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• Eloquera Database 2.7.0 is released (native .NET object database)

  Eloquera ( www.eloquera.com ) originally designed and developed for use in the Web environment and its designed as native .NET application in C#. Eloquera wasnt ported from Java as many other databases. Eloquera natively as part of architecture supports: Save the data with a single line of code// Create the object we would like to work…

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• basic database design table on rails

  - by runcode

  I am confuse on a concept. I am doing this on rails. Is that Entity set equal to a table in the database? Is that Relationship set equal to a table in the database? Let say we have Entity set "USER" and Entity set "POST" and Entity set "COMMENT" User- can post many posts and comments as they want Post- belong to users Comments-belong to posts…

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• ????!Platinum?????????Oracle Database ??????@??????

  - by Yusuke.Yamamoto

  ?ORACLE MASTER Platinum??????????????????????????????????????????? ?????????????????????????????????PS??????????????????? 12???????????????????????????????????????? ??????????????????????18?30?~??? 4????????????????????? ????? Oracle Database ????????????????????????????????????????????????????? ???????·????????? SQL??? ??????????? …

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• Creating a test database with copied data *and* its own data

  - by Jordan Reiter

  I'd like to create a test database that each day is refreshed with data from the production database. BUT, I'd like to be able to create records in the test database and retain them rather than having them be overwritten. I'm wondering if there is a simple straightforward way to do this. Both databases run on the same server, so apparently…

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• Database Table Schema and Aggregate Roots

  - by bretddog

  Hi, Applicaiton is single user, 1-tier(1 pc), database SqlCE. DataService layer will be (I think) : Repository returning domain objects and quering database with LinqToSql (dbml). There are obviously a lot more columns, this is simplified view. http://img573.imageshack.us/img573/3612/ss20110115171817w.png This is my first attempt of…

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• Keeping video viewing statistics breakdown by video time in a database

  - by Septagram

  I need to keep a number of statistics about the videos being watched, and one of them is what parts of the video are being watched most. The design I came up with is to split the video into 256 intervals and keep the floating-point number of views for each of them. I receive the data as a number of intervals the user watched continuously.…

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• What's the "best" database for embedded?

  - by mawg

  I'm an embedded guy, not a database guy. I've been asked to redesign an existing system which has bottlenecks in several places. The embedded device is based around an ARM 9 processor running at 220mHz. There should be a database of 50k entries (may increase to 250k) each with 1k of data (max 8 filed). That's approximate - I can try to…

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• Database Design Question regaurding duplicate information.

  - by galford13x

  I have a database that contains a history of product sales. For example the following table CREATE TABLE SalesHistoryTable ( OrderID, // Order Number Unique to all orders ProductID, // Product ID can be used as a Key to look up product info in another table Price, // Price of the product per unit at the time of the order Quantity, //…

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• Saving Abstract and Sub classes to database

  - by bretddog

  Hi, I have an abstract class "StrategyBase", and a set of sub classes, StrategyA/B/C etc. The sub classes use some of the properties of the base class, and have some individual properties. My question is how to save this to a database. I'm currently using SqlCE, and Linq-To-Sql by creating entity classes automatically with…

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• Database design: Calculating the Account Balance

  - by 001

  How do I design the database to calculate the account balance? 1) Currently I calculate the account balance from the transaction table In my transaction table I have "description" and "amount" etc.. I would then add up all "amount" values and that would work out the user's account balance. I showed this to my friend and…

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• What are the reasons to select Object Oriented Programming over Procedural Programming?

  - by Starx

  Nowadays, Standard Coding has become Synonymous to Object Oriented Programming. But what are the reasons that forced classical procedural programming out of the way and rose the new concept of Object Oriented Programming. What were the limitations that Procedural Programming could not accomplish? and Does procedural…

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• build a Database from Ms Word list information...

