What Is a Cost-Based Optimizer?
When you execute a query, the database server has to figure a lot of things out. For even the simplest queries, there are usually several possible ways to get the job done.
2021-10-18
Additional Articles
Model and Log Trend Reversals for Time Series Data in SQL Server
This tip demonstrates models for detecting the start of periods of rising or falling financial securities prices based on exponential moving averages. The demonstration is simplified because it relies on a log to keep track of time series values as well as exponential moving averages with different period lengths.
2021-10-15
Monitoring Large Estates at BMW
BMW have been monitoring their SQL Server estate for more than 7 years, but with evolving technology and circumstances, monitoring also needs to change and grow. Join Tony Maddonna in conversation with Redgate's James King, to discover how BMW are handling the challenges.
2021-10-15
Database technology trends
Big data can be risky, which is why you need great estate management. Join Matt Schmelzer, Data Systems and Automation - IT, and Jonathan Holck, IT Associate, from Artisan Partners in discussion with Microsoft MVP Grant Fritchey to learn how they implemented a successful infrastructure and what tools they need to support their growing estate.
2021-10-13
SSRS IIF, Switch and Choose Functions for Dynamic and Appealing Reports
Learn how to use IIF, Switch and Choose logical functions in SSRS reports to make your reports more dynamic and more appealing to report users.
2021-10-13
Building an ETL with PowerShell
There are many ways to load data into a SQL Server database. In this article, Greg Moore demonstrates how to get PowerShell to do more of the work.
2021-10-11
State of Database Monitoring Report 2
We’re sharing the results of our State of Database Monitoring survey in four insights reports this year – and the second one is out now. In The value of a monitoring tool for the entire organization you’ll learn why more businesses than ever are using a monitoring tool and how doing so can help the entire business to reduce costs, enhance security and collaborate more efficiently. DBAs - download a copy and send it to your boss, today!
2021-10-11
Databricks Delta Change Data Feed
In this article we cover how to implement a batch Databricks Change Data Feed process through an end-to-end exercise.
2021-10-08
Estimating Data Compression Savings in SQL Server
This video demonstrates a set of queries for estimating data compression savings in SQL Server. It also covers how to make an informed decision on whether data compression makes sense for your data and workload or not.
2021-10-08
Learning the SQL GROUP BY Clause
Learn about the various ways to use the GROUP BY command to summarize and rollup query results. We look at the basics with examples as well as using group by rollup, cube and grouping sets.
2021-10-06
Blogs
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Question of the Day
The Max PK Length
If I create a multiple column Primary Key constraint, what is the most number of bytes I can include in the constraint?
See possible answers