Stairway Series

Stairway to SQL Server Extended Events

Stairway to SQL Server Extended Events

  • Stairway

Erin Stellato, a Principal Consultant with SQLskills.com, explores the use of Extended Events as a diagnostic data collection tool or SQL Server. She describes how to define efficient low-overhead event sessions that exploit fully the vast number of events, as well as the powerful filtering and data collection options, offered by this new event collection infrastructure. She also demonstrates simple techniques to analyze event data and identify and troubleshoot the causes of poor SQL Server performance, such as long-running queries that consume vast amounts of CPU and I/O resources. It is time to embrace Extended Events and understand all that it has to offer, and Erin's stairway is the perfect place to start.

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2015-12-01

6,018 reads

Stairway to SQL Server Security

Stairway to SQL Server Security Level 7: Security Across Databases with Cross-Database Ownership Chaining

  • Stairway Step

Sometimes you need to reach outside a database and access data and objects from multiple databases, which raises some security issues and increases the complexity of data access. In this stairway level, you’ll learn about cross-database ownership chaining so that you can reach across database boundaries securely.

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2024-05-08 (first published: )

11,161 reads

Stairway to Advanced T-SQL

Stairway to Advanced T-SQL Level 3: Understanding Common Table Expressions (CTEs)

  • Stairway Step

A CTE is a temporary result set defined by a simple query, and is used within the execution scope of a single INSERT, UPDATE, DELETE, or SELECT statement. In this article we will explore how to define and use CTE's.

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2024-04-03 (first published: )

6,296 reads

Stairway to Columnstore Indexes

Stairway to Columnstore Indexes

  • Stairway

SQL Server 2012 and later offer a very different type of index from the traditional b-tree, the in-memory columnstore index. These indexes use a column-based storage model, as well as a new 'batch mode' of query execution and can offer huge performance increases for certain workloads. But how are they built, how do they work, and why do they manage to have such a dramatic impact on performance? In this stairway, Hugo Kornelis explains all, with his usual mix of concise description and detailed demonstration.

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2015-01-22

11,725 reads

Stairway to Advanced T-SQL

Stairway to Advanced T-SQL

  • Stairway

This stairway will contain a series of articles that will expand on the T-SQL foundation that you learned in the prior two T-SQL stairways, Stairway to T-SQL DML and T-SQL Beyond the Basics. This stairway should help readers prepare for passing the Microsoft Certification exam 70-461: Querying Microsoft SQL Server 2012.

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2014-12-11

19,941 reads

Stairway to AlwaysOn

Stairway to Always On

  • Stairway

AlwaysOn is a complex set of technologies that is often mis-understood. In this Stairway you will learn about the AlwaysOn technologies, how they fit into the High Availability stack, and how to make good use of them.

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2024-07-23 (first published: )

17,320 reads

Stairway to SQL Server Virtulization

Stairway to SQL Server Virtualization

  • Stairway

Virtualization is becoming more and more common, and without an understanding how virtualization works, the DBA will have blind spots when attempting to resolving performance issues, such as reduce resource contention, or improve the backup and restore operations, and so on.

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2014-06-25

3,646 reads

Stairway to SQLCLR

Stairway to SQLCLR

  • Stairway

The possibilities for programming SQL Server platform were greatly enhanced with the addition of the SQLCLR subsystem. This allows code written in any .NET language to be incorporated into your SQL Server instance and called from a stored procedure or function. You can also create your own data types or aggregates for specialized purposes. This Stairway series will teach you how to get started writing your own CLR code and integrating it into SQL Server.

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4.33 (6)

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2013-12-27

13,802 reads

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Question of the Day

Counting Bits IV

What does this code return in SQL Server 2022+? 

select bit_count(2.4)
 

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