1. http://msdn2.microsoft.com/en-us/library/ms130214(SQL.90).aspx (SQL Server 2005 Books Online)
2. http://www.sqltree.com/(Collection of all T-SQL Commands at One Place)
3. http://www.techinterviews.com/?p=161 (SQL Server interview questions)
4. http://vyaskn.tripod.com/(SQL Server Articles)
5. http://blog.sqlauthority.com/best_top_sql_server_blog_all_post/(SQL Server Blog & Articles)
6. http://www.microsoft.com/sql/prodinfo/features/compare-features.mspx(SQL Server 2005 Features Comparison)
7. http://msdn2.microsoft.com/en-us/library/bb431893.aspx(SQL Server Magazine)
8. http://www.sqlteam.com/(SQL Server Articles & Code)
9. http://www.microsoft.com/downloads/details.aspx?familyid=be6a2c5d-00df-4220-b133-29c1e0b6585f&displaylang=en(Download SQL Server 2005 Books)
10. http://www.microsoft.com/downloads/details.aspx?FamilyId=06616212-0356-46A0-8DA2-EEBC53A68034&displaylang=en(Northwind and pubs Sample Databases)
Soruce: MS forum