How do you track record relations in NoSQL?

Question

I am trying to figure out the equivalent of foreign keys and indexes in NoSQL KVP or Document databases. Since there are no pivotal tables (to add keys marking a relation be

Answer 1

You have

"user": {
    "userid": "unique value",
    "category": "student",
    "metainfo": "yada yada yada",
    "clubs": ["archery", "kendo"]
}

"comments": {
    "commentid": "unique value",
    "pageid": "unique value",
    "post-time": "ISO Date",
    "userid": "OP id -> THIS IS IMPORTANT"
}

"page": {
    "pageid": "unique value",
    "post-time": "ISO Date",
    "op-id": "user id",
    "tag": ["abc", "zxcv", "qwer"]
}

Well in a relational database the normal thing to do would be in a one-to-many relation is to normalize the data. That is the same thing you would do in a NoSQL database as well. Simply index the fields which you will be fetching the information with.

For example, the important indexes for you are

• Comment.UserID
• Comment.PageID
• Comment.PostTime
• Page.Tag[]

If you are using NosDB (A .NET based NoSQL Database with SQL support) your queries will be like

 SELECT * FROM Comments WHERE userid = ‘That user’;

 SELECT * FROM Comments WHERE pageid = ‘That user’;

 SELECT * FROM Comments WHERE post-time > DateTime('2016, 1, 1');

 SELECT * FROM Page WHERE tag = 'kendo'

Check all the supported query types from their SQL cheat sheet or documentation.