Helpful and informative online resources for Microsoft SQL Server
 
Blogs:

SQLblog.com
 
SQLSkills
 
SQLPerformance.com
 
Brent Ozar Unlimited
 
SQL Server Blog List at Microsoft Technet
 
 
Videos:

SQL Server 2008 Microsoft Certified Master (MCM) Readiness Videos
 
SQL Server "How Do I?" Videos
 
 
Utilities:

SQL Load Genrator
http://sqlloadgenerator.codeplex.com/

 
E-Books:

Performance Tuning with SQL Server Dynamic Management Views, Louis Davidson and Tim Ford
http://assets.red-gate.com/community/books/assets/eBook_Performance_Tuning_Davidson_Ford.pdf

Introducing Microsoft SQL Server 2012
http://blogs.msdn.com/b/microsoft_press/archive/2012/03/15/free-ebook-introducing-microsoft-sql-server-2012.aspx

Introducing Microsoft SQL Server 2008 R2
http://blogs.msdn.com/b/microsoft_press/archive/2010/04/14/free-ebook-introducing-microsoft-sql-server-2008-r2.aspx

 
 
Communities:

Database Administrators Stack Exchange
http://dba.stackexchange.com/

Microsoft SQL Server Connect and Forums
http://connect.microsoft.com/SQLServer

 
Code and Database Samples:

SQL Server Samples at CodePlex
http://sqlserversamples.codeplex.com/

 

Wikis, Tutorials and Online Training:

SQL Server 2012 Developer Training Kit Content
http://social.technet.microsoft.com/wiki/contents/articles/6976.sql-server-2012-developer-training-kit-content.aspx

SQL Server 2012 Developer Training Kit BOM
http://social.technet.microsoft.com/wiki/contents/articles/6982.sql-server-2012-developer-training-kit-bom.aspx?PageIndex=2

Introduction to Development with SQL Server
http://social.technet.microsoft.com/wiki/contents/articles/932.introduction-to-development-with-sql-server.aspx

SQL Server Developer Resources
http://social.technet.microsoft.com/wiki/contents/articles/984.sql-server-developer-resources.aspx

Tutorials for SQL Server 2014 in Books Online
http://msdn.microsoft.com/en-us/library/hh231699(v=sql.120).aspx

Tutorials for SQL Server 2012 in Books Online
http://msdn.microsoft.com/en-us/library/hh231699(v=sql.110).aspx

Tutorials for SQL Server 2008 R2 in Books Online
http://msdn.microsoft.com/en-us/library/ms167593(v=sql.105).aspx

Tutorials for SQL Server 2008 in Books Online
http://msdn.microsoft.com/en-us/library/ms167593(v=sql.100).aspx

Tutorials for SQL Server 2005 in Books Online
http://msdn.microsoft.com/en-US/library/ms169620(v=sql.90).aspx

 
 
Product Documentation:

Microsoft SQL Server 2014 Books Online
http://msdn.microsoft.com/en-us/library/ms130214(v=sql.120).aspx

Microsoft SQL Server 2012 Books Online
http://msdn.microsoft.com/en-us/library/ms130214(v=sql.110).aspx

Microsoft SQL Server 2008 R2 Books Online
http://msdn.microsoft.com/en-us/library/ms130214(v=sql.105).aspx

Microsoft SQL Server 2008 Books Online
http://msdn.microsoft.com/en-us/library/ms130214(v=sql.100).aspx

Microsoft SQL Server 2005 Books Online
http://msdn.microsoft.com/en-us/library/ms130214(v=sql.90).aspx

Microsoft SQL Server 2000 Books Online
http://msdn.microsoft.com/en-us/library/dn197860(v=sql.10).aspx