The only way to guarantee that your business rules are always enforced for all your data is by using constraints. Learn how to use them to enforce business rules in the database.
The benefits of SQL Server 2005's new snapshot isolation feature are well known, but SQL Server developers also need to understand the downstream ramifications of snapshot isolation.
The same ANSI Standard SQL query can run against identical data on SQL Server and Oracle and return different results. So just because your application issues ANSI standard SQL, don't assume it's portable.
Some solutions for implementing business rules can allow invalid data to get into the database. Find out where the loopholes lie in these all-too-common approaches.
Using an index on a computed column, you can implement complex business rules or just give your SQL Server queries a performance boost.
Learn coding techniques to tweak your SQL queries so that SQL Server sorts less data and returns much faster.
Index covering is a quick and easy solution to many query performance problems. By just adding a column or two to an index you can significantly boost a query's performance.