How to Model a Schema for Best Retrieve Information

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How to keep node relationship unique

great idea and what about the performance like for millions of record may be you can say i am over engineering it but actually i want to make system scale able . so two questions with reference. 1: what if date node dosen't exist it should create in that situation . 2: is this solution suitable for millions of record . ? i have tested some thing like this . query 1 : match parent node and option match date and time . then on the basis of this result i am creating missing nodes . so lets s…