Scalability and Performance

	Express	Workgroup	Standard	Enterprise
Paid Yearly	FREE	$999.90* ($83.33 average monthly cost)	$2499.90* ($208.33 average monthly cost)	Contact Us
	* Two months FREE with a yearly payment.
Paid Monthly	FREE	$99.99 ($149.99 dual processor)	$249.99 ($499.99 dual processor)	Contact Us
Number of CPUs	1	2	4	No Limit
RAM	1 GB	3 GB	Operating System Maximum	Operating System Maximum
64-bit Support	Windows on Windows (WoW)	Windows on Windows (WoW)
Database Size	4 GB	No Limit	No Limit	No Limit

High Availability

	Express	Workgroup	Standard	Enterprise
Database Mirroring
Failover Clustering
Backup Log-shipping
Online System Changes
Fast Recovery

Manageability

	Express	Workgroup	Standard	Enterprise
Auto Tuning
Profiler
SQL Server Management Studio Express
Management Studio
Serviceability Enhancements
SQL Agent Job Scheduling Service

Business Intelligence

	Express	Workgroup	Standard	Enterprise
Report Server
Report Builder
Reporting Data Sources
Data Warehousing
SQL Analytical Functions
Enterprise Management Tools
Analysis Services
Business Analytics
Data Mining
Text Mining