This tag is for general database questions; if you question is specific to SQL use that tag instead.

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3
votes
1answer
248 views

Integration testing and database connection string in app.config

I am working on a project where SqlConnection is created via a static method, lets say it's DatabaseAccess.GetSqlConnection(). This method reads the .config file to get the connection string and ...
3
votes
1answer
318 views

Is this database design good? What JPA Entities should I create for this design?

I am trying my hands on JPA. For this I am thinking of using the example of a student admission process as shown in the diagram below. Is this design good ? Any suggestions for improvement are ...
2
votes
1answer
64 views

Reuse already fetched data for request

I have action that fetches user model from db to check access. Then I have method that in some cases requires same model. function checkAccess(req, res, next) { var data = ...
2
votes
1answer
797 views

Separation of retrieving data and business objects between DAL and BLL Layers

I did some research before posting this question. Among other questions or post, one of those is provided below. I could not get a clear mind how to determine.. Business Objects within a Data Access ...
1
vote
1answer
33 views

Should MVVM models contain complex objects

Let us say that I have a Book class, a book can have an object of another class like an Author or other complex objects like a list of Genres. My question is, in an MVVM model should I make the ...
1
vote
1answer
75 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 ...
3
votes
0answers
58 views

When connecting to a server using the DRDA protocol, is it true that the first Client-To-Server command MUST be EXCSAT chained with ACCSEC?

When connecting to a server using the DRDA protocol, is it true that the first Client-To-Server command MUST be EXCSAT chained with ACCSEC? I found 2 different answers when I googled it. If you look ...
2
votes
0answers
40 views

How to handle complex calculated fields in an ORM

In our API we've got a few central datatypes which need to be "decorated" (so to speak) after retrieval from the database with calculated values. The database is accessed through an ORM which follows ...
2
votes
0answers
159 views

Is this a good implementation of the builder pattern?

I'm trying to design an SQL builder in PHP. I'm trying to make it so that the system could work with different database systems (e.g. Oracle, MySQL, MSSQL). Here's what I've got so far. First, I have ...
2
votes
0answers
189 views

Entity Framework Lookup Tables

I am coming from working with ADO.net DataSets and feel fairly comfortable with how they work. Mainly, I usually have a DATA table with a large number of REF tables for lookups. In DataSets it was ...
2
votes
0answers
81 views

Three phase commit protocol

I'm trying to understand the three phase commit protocol by reading the wiki page (http://en.wikipedia.org/wiki/Three-phase_commit_protocol#Motivation). In the description for the diagram I posted ...
2
votes
0answers
127 views

Database version management on mobile apps

I am about to start building a mobile (iOS/Android) app that uses a local database (probably sqlite). Since this is my first "real" mobile app, I am wondering what the standard approaches are to ...
2
votes
0answers
109 views

What are some important considerations when developing a DBaaS (DataBase as a Service)

I'm interested in creating a Database as a Service. I want users of the service to be able to do a few seemingly not very simple things. Sign up and be given access to a JSON datastore that they can ...
2
votes
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 ...
2
votes
0answers
64 views

What are the benefits of having a remote database for your command line utility

I'm current working on a command line app that will grab resources online for you when you're setting up a new project locally. Right now all the urls for the resources I need are hardcoded into the ...
1
vote
0answers
81 views

how to import large amounts of data without locking sqlite database

Background Information I have a web app that provides the user with the usual CRUD functionality for "widgets" let's say. But I also have give them the option of creating widgets in bulk via ...
1
vote
0answers
33 views

Database data Bucketing Report Design

Here's the scenario: I have item x (item_id, customer_number, cost) which can be submitted to another system multiple times over months which may or may not reject item x before finally accepting it ...
1
vote
0answers
14 views

how to store program actively processing info for remote monitoring? Database?

So I have a program that processes a bunch of files. File in, start processing, file finished, next file. The question is, now I want to be able to monitor how that program is getting on, how? ...
1
vote
0answers
35 views

Database integration of Rails and Laravel apps

I have some very small apps on a VPS running ruby on rails and a co-worker also have some of his own apps running on laravel at another VPS. So far we dont needed to share any data among the apps, but ...
1
vote
0answers
56 views

Minimizing database requests for moves of a chess game?

I'm writing a webapp for chess which, for a given move and a database of games, shows all the moves that follow from that move. Pretty much what this website has already done: ...
1
vote
0answers
126 views

Syncing structured data and files in Android App with an ORM?

I am developing an Android App which I have developed for iOS before. The app requires that structured data and files are synced across android devices. In iOS, I was using Core Data and synced to ...
1
vote
0answers
17 views

compare different approachs for saving related records whose values may change

On a web application for accounting services, I have the good old Invoice. To keep this example as simple as possible, each Invoice has many rows, and each row has its item with its price. At the ...
1
vote
0answers
71 views

Automatically verifying INSERTs when building a PHP(5.3.3) application

I am building a form in PHP. I would like to automatically verify that INSERT queries are successful, and populate data correctly, as opposed to running queries in Workbench or MySQL with every code ...
1
vote
0answers
42 views

How can I aggregate data from separated databases in more efficient way?

