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Operator of the Week - Lazy Spool

Continuing to illuminate the depths of SQL Server's Query Optimizer, Fabiano shines a light on the sixth major Showplan Operator on his list: the Lazy Spool. What does the Lazy Spool do that's so special, how does the Query Optimizer use it, and why is it so Lazy? Fabiano Amorim explains all.

2010-06-28

2,774 reads

External Article

Making your SQL Server database changes backward compatible: Adding a new column

As multi-tier architectures grow over time, it is often challenging to coordinate those changes across the data, logic and presentation tiers. Unless planned and implemented carefully, an act as simple as adding a column to a table can grind all of the components of your application to a halt. While some of us have comfortable 12-hour maintenance windows every weekend, many of us are bound by service level agreements that are much more strict. So we must find ways to introduce fixes and new features with zero downtime, and without requiring every single component to be refactored at the same time.

2010-06-23

3,366 reads

External Article

Creating XML in SQL Server

XML has become a common form of representing and exchanging data in today's information age. SQL Server introduced XML-centric capabilities in SQL Server 2000. That functionality has been expanded in later releases. One aspect of working with XML is creating XML from relational data, which is accomplished utilizing the FOR XML clause in SQL Server.

2010-06-22

4,464 reads

External Article

Configure Windows Firewall for SQL Server 2008 Integration Services in Windows Server 2008 R2

I have installed SQL Server 2008 on Windows Server 2008 R2 and I am unable to connect to SQL Server 2008 Integration Services Instance from SQL Server 2008 Management Studio which is installed on another remote server. As I am new to Windows Server 2008 R2 it would be great if you can let me know the step by step approach to enable the default port of SQL Server 2008 Integration Services in Windows Firewall for user connectivity.

2010-06-21

3,201 reads

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Question of the Day

String Similarity I

On SQL Server 2025, when I run this, what is returned?

SELECT EDIT_DISTANCE_SIMILARITY('SQL Server', 'MySQL')

See possible answers