Instead, we've written it for users and programmers who want to improve SQL performance, no matter what brand of SQL they use. In this book, you'll find tuning tips for common situations. Topics that will give
1. SQL Performance Tuning team recommends using COUNT(1) instead COUNT(*) for SQL query performance optimization. Example: --Do not use: SELECT COUNT(*) FROM master; --Use: SELECT COUNT(1) FROM master; 2. Never compare NULL with NULL. Consider that NULL is not like an empty string or...
When tuning, we start with the hardware and work our way up the stack, finishing with the application's SQL queries. The workload-dependent aspect of tuning gets higher as we move up the stack, so we begin with the most general aspects and move on to the most workload-specific aspect...
SQL performance tuning can be an incredibly difficult task, particularly when working with large-scale data where even the most minor change can have a dramatic (positive or negative) impact on performance. In mid-sized and large companies, most SQL performance tuning will be handled by a Datab...
Issue/Introduction SQL Server Implementation Best Practices and Performance Tuning for IT Management Suite (ITMS)Environment ITMS 8.xResolution This article consolidates best practices for SQL Server 2005 or later server implementation. It also presents a simplistic process that can be used to tune ...
The general goal of SQL performance tuning is to decrease response time (the time to complete a specified workload), increase throughput (the amount of work that can be completed in a specified time), and generate the query which will return the desired effect in the minimum time through ...
Many new SQL performance tuning features are added to SQL Server in each new version. In some cases, these features might boost our query performance dramatically. For this reason, it will always be useful for us to be informed about these new features. Such as the following features are ver...
For example, an EXISTS subquery can return TRUE upon seeing the first qualifying row. Note The SQL Server Compact query processor always rewrites the IN subquery to use JOIN. You do not have to try this approach with queries that contain the IN subquery clause. For example, to determine all...
30 分钟快快乐乐学 SQL Performance Tuning 有些程序员在撰写数据库应用程序时,常专注于 OOP 及各种 framework 的使用,却忽略了基本的 SQL 语句及其「性能 (performance)优化」问题。版工曾听过台湾某半导体大厂的新进程序员,所组出来的一段 PL/SQL 跑了好几分钟还跑不完;想当然尔,即使他的 AJAX 及ooxx框架用...
Call our SQL Tuning Server Performance Experts for solutions to your performance problems. SQL Server- Performance for Large Enterprise Solutions Microsoft SQL Server provides a comprehensive data platform that can grow with your business. SQL Server is packed with technologies to scale-up individual ...