使用基础契约可以更有效地使用商业系统中的数据，并且需要的管理工作也较少。
Using base contracts allows for more efficient use of data within the commerce system, and requires less management effort.
尽管商业分析系统面临数据量、数据类型和处理速度的挑战，但在克服这些挑战方面也取得了巨大的进步。
While the amount, speed, and type of data are all challenges facing business analytic systems, great strides are being made in addressing these issues.
如果只是学习使用数据库，或者只想快速地实现数据库应用程序的原型，那么大多数商业数据库系统可能过于笨重。
If you're just learning to work with databases, or if you want to quickly prototype a database application, most commercial database systems can be cumbersome.
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