Determining what database product best fits the requirements and limitations in a specific situation. This is advice that generally requires much more insight into requirements than can easily be gleaned on a Q&A forum such as StackExchange.

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0
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2answers
871 views

How to build a table for a private messaging system that supports replies?

I'm writing a private messaging web application in PHP, the application allows replies such that when you view a message, you also get to see to what was that a reply to, and to what was that a reply ...
3
votes
1answer
11k views

What are the advantages and disadvantages of Firebase for a database? [on hold]

I am currently developing a site to track credits gained from exams, and how these stack up against the user's goal credits. I am looking for a database system that will store all the possible exams ...
3
votes
3answers
848 views

Which graph database for search engine and gis? [on hold]

I just learned there are "graph databases" out there, which are more suited for two applications "search engine" and especially "gis". To avoid discussions whether a relational DB is better suited ...
40
votes
6answers
40k views

About single threaded versus multithreaded databases performance

H2 is a single threaded database with a good reputation regarding performance. Other databases are multi-threaded. My question is: when does a multi-thread database become more interesting than an ...
-3
votes
0answers
26 views

can mysqli handle billions of query at the same time? [duplicate]

My curiosity is How big can a mysql database grow and can it handle billions of queries at a go? One more thing, what's the best practice (database design wise) to when creating a portal application ...
2
votes
1answer
197 views

best way to log large amounts of data

I'm building a new logging system for our company. I'm wondering about the best way to store about 50-100GB data each year. I'm looking at both MySQL and MongoDB. I'm considering MongoDB because it ...
6
votes
6answers
16k views

What is the easiest way to get started using databases with real data?

I have a project that could benefit from using a database, but I have no experience with databases, don't have access to a server, and have relatively little experience working with things living ...
0
votes
1answer
50 views

database to use for Automated Teller Machine [closed]

I have been working on an Automated Teller Machine project using Visual Studio and C# for my Bachelors Degree project. Which database platform should I use for this? I'm considering MySQL, but am ...
0
votes
1answer
3k views

Storing multidimensional array in MongoDB

I am attempting to convert a large MySQL database of product information (dimensions, specifications, etc) to MongoDB for flexibility and to move away from the restriction of a column based table. I ...
63
votes
6answers
29k views

What are the differences between NoSQL and a traditional RDBMS?

What are the differences between NoSQL and a traditional RDBMS? Over the last few months, NoSQL has been frequently mentioned in the technical news. What are its most significant features relative to ...
0
votes
2answers
414 views

how store billions of rows with no relation in a NoSQL one [closed]

I'm going to receive a large group of CSV files daily. Additionally I have 1 billion records of data (from those CSV files) but its not a fixed number (1b records daily). They're going to be growing ...
-2
votes
1answer
76 views

Password protected Database Engine with Server features and stored procedure [closed]

I like MS Access password protect feature but it does not useful for server based software like as SQLite which has password protect but not useful for server. SQL Server is one of the best DB engine ...
2
votes
1answer
3k views

Mirror / replicate only 1 table of a database

I need a good way to replicate a single table in SQL Server 2012 between different servers and different databases. I tried replica which works just fine, but there might be a much better / easier way ...
16
votes
7answers
4k views

Is polling the only way for updating app's data from a database?

An application needs to have data as more freshly updated from a database as possible. In such a case, is there any other way for getting the data, besides of a timer based requesting (polling) the ...
0
votes
0answers
293 views

MySQL along with Firebase for data sync

I'm currently working on a mobile app powered by a web platform, and the mobile app will have some offline capabilities. The application has a small amount of DB entities, and only about 3 of them ...
2
votes
1answer
104 views

Difference beetween mysql 5.5 and 5.6

I have a big performance problem beetwen my local mysql instance and the server. I have this request : DELETE a FROM a LEFT OUTER JOIN ( SELECT MAX(id) as id, `v_id`, `v_statut`, `c_controle`, ...
11
votes
2answers
4k views

