Questions tagged «ontology»

5
此键值数据库模式有名称吗?
我们处理来自客户的例行数据馈送,该客户只是将其数据库从一种看起来很熟悉的形式(每个实体一行,每个属性一列)重构为一个我不熟悉的形式(每个实体每个属性一行,): 之前:每个属性一列 ID Ht_cm wt_kg Age_yr ... 1 190 82 43 ... 2 170 60 22 ... 3 205 90 51 ... 之后:所有属性的一列 ID Metric Value 1 Ht_cm 190 1 Wt_kg 82 1 Age_yr 43 1 ... 2 Ht_cm 170 2 Wt_kg 60 2 Age_yr 22 2 ... 3 Ht_cm …
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