Firstm I'm using PostgreSQL 9.3. I'm solving the problem which is to retrieve a data from a separated databases and to render it into a web page. The web project is on the Java (JSF 1.2). Presently ...
1
vote
0answers
181 views

Properly design program database to reflect organization structure

I'm having trouble setting up my program's database the 'right' way. I was hoping you guys could give me suggestions on doing it properly. I am creating a database+client for a non-profit organization ...
1
vote
0answers
47 views

Storing last polled database timestamp unix

I have a Unix script which is called by a scheduler (CTRL M) every 3 seconds. The script queries an external database(not belonging to my application and therefore I can only query it) to check for ...
1
vote
0answers
101 views

data stored in dbase (application result dd.mm.yyyy)

I have a .dbf file (dbase) with data of type "date" to read directly via php. I have the application result (format: dd.mm.yyyy) and the stored hex code. I can't interpret the hex data to get the same ...
1
vote
0answers
119 views

Unit Tests for Database Abstraction Layer

I previously asked this question about creating an algorithm for joining records from multiple databases, and since then, I have built a rudimentary version of it (which doesn't allow for inter ...
1
vote
0answers
143 views

Designing a loosely coupled app -> stored proc interface for PostgreSQL. A couple of questions

I am in the middle of designing a next generation database access class for one of the programs I am building. We use PostgreSQL exclusively. Our current approach is procedural (largely inspired ...
0
votes
0answers
7 views

Best approach for an android local database-based application containing non-sensitive data

What's the best approach to design an android application with the question title specification? The application will show a first list of buttons with an alphabetical classification (like button1: ...
0
votes
0answers
27 views

What are some common patterns for managing a polyglot persistence layer?

I am pretty interested in the idea of using multiple datastores to support a single application and understand the benefits in theory but would like to know a little more about how things are done in ...
0
votes
0answers
25 views

Application/Database Design: using a table for workflow/content approval logic

Probably a poor choice of title but can't think how else to word it. I am developing an app for a company using CakePHP (MVC Framework). I have built a "Status" model which essentially has an an ID ...
0
votes
0answers
36 views

Using Google for full text database search

I have a lot of text and I am storing it in Elastic search. Using Lucene, NLP and Wordnet filters the search is good but not as good as Google's because none of these methods use AI for the search so ...
0
votes
0answers
20 views

web app+databse+object store E2E testing

I wrote a thin layer that allows me to log every interaction between other programs and object store. It has simple logic to accept and serve only unbroken files(if checksums provided by user and ...
0
votes
0answers
19 views

DataStore for Certificates and Keys

I am developing a web application. It is a multitenant(SAAS) application. My application involves getting signed certificates from users. Obviously each certificate would be having a separate CSR and ...
0
votes
0answers
32 views

Fast comparison of recursive directory tree against a database?

I'm creating basic media player in the style of foobar2000. I want to load Id3 tags into a database because scanning whole directory tree every time is slow. The problem is, when user changes ...
0
votes
0answers
40 views

Is Event sourcing a good fit for database sync (master-multiple-slaves)?

I'm looking for a good way to maintain in sync local sqlite databases that could be offline to a master one, for a invoice app. Then I read about EventSourcing and Log structured storage and wonder ...
0
votes
0answers
40 views

Is Python Logging in a WSGI application a best practice a production environment?

I am trying to log my webpage access to a database. It is a requirement. It seems to be a difficult thing to do outside of Windows IIS, and I do not wish to use Python with IIS. My options seem to ...
0
votes
0answers
183 views

Hybrid Apps and Storage - how does it work with Native apps and which to use?

I'm using Ionic at the moment. I believe, like many others, that hybrid apps will become more more common/important than they are now simply because the frameworks are getting better and better. ...
0
votes
0answers
42 views

How can I model this scenario in a graph database?

I'm developing an application where users can tag resources and it's also important to know who tagged the resource with a specific tag. A graph database seems like a good fit for this and the rest ...
0
votes
0answers
84 views

What could possibly be a Mysql database structure for an web app say like Flurry?

Simply say, I'm working on a web App say like Flurry (http://www.flurry.com/), that would communicate with a Smartphone App trough API. Right now I'm designing the database structure, and I guess ...
0
votes
0answers
117 views

When to use a message queue as a web service database?

Does it make sense to implement a message queue system such as RabbitMQ or Kafka for the purpose of storing data in a queue? For example, this could be done in order to handle things such as ...
0
votes
0answers
24 views

searching for a user's friends

I have a rails that uses sunspot/solr for searching a number of models in our app. We are now adding a feature for searching for a user's friends. So if I look for "joe" all of my friends named ...
0
votes
0answers
416 views

Evaluating local storage for data persistence for small, stand-alone applications

TL;DR - I have a standalone application that will remain relatively small. I'm trying to evaluate between using XML files or a lightweight database for local storage of data that needs to be ...
0
votes
0answers
577 views

Best practice: Secure Android app online authentication

Currently, I develop an Android App needing online authentication for login (and registration). The main focus is on security. I’m amaing for: keeping the users’ passwords safe and preventing MITM ...
0
votes
0answers
92 views

Appropriate design / technologies to handle dynamic string formatting?

recently I was tasked with implementing a way of adding support for versioning of hardware packet specifications to one of our libraries. First a bit of information about the project. We have a ...
0
votes
0answers
73 views

Converting large files in python

I have a few files that are ~64GB in size that I think I would like to convert to hdf5 format. I was wondering what the best approach for doing so would be? Reading line-by-line seems to take more ...
0
votes
0answers
59 views

Using a single table for identity and metadata

I'm in the early design phase of a project to provide an e-commerce platform that will require several entities to be modelled, products, customers, orders, CMS pages, etc. They will all have a few ...
0
votes
0answers
90 views

Fixing data duplication in two similar tables in different databases

I'm currently doing maintenance on an old order system that has grown into the poster child for bad coding practice. One of the tings I'm dealing with is a lot of data duplication, which I want to ...
-4
votes
0answers
14 views

Oracle RMAN login with no recovery catalog

How I can Login to target database with no recovery catalog , and what is mean no recovery catalog ?