Ready-to-Use Database models example

Where can I find ready-to-use database models ? I don't need a database with data in it, but only schemas (UML diagrams). Perhaps something like the data models at this link, but much more complex ...
3
votes
3answers
2k views

Relational vs Non-Relational Database for Events Database

I'm trying to find out whether an SQL or no-SQL solution would be better for creating an events database. I'm creating a ticketing system, similar to ticket master. I know that for either database-...
1
vote
0answers
21 views

Database Design for Multi-Level Ownership

I'm trying to figure out what sort of database and what sort of database structure would make sense for representing ownership of different assets by different constituencies. Say a group of 5 ...
0
votes
0answers
7 views

pattern matching on row attributes

I have the following: there are dozens of millions of records on the following format a1 a2 a3 ..... a10 where ai are float values of some attributes. I would like to store these records in a db ...
1
vote
1answer
35 views

Database Design help

I am building an application for comparing two or more songs. We have millions of songs. Currently we have access to raw data files (form a company like soundcloud) consisting of 1) Daily Users.csv ...
0
votes
1answer
37 views

To use tpc-h benchmark its really necessary create primary and foreign keys?

Im doing some tests with tpc-h benchmark. And Im with a doubt, and I didnt find any answer. The tpch-h benchmark simulates a data warehouse environment. And the most important here are the queries ...
4
votes
1answer
467 views

Database design for a car dealers website

I am creating a new website for all the car dealers in my region to show their cars on and i need your opinion on the database I have created because I have some doubts. For instance, is it best to ...
1
vote
1answer
86 views

Data structure design for supporting arbitrary number of columns in table or database [closed]

I am currently working on a sort-of a meta-modeler to build a free web service so that people can input data and run several models on that data. The task I am currently struggling is: user needs to ...
3
votes
5answers
990 views

Database: One table or many

I am working on a project of classified ads site. I have 12 main categories, and their items are 142, Like vehicles have cars, scooters, bikes, etc. Mobiles Phones have mobiles, tablets, accessories. ...
29
votes
6answers
12k views

What problems will I get creating a database per customer?

I remember from the stackoverflow podcasts that Fog Creek use a database per customer for Fogbugz. I assume that means the Fogbugz On Demand servers have 10s of thousands of databases. We are just ...
5
votes
2answers
694 views

Searching 500 million records of binary data

I will inserting into a database the signatures of 500,000,000 pictures. The signatures will be generated using libpuzzle. Each signature is 338 bytes. (so 160 GB) plus a table for searching (read ...
0
votes
0answers
37 views

Dealing with multiple user types, modules and requirements

I have the following database schema. Basically, it all comes down to this: - users can have multiple user types - some user types come with specific requirements for a complete profile - there are ...
0
votes
0answers
27 views

Help creating database schema to build database off

not sure if this is the right area for a question such as this but I am looking to create a database for an IS warehouse who deliver laptops, desktops, monitors and other peripherals to different ...
0
votes
2answers
71 views

Database design for millions of posts

I have this issue. I have three types of posts a user can generate (some users can generate all some can only generate one type). I have the following types: main, employee and admin posts. I ...
1
vote
0answers
72 views

Alternative to EAV to store data with an unknown structure

For my bachelor thesis I have to build a reseach database which has to meet the requirement of provenance. In the present case it means that among other things I have to store the results of my ...
0
votes
1answer
38 views

Machine learning database Big data

Which databases can I use for storing object features for machine learning use case, in case of Big data? To explain a bit more - object features basically represent an object in a form of an array ...
2
votes
1answer
76 views

Which AWS database services are designed for storing logging records like log4j or log4perl?

