Databases that do not use SQL as their query language.

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1answer
963 views

What is the recommended MongoDB schema for this quiz-engine scenario?

I'm working on a quiz engine for learning a foreign language. The engine shows users four images simultaneously and then plays an audio file. The user has to match the audio to the correct image. ...
3
votes
1answer
601 views

How would one build a relational database on a key-value store, a-la Berkeley DB's SQL interface?

I've been checking out Berkeley DB and was impressed to find that it supported a SQL interface that is "nearly identical" to SQLite. ...
3
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1answer
53 views

How do I best query for user-owned data when using NoSQL

Say I have a typical website which provides authenticated users access to their stored ('owned') data. Authorised users must be able to perform CRUD operations on their data. If I were using a ...
3
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0answers
175 views

Which type of query do wide column stores optimize

I have some experience with document based stores (MongoDB and CouchDB) and I am interested in exploring wide column databases. Based on my initial exploration I can grasp a basic understanding of ...
3
votes
2answers
1k views

Why is MongoDb popular with Node.js? [closed]

I've been looking att different web stacks, mainly rails and node.js. One thing that strikes me is that while rails is often used with a relational database Node.js seem to go hand in hand with ...
2
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4answers
849 views

Why NoSQL (Key-Value) storage become popular these days?

It seems that NoSQL concept not something very new and innovative, but these days become very popular. Why it become popular recently but not happen in the time when SQL is very popular?
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6answers
2k views

Dynamic Fields/Columns

What is the best way to allow for dynamic fields/database columns? For example, let's say we have a payroll system that allows a user to create unique salary structures for each employee. How ...
2
votes
2answers
280 views

Should I use relational or noSQL databases for this problem

I'm working on a project where one part is to save data of different people. A typical person might have the following structure: Email: Multiple values possible City: Multiple values possible ...
2
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2answers
226 views

Lucene + Joins == RDBMS?

Now that Lucene supports joins (at indexing time and at querying time) can one use Lucene as a databse (a NoSQL one, with Eventual Consistency)? Note: I was pondering on that for sometime and this is ...
2
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2answers
3k views

How to represent a tree structure in NoSQL

I'm new to NoSQL and have been playing around with a personal project on the MEAN stack (Mongo ExpressJs AngularJs NodeJs). I'm building a document editor of sorts that manages nodes of data. Each ...
2
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6answers
1k views

what is the benefit of using key/value stores with respect to database sharding?

What has key/value stores got to do with making database sharding easier? Because if I do not use a key/value store, I can easily shard my database too right? (Like say, I can easily say users with ...
2
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3answers
351 views

Is it sane to use Document based NoSQL for store big data tables

In Document based NoSQL to create tables (AFAIK) I need: Create such many as many rows in table documents with same ID field (that will be table id) and each time need to set the columns (for each ...
2
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1answer
227 views

Is there a better way to update NoSQL records in bulk?

When we started our application we had the choice of going with the traditional MS-SQL normalized database or with a NoSQL database (RavenDB is what we tried out). Here is a simplified version of our ...
2
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1answer
156 views

n:m as the only way to store notifications?

I have a user and a notifications table. I want to make sure that every users sees a new notification once and only once. Not more, not less. The intuitive idea is to have a n:m relation table with ...
2
votes
1answer
314 views

Orthogonal design for product pricing and production planning with a NoSQL database [closed]

I am in the process of developing extensible software for the company I am working with for product pricing and production planning. The Present Scenario There are basically two types of products: ...
2
votes
1answer
81 views

Proper tree NoSQL structure with focus on full-text searching

I developing an app with tree(folder-file) structure, on which I should perform full-text searches with MongoDB. I did a research on the best tree structure practices and found this great article, but ...
2
votes
1answer
238 views

Architecture: Storing all properties as JsonProperty in NDB?

I am storing the data for my app in Google's NDB, but am confused as to what architecture to use. The app data is mostly text based, but has some non-text properties like DateTimeProperty, ...
2
votes
1answer
477 views

Sub-Resource data should be embedded in Resource entity or duplicated in NoSQL document?

I have a scenario similar to as depicted below, public class Post { private int id; private int postType; private int score; private User originalPoster; private String title; ...
2
votes
1answer
643 views

How best to merge/sort/page through tons of JSON arrays?

Here's the scenario: Say you have millions of JSON documents stored as text files. Each JSON document is an array of "activity" objects, each of which contain a "created_datetime" attribute. What is ...
2
votes
1answer
485 views

Active Record library with support for both SQL and NoSQL?

I'm looking for a PHP Active Record library that supports both SQL and NoSQL drivers (mongodb in particular). It doesn't matter if it actually has the NoSQL driver, I can write it myself, as long as ...
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0answers
163 views

Is this a good implementation of mongodb for a money management tool?

I have a money management tool which has users. Each user may have several accounts/funds (e.g. bank account). For each account/fund there may be thousands of transactions. Users may only view their ...
2
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0answers
109 views

Would a model like this translate well to a document or graph database?

I'm trying to understand what types of models that I have traditionally persisted relationally would translate well to some kind of NoSQL database. Suppose I have a model with the following ...
1
vote
1answer
2k views

Is map-reduce the basic factor that makes NoSQL more scalable than SQL?

I'm studying the differences between NoSQL and SQL, and what makes the first more scalable. I think I got the point, so I'll try to explain: Suppose an app has a list of billions of users, each with ...
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2answers
575 views

what is storing data in constant space?

"bloom filter allows us to store data in constant space" Can someone explain what exactly does that sentence means?
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4answers
982 views

How to factor out data layer in nopCommerce and replace MS SQL with RavenDB?