  - by Jayron Soares

  Please someone can advise me how to approach a given problem: I have a sequential list of metadata in a document in MS Word. The basic idea is create a python algorithm to iterate over of the information, retrieving just the name of PROCESS, when is made a queue, from a database. for example. Process: Process Walker…

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• Announcing: Oracle Enterprise Manager 12c Delivers Advanced Self-Service Automation for Oracle Database 12c Multitenant

  - by Scott McNeil

  New Self-Service Driven Provisioning of Pluggable Databases Today Oracle announced new capabilities that support managing the full lifecycle of pluggable database as a service in Oracle Enterprise Manager 12c Release 3 (12.1.0.3). This latest release builds on…

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• Handling changes to data types and entries in a database migration

  - by jandjorgensen

  I'm fully redesigning a site that indexes a number of articles with basic search functionality. The previous site was written about a decade ago, and I'm salvaging about 30,000 entries with data stored in less-than-ideal formats. While I'm moving from MSSQL to MySQL, I don't need to make any "live" changes, so…

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• Staying OO and Testable while working with a database

  - by Adam Backstrom

  What are some OOP strategies for working with a database but keeping thing testable? Say I have a User class and my production environment works against MySQL. I see a couple possible approaches, shown here using PHP: Pass in a $data_source with interfaces for load() and save(), to abstract the backend source…

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• Android Card Game Database for Deck Building

  - by Singularity222

  I am making a card game for Android where a player can choose from a selection of cards to build a deck that would contain around 60 cards. Currently, I have the entire database of cards created that the user can browse. The next step is allowing the user to select cards and create a deck with whatever cards…

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• How to quickly search through a very large list of strings / records on a database

  - by Giorgio

  I have the following problem: I have a database containing more than 2 million records. Each record has a string field X and I want to display a list of records for which field X contains a certain string. Each record is about 500 bytes in size. To make it more concrete: in the GUI of my application I have a…

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• Database migrations for SQL Server

  - by Art

  I need a database migration framework for SQL Server, capable of managing both schema changes and data migrations. I guess I am looking for something similar to django's South framework here. Given the fact that South is tightly coupled with django's ORM, and the fact that there's so many ORMs for SQL…

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• Any experience with Itzam Portable Embedded Database Engine?

  - by Andy Dent

  Has anybody ever used or have useful comments on Itzam/core? I am attracted to it partly because I was impressed by the author's book C++ Components & Algorithms and as a possible backend for my search for a large non-SQL portable database engine.

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• Storing Preferences/One-to-One Relationships in Database

  - by LnDCobra

  What is the best way to store settings for certain objects in my database? Method one: Using a single table Table: Company {CompanyID, CompanyName, AutoEmail, AutoEmailAddress, AutoPrint, AutoPrintPrinter} Method two: Using two tables Table Company {CompanyID, COmpanyName} Table2…

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• Database migrations for MS SQL Server

  - by Art

  I need a database migration framework for MS SQL Server, capable of managing both schema changes and data migrations. I guess I am looking for something similar to django's South framework here. given the fact that South is tightly coupled with django's ORM, and the fact that…

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• What is a columnar database?

  - by Raj More

  I have been working with warehousing for a while now. I am intrigued by Columnar Databases and the speed that they have to offer for data retrievals. I have multi-part question: How do Columnar Databases work? How do they differ from relational databases? Is there a trial…

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• architect users feed in database

  - by islam

  dear i want to make architect for application like google reader so how i can architect -organize- users feeds(rss,atoms) in database with best performace way.

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• When shouldn't you use a relational database?

  - by Stephen

  Apart from the google/bigtable scenario, when shouldn't you use a relational database? Why not, and what should you use? (did you learn 'the hard way'?)

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• Best books for SQL Server / database design.

  - by ioannis

  I have some really good books for SQL Server, like: SQL Server 2008 Bible Pro SQL Server 2008 - Relational Database Design and Implementation SQL Server 2008 for Developers. Can you suggest/recommend some other titles, that may address other topics perhaps, that you found…

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