在他18年的职业生涯中，Demian在商业和公司数据库应用方面担任过顾问和企业家。
During his 18 year career, Demian has assumed leadership roles as a consultant and as an entrepreneur, delivering commercial and corporate database applications.
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.
对于负担较重的事务性数据库和商业智能应用程序，心跳应更高一些。
For heavy transactional databases and for business intelligence applications, the heartbeat should be higher.
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