I have been using the file system for log4j and log4perl records and want to start using a database to store the information, especially to lookup records organized by pid. We are using MySQL RDS for ...
1
vote
1answer
577 views

CRM Address table and it relation

Hi I want to ask about I have this DBD for my CRM I am trying to have the addresss in one table(customer and Employee Address) and both customerID and Employee ID are guid I have in address table FK ...
0
votes
0answers
33 views

Sql or NoSql design for nested data

In our data model we have classes with one to many relations to eachother TestRun (HasMany) => TestData (HasMany) => AnalyzeRun (HasMany) => Output parameters. We have to query this data in multiple ...
4
votes
1answer
238 views

Re-designing a Database cost and advice [closed]

The web application I am working with has a huge Database that is a real mess, no foreign keys, no constraints, no indexes, no optimization, no normalization, nothing. Until now, the logic has been: ...
1
vote
3answers
420 views

secure way to connect with remote Mysql database

I created my application using MySQL and it relies completely on the database I have around 190 tables, and I'm afraid of security breaches and another problem is for remote access I have to add the ...
0
votes
2answers
236 views

Daily snapshot fact table

I have a list of products per costumer. Costumers can delete or add products to their list. I want to know in each day what is the list of products (and count) by costumer. My first approach is to ...
4
votes
2answers
132 views

How to design SQL schema that treats historical data as first-class citizen?

I'm currently designing a SQL Server database schema for an application that consists of highly structured "tree" data. So, a table might look like this: id parentId (references id in same table) ...
2
votes
1answer
3k views

Can I copy a collection in mongoDB from one database to another by copying the db files directly?

I tried using cloneCollection http://docs.mongodb.org/manual/reference/command/cloneCollection/ , but clonecollection takes a lot of time in case of big collection because it starts indexing the data. ...
-1
votes
2answers
92 views

DBA responsibilities: should they include suggesting a database engine for a new project? [closed]

I need your opinion on a subject. I have been working as DBA for a short time and I have been asked by the Project Manager which database engine I recommend for a new critical project. The options ...
4
votes
1answer
179 views

Best database design for website ranking

I am working on a project in which I need to rank websites in two way - Global rank and their rank in a particular country. There are various factors based on which both are calculated. There are ~200 ...
4
votes
6answers
4k views

Best database to store and retrieve Word and Excel documents

My current project is to create a barcode system (for lack of a better word) that is linked to a database (was not given more information or directions). My task is to have a barcode scanner ...
1
vote
1answer
67 views

What kind of database should I use?

I'm designing a new system and I'm wondering what kind of DB should I use for my needs. I have a tree structure of nodes, where each node has historic values. For each historic value it should hold 2 ...
5
votes
1answer
246 views

Managing and speeding up queries on PostgreSQL table with over 3 trillion rows

I have time series data which spans over 10 years and has over 3 trillion rows and 10 columns. At the moment I use a PCIe SSD with 128GB of RAM and I am finding that querying takes a significant ...
3
votes
1answer
41 views

Confused about what to use to create the data

I want to create a database for myself. The data has complex grouping. I don't know which system to use to create my database. The data is in groups and sub-group forms, it almost has 5-6 layers of ...
0
votes
0answers
26 views

Which database is suitable for simple querying/filtering/paging and ability to expire the data?

From what I read, i have to maintain index if I were to use redis. I can set EXPIRE of an object but then I have to update index set myself which is something I rather not do. mongodb has this ...
1
vote
0answers
55 views

Which database technologies to use? [closed]

We are a small construction company that currently has a very old, outdated database system that has been written over the past 20 years in Visual FoxPro. I have now been designated with the task of ...
2
votes
0answers
53 views

How to implement search for world-wide Wikipedia/OSM places with alternative-names

I would like to implement a search-backend which returns a location-aware search results of all Wikipedia / OSM place names, while recognising place names in all languages. Thus, if you search for "...
2
votes
2answers
43 views

How to set-up a distributed data storage system for The Real Junkfood Project

Context The Real Junkfood Project consists of a network of pay as you feel (PAYF) cafes. We need to log the data from each of ~100 cafes, generating perhaps 50 rows each par day. I estimate that this ...