I am new to nopCommerce and ecommerce in general but I am involved in an ecommerce project. Now from my past experiences with RavenDB (which mostly were absolutely pleasant) and based on the needs of ...
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2answers
200 views

NoSQL or MySQL? [closed]

I'm developing an app that requires to save data that is not consistent across all rows. These database entries represent different kind of sport activities. Let's take an example: In football the ...
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1answer
53 views

Looking for advice for the following MS SQL Schema

We currently have the following SQL Schema: Projects Budgets BudgetTabs BudgetSections BudgetTasks BudgetTaskDetails ...
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2answers
479 views

Why OTServs have an item cloning problem if the server crashes? [closed]

OTServs are open source MMORPGs with a huge community. Mostly all of them have a serious problem: if the server crashes, people can clone items. This is a dirty trick that can be executed because the ...
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1answer
33 views

How to structure a reservations system in a document based database?

I really don't know if this is the right forum for this but I need help designing my database. Also I apologize for the horrible title: I don't know how to summarize the issue below in a single title. ...
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2answers
172 views

Is NoSQL a good fit for a graphing app, and how can I compare different NoSql Servers?

I am traditionally a MsSQL or MySQL developer - I have been prototyping a new application that involves storing data from many targets. I have seen that the app appears to get slow after scaling to ...
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1answer
819 views

NoSQL as file meta database

I am trying to implement a virtual file system structure in front of an object storage (Openstack). For availability reasons we initially chose Cassandra, however while designing file system data ...
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1answer
206 views

A very simple database system with JSON

If we need to store some data in a database, but without the need of advanced SQL features, can we use this scheme (written here in Javascript / node.js) : // the DB will be in RAM ! var myDb = {}; ...
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1answer
261 views

Is Neo4j graph database sufficient to itself for all query types?

Neo4j eases relationship traversals => especially useful for a social network for instance. But are there any scenarios when it's advised to associate an additional relational database (or other ...
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1answer
110 views

Likes / Stars / Following - same or separate data structures? [duplicate]

I am building a social network, which will have standard features of 'likes' (upvotes) for posts, 'following' between users and 'stars' for favorite posts. These might reasonably expand in the future ...
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1answer
55 views

Object Storage where Object Type is variable

From time to time, we come across a problem where we must store an object, but we don't know in advance what kind of object we're going to store. I'm going to give a very simple example. Requirement: ...
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4answers
148 views

Is there an accepted design pattern for storing a few global variables in a NoSQL database?

I'm wanting to create an admin dashboard for my app, and to show new events there. In order to know which events are new, I'll need to store at least one extra datapoint to the server: the last date ...
1
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1answer
337 views

options for data analytics for time series store

I'm building an Internet of Things solution that has a number of real time feeds. I need to make a couple of design decisions with regards to the data store and reporting and looking for input. I ...
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1answer
124 views

Confused in NoSql data model

I have a web application that uses MongoDB as primary database. This is the first project I do with a NoSQL DB. I'm trying to create the application model but I'm confused. I know NoSQL databases are ...
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2answers
307 views

Is eventual consistency a wrong solution for e-commerce applications?

I'm reading about eventual consistency in couchDB. I'm somewhat confused by the term and its consequences on an application. Let's say I'm building a distributed e-commerce website where monetary ...
1
vote
1answer
1k views

NoSQL (Azure Table Storage) RowKey design for ordered data

I store large quantities of GPS data in storage tables. Each partition can reach up to 1 million entities. Each GPS entity that is inserted into the table is actually sequential to the previous data ...
1
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1answer
166 views

Azure Storage Table design with multiple query points

I have the following Azure Storage Table. PositionData table: PartitionKey: ClientID + VehicleID RowKey: GUID Properties: ClientID, VehicleID, DriverID, Date, GPSPosition Each vehicle will log ...
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1answer
865 views

Static Tables vs Dynamic Entity Attributes Storage Configurations

I am trying to figure out a better way to decide table storage configurations whether it will use static configurations using tables or dynamic configurations using EAV (entity-attribute-value) When ...
1
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2answers
109 views

NoSQL Modify operations performance

I am working on the application which in near future (hopefully) will have to process tens or hundreds of thousands of items (item is currently one row in relational database table) per second. If I ...
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1answer
60 views

Expert advice needed for a NoSql Database

At our company, I have been given the task to develop a Mobile Application (iOS, Android and in the future, maybe Windows). Given those devices, it's likely that we'll have a high number of ...
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0answers
74 views

Code structure with MongoDB in python

I am new to MongoDB and python. I know how to make basic use of pymongo in order to manipulate documents. I am having trouble finding how to create some structure or governance in what gets inside ...
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0answers
528 views

How to link the data of MongoDB and Neo4j?

I want to implement a system which store the profiles of employee and the resources that they have. There are many types of resources, such as the documents they produced, the techniques they ...
1
vote
1answer
186 views

Automatic denormalization for a NoSQL database application

We have a use case where we store table-like data, but we know about the schema of the data only at runtime. In our application, a power user defines a schema and normal user can create records and ...
0
votes
3answers
450 views

When to use a nosql database such as mongodb over mysql?

I'm new to the concept of nosql databases and have never used it. Based on what I've read and the little that I've understood I still don't see how they can be particularly useful if you can't make ...
0
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1answer
293 views

Is NoSQL a better choice when working with OOP? [closed]

This might be a silly question, but I've reading a little bit about NoSQL databases on the past few days and I'm trying to understand when really they help us. One thing I've realized though is that ...
0
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1answer
169 views

Recommendation for a database to query records with attributes that are arrays or hashes?

I'm building site with a very simple data structure: documents that are nodes that reference other nodes that each have arrays of parents, children and siblings, so the structure is: Node: uuid name ...