has evolved into quite a sophis…

mysql A node.js driver for mysql. It is written in JavaScript, does not require compiling, and is 100% MIT licensed. mysql       Table of Contents Install Introduction Contributors Sponsors Community Establishing connections Connection options SSL op…