Especially since relational database products come out, people pay close attention to the issue of data interoperation and data sharing.
尤其是关系型数据库产品问世以来，异构数据库之间实现互操作及数据共享的问题就一直被人们所关注。
Especially since relational database products come out, people pay close attention to the issue of data interoperation and data sharing.
尤其是关系型数据库产品问世以来，异构数据库之间实现互操作及数据共享的问题就一直被人们所关注。
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