Invention Grant
US07899840B2 Group joins to navigate data relationships 有权
组联接以导航数据关系

Group joins to navigate data relationships
Abstract:
A group join query facilitates navigation of relationships (e.g., one-to-many or many-to-one) across a plurality of data collections. Such a query operator produces nested or hierarchical results that capture the arguments passed thereto. If desired, the nested results can be flattened to simulate conventional relational database results.
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