This kind stores data in a hash table where there is a unique key and a pointer to a particular item of data.e.g.
----- : ------
Id1_Name : Niladri Biswas
Id1_Citizenship : Indian
Id2_Name : Mike Curz
Id2_Citizenship : American
Since it is guarented to always have a unique key for a particular object, we can query the database for that unique key and get the results back from whichever node has the object.
Examples involve Rika,Dynamo etc.
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