SQL Server 2008 Enterprise Edition

A comprehensive data management and business intelligence platform
SQL Server 2008 Enterprise Edition provides enterprise-class scalability, data warehousing, advanced analytics, and security for running business-critical applications. With this edition, you can consolidate servers and perform large-scale online transactional processing and reporting.
Manage large, growing tables more effectively

Reasons to buy
- High availability: Ensure business continuity with technologies that protect your data against costly human errors, and minimize disaster-recovery downtime.
- Security: Address privacy and compliance requirements with built-in features that protect your data against unauthorized access.
- Business intelligence: Easily query and analyze large amounts of data in your data warehouse and data marts to transform it into business insight.
- Performance and scalability: Deliver an infrastructure that has a proven record in handling large amounts of data and critical enterprise workloads.
- Manageability: Manage your infrastructure with automated diagnostics, tuning, and configuration to reduce operational costs while reducing maintenance and managing data.

System requirements
For detailed system requirements, see the Hardware and Software Requirements for Installing SQL Server 2008 page.
http://msdn.microsoft.com/en-us/library/ms143506.aspx