Shelley Doll finishes her coverage of SQL data types with an overview of datetime and interval data types. Learn more about the basic syntax of these standard SQL types.

SQL databases have constraints on data types and consistency. NoSQL does away with them for the sake of speed, flexibility, and scale.

Microsoft SQL Server 2005 Service Pack 1, now available, packs a few surprises, as well as the data mirroring and Express management perks that the company has promised.