Open Access

表1

关于联接操作的定性比较

序号 比较项 文献[2] 文献[8] 本文
1 多数据库联接 涉及 涉及 涉及
2 分页查询 不支持 支持 支持
3 预取查询 不支持 不支持 支持

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

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