Bad Cardinality Estimates from SSMS Plans – Redux
Aaron Bertrand shares some insight about early changes to Plan Explorer that help to provide you with the most accurate information we can.
2016-04-04
2,780 reads
Additional Articles
Relational Algebra and its implications for NoSQL databases
With the rise of NoSQL databases that are exploiting aspects of SQL for querying, and are embracing full transactionality, is there a danger of the data-document model's hierarchical nature causing a fundamental conflict with relational theory? We asked our relational expert, Hugh Bin-Haad to expound a difficult area for database theorists.
2016-04-01
3,673 reads
Creating a Date Dimension in a Tabular Model
As well as its multidimensional model, SQL Server Analysis Services (SSAS) now has a tabular model of database that either runs in-memory or in DirectQuery mode. The in-memory analytics engine allows the users of Excel or Power View to base reports on tabular model objects. Having shown how to handle date-based information using the Multi-dimensional model, Dennes now turns his attention on the in-memory tabular model.
2016-03-31
4,032 reads
Getting started with the SSIS Script Task
The SSIS Script Task allows you to add functionality to your SSIS package that does not already exist with the other predefined tasks. In this article, Daniel Calbimonte looks at how to get started using the SSIS Script Task with a few examples.
2016-03-30
4,402 reads
Introduction to Protecting SQL Server with Azure Site Recovery
Microsoft cloud platform allows you to provide resiliency for your on-premises SQL Server deployments. Marcin Policht describes this functionality, available as part of the Azure Site Recovery solution.
2016-03-29
4,191 reads
SQL Server Metadata Functions: The Basics
To be able to make full use of the system catalog to find out more about a database, you need to be familiar with the metadata functions. They save a great deal of time and typing when querying the metadata. Once you get the hang of these functions, the system catalog suddenly seems simple to use, as Robert Sheldon demonstrates in this article.
2016-03-28
6,652 reads
When AUTO_UPDATE_STATISTICS Doesn't Happen
When your SQL Server database is set to have its statistics automatically updated, you will probably conclude that, whenever the distribution statistics are out-of-date, they will be updated before the next query is executed against that index or table. Curiously, this isn't always the case. What actually happens is that the statistics only gets updated if needed by the query optimiser to determine an effective query plan.
2016-03-25
4,726 reads
The One 'Security' Feature in Oracle You Probably Shouldn't Use
Oracle offers a number of security-related settings, but one could definitely create more harm than good. David Fitzjarrell looks at which parameter that is, and why.
2016-03-24
5,227 reads
Step by Step Installation of SQL Server 2014 on a New Failover Cluster
Manvendra Singh gives a step-by-step guide to installing SQL Server 2014.
2016-03-23
4,097 reads
Better Ways to Build a Database
The purpose of a database build is simple: prove that what you have in version control can successfully create a working database, and yet many teams struggle with unreliable and untested database build processes that slow down deployments and prevent the delivery of new functionality. Grant Fritchey explains how to achieve an automated and reliable database build that is only as complex as the database system it needs to create.
2016-03-22
5,439 reads
Blogs
Automatic Index Compaction
By ReviewMyDB
Index maintenance has always meant nightly jobs and a window you have to defend....
The Goldilocks problem – Materialized Views
I’m sure you’ve all heard the tale of Goldilocks and the Three Bears, but...
Monday Monitor Tips: Virtual Machine Usage and Cost
By Steve Jones
One of the things I’ve been requesting for a number of years is cost...
Forums
SQL Art, Part 4: Happy 4th of July — A British DBA's Guide to Celebrating a War We Don't Talk About
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SQL Server Still Wins
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DBCC CHECKDB Limits I
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Question of the Day
DBCC CHECKDB Limits I
When running DBCC CHECKDB on SQL Server 2025, can I specify only the Resource Database?
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