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• Database: Storing Dates as Numeric Values

  - by Chin

  I'm considering storing some date values as ints. i.e 201003150900 Excepting the fact that I lose any timezone information, is there anything else I should be concerned about with his solution? Any queries using this column would be simple 'where after or before' type lookups. i.e Where datefield is less than 201103000000 (before March next year).…

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• What databse uses these specific type of .dat and .idx files?

  - by Cape Cod Gunny

  I'm trying to figure out what type of database uses these specific .dat and .idx files. When I view the .dat files using a binary file reader I see Record Schema followed by somewhat decipherable data names. A little further down I see Key Schema whch apears to be a comma separated list of clear text references. Each .dat file has a matching .idx…

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• Is there any defined atom syndication xml schema?

  - by yapiskan

  Yep, I asked it. There is no more thing to tell :) Thanks in advance.

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• database is normalized but the following is a problem please help

  - by user287745

  but the prob is there are relations ships which are so huge that after normalizing they have like a 20 primary keys( composite keys) which are really foreign keys but have to be declared as primary keys to identify the relationship uniquely. so please help? is it correct and i apologize to the expert community for not accepting answers, i was…

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• How to map to tables in database PHPMyAdmin

  - by thegrede

  I'm working now on a project which a user can save their own coupon codes on the websites, so I want to know what is the best to do that, Lets say, I have 1 table with the users, like this, userId | firstName | lastName | codeId and then I have a table of the coupon codes, like this, codeId | codeNumber So what I can do is to…

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• correct approach to store in database

  - by John

  I'm developing an online website (using Django and Mysql). I have a Tests table and User table. I have 50 tests within the table and each user completes them at their own pace. How do I store the status of the tests in my DB? One idea that came to my mind is to create an additional column in User table. That column containing testid's…

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• Database table relationships: Always also relate to specified value (Linq to SQL in .NET Framework)

  - by sinni800

  I really can not describe my question better in the title. If anyone has suggestions: Please tell! I use the Linq to SQL framework in .NET. I ran into something which could be easily solved if the framework supported this, it would be a lot of extra coding otherwise: I have a n to n relation with a helper table in between. Those tables…

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• Generic version control strategy for select table data within a heavily normalized database

  - by leppie

  Hi Sorry for the long winded title, but the requirement/problem is rather specific. With reference to the following sample (but very simplified) structure (in psuedo SQL), I hope to explain it a bit better. TABLE StructureName { Id GUID PK, Name varchar(50) NOT NULL } TABLE Structure { Id GUID PK, ParentId GUID (FK to…

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• Database Modelling - Conceptually different entities with near identical fields

  - by Andrew Shepherd

  Suppose you have two sets of conceptual entities: MarketPriceDataSet which has multiple ForwardPriceEntries PoolPriceForecastDataSet which has multiple PoolPriceForecastEntry Both different child objects have near identical fields: ForwardPriceEntry has StartDate EndDate SimulationItemId ForwardPrice…

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• Pros and Cons for CreatedDate and ModifiedDate columns in all database tables

  - by Ismail

  What are the pros and cons? When should we have them and when we shouldn't?

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• How to write an RDF Schema?

  - by trickdev

  I am trying to get my head around using RDF to describe custom resources. I understand there are xmlns' out there such as Dublin Core and foaf which provide predefined element sets. How do I go about creating my own? I may be barking up the wrong tree of course and should stick to xml + xsd?

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• Naming of boolean column in database table

  - by Space Cracker

  I have 'Service' table and the following column description as below Is User Verification Required for service ? Is User's Email Activation Required for the service ? Is User's Mobile Activation required for the service ? I Hesitate in naming these columns as below IsVerificationRequired…

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• What tools do you use to plan and draw a database structure = tables, relationship

  - by EugeneP

  Modeling tool or just a visual tool for drawing. In fact I only need to draw and later I'll transform the picture into sql by hand to better control the process.

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• With modern social networking and scaling, can Cassandra replace the standard relational database su

  - by alex

  Is it possible to build the entire social networking application on cassandra? Sure, it takes longer to set up, but it scales much better. Correct? Please list the situations when Cassandra should be used.

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• Upgrading from SQL2000 database to SQL Express 2008 R2

  - by itwb

  Hi, We have a web application which uses a MSSQL 2000 backend database. We are currently paying a ridiculous amount for Shared Hosting, with the database costs alone costing us $150 per month (MSSQL 100mb extra space is $40 per month). Our database size is 896.38 MB I am looking at getting a…

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• MySQL root user can't access database

  - by Ed Schofield

  Hi all, We have a MySQL database ('myhours') on a production database server that is accessible to one user ('edsf') only, but not to the root user. The command 'SHOW DATABASES' as the root user does not list the 'myhours' database. The same command as the 'edsf' user lists the database: …

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• Getting started with Oracle Database In-Memory Part III - Querying The IM Column Store

  - by Maria Colgan

  In my previous blog posts, I described how to install, enable, and populate the In-Memory column store (IM column store). This weeks post focuses on how data is accessed within the IM column store. Let’s take a simple query “What is the most expensive air-mail order we have received to…

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• Problems locating Redmine database

  - by zordor

  I have an active redmine but I can not find the database where it is running right now. It should be on PostgreSQL but the database where it should be running is empty. Does anybody have any idea how to check current database used by redmine? Please let me know if you need any extra…

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• Setting XSL-FO XML Schema in Visual Studio

  - by Lukasz Kurylo

  I'm playing lately with an XSL-FO for generating a pdf documents. XSL-FO has a long list of available tags and attributes, which for a new guy who want to create a simple document is a nightmare to find a proper one. Fortunatelly we can set an schema for XSL-FO, so will result…

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• Centrally managing 100+ websites without bankrupting a small company

  - by palintropos

  I'm mainly interested in opinions on the trade-offs between having a single central server all the websites connect to as opposed to each website mirroring a subset of the master database with all the products in it. For example, will I run into severe performance issues (or even…

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• Relational vs. Dimensional Databases, what's the difference?

  - by grautur

  I'm trying to learn about OLAP and data warehousing, and I'm confused about the difference between relational and dimensional modeling. Is dimensional modeling basically relational modeling, but allowing for redundant/un-normalized data? For example, let's say I have historical…

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• Subsonic - How to use SQL Schema / Owner name as part of the namespace?

  - by CResults

  Hi there, I've just started using Subsonic 2.2 and so far very impressed - think it'll save me some serious coding time. Before I dive into using it full time though there is something bugging me that I'd like to sort out. In my current database (a SQL2008 db) I have split…

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• Still Confused About Identifying vs. Non-Identifying Relationships

  - by Jason

  So, I've been reading up on identifying vs. non-identifying relationships in my database design, and a number of the answers on SO seem contradicting to me. Here are the two questions I am looking at: What's the Difference Between Identifying and Non-Identifying…

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• What is the correct high level schema.org microdata itemtype for a retail brand/company homepage?

  - by kpowz

  I'd like to hear which schema.org itemtype others would recommend using or have used in the case of completing a retail brand's company homepage microdata. Take for example TOMS's shoes: Example #1 - Using /Corporation as the high-level itemtype one can include a…

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• Change Sequence to Choice

  - by Gordon

  In my Schema File I defined a Group with a Sequence of possible Elements. <group name="argumentGroup"> <sequence> <element name="foo" type="double" /> <element name="bar" type="string" /> <element name="baz"…

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