Previous article was on10 Ways To Destroy A SQL Databasethat sort of teaches you what mistakes many company might make on their database that will eventually lead to a database destroy. In this article, you will get to know 15 ways to optimize your SQL queries. Many ways are common to ...
9 best practices for faster SQL queries Retrieve only the columns you need Use CASE instead of UPDATE for conditional column updates Keep large-table queries to a minimum Pre-stage your data Perform deletes and updates in batches Use temp tables to improve cursor performance Use table-valued fun...
2)应该尽量把字段设置为NOT NULL 2、使用连接(JOIN)来代替子查询(Sub-Queries) MySQL从4.1开始支持SQL的子查询。这个技术可以使用SELECT语句来创建一个单列的查询结果,然后把这个结果作为过滤条件用在另一个查询中。例如,我们要将客户基本信息表中没有任何订单的客户删除掉,就可以利用子查询先从销售信息表中将所有发...
There are, of course, times when you need to perform a LEFT JOIN and use NULL values. But they are not a solution for all occasions. Changing the way you structure your SQL queries can mean the difference between a report that takes minutes to run and one that takes only seconds. Somet...
Optimize SQL Queries by Using Aliases When joining tables in SQL, we often use aliases to shorten table names. Consider this query joining order lines (details) with orders inside the database:May 27, 2008 Replacing / Adding Line Breaks in GridView Text The GridView is a powerful control...
There are, of course, times when you need to perform a LEFT JOIN and use NULL values. But they are not a solution for all occasions. Changing the way you structure your SQL queries can mean the difference between a report that takes minutes to run and one that takes only seconds. Somet...
Weintroduced the Azure SQL family of database servicesto help businesses cost-effectively adapt and scale to rapidly changing conditions. Here are the top eight ways you can optimize your data spend, with savings available wherever you are in your digital transformation journey. ...
Setting the compatibility level of a database allows you to control the version of the SQL Server database, affecting how the database behaves.
To optimize available memory, data is moved back and forth between RAM and disk-based virtual memory in a process known as paging. The more RAM the server machine has, the less paging will occur, and that’s good because paging is extremely inefficient and causes the machine to run much ...
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