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• How to migrate from DB2 to PostgreSQL database?

  - by Dan

  I have an existing Windows DB2 database that I'd like to move onto PostgreSQL. The users for the application can live with a weekend's worth of downtime. What's the best way to do that?

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• Book Review: Pro SQL Server 2008 Relational Database Design and Implementation

  - by Alexander Kuznetsov

  Investing in proper database design is a very efficient way to cut maintenance costs. If we expect a system to last, we need to make sure it has a good solid foundation - high quality database design. Surely we can and sometimes do cut corners and save on database design to get things done faster. Unfortunately, such cutting corners frequently…

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• ?Oracle Database Appliance???????????

  - by Norihito Yachita

  ?????????????????????????????·????????Oracle Database Appliance???????????????????????????? ?Oracle Database Appliance????Oracle Linux??????2?????Sun Fire?????·???????????Oracle Database 11g Release 2?????Oracle Real Application Clusters???????????????? ?Oracle Database…

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• XML flat file vs. relational database backend

  - by donpal

  Most projects now need some form of a database. When someone says database, I usually think relational databases, but I still hear about flat file XML databases. What parameters do you take into consideration when deciding between a "real" database and a flat-file XML database.…

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• how to download update from iphone app to replace old sqlite database

  - by user301212

  hi i use sqlite database on my iphone app and i need to update this database from the internet from my server how i can download the new database and delete the old database and recopy the new database to document directory

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• how to download update from iphone app to sqlite database

  - by user301212

  hi i use sqlite database on my iphone app and i need to update this database from the internet from my server how i can download the new database and delete the old database and recopy the new database to document directory

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• sybase bcp import fails

  - by chromeplatedbanana

  We're trying to export some tables from our production database to our test database using bcp. The bcp export seems to work fine, but the import always fails with a data type error (see below). We tested on our test database exporting the table content to a file, then importing…

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• SQL 2008 Database tuning advisor won’t start

  - by Andrew Hancox

  For some reason I can't get DTA to connect to my development machine. It connects to a remote DB just fine but when I point it to my dev machine I get an error saying: Failed to initialize MSDB database for tuning (exit code: -1073741819). I'm pretty sure it's not a permissions…

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• MSSQL Replace Database in Live Web App

  - by casoninabox

  I have a web app that is currently live. I had the need to make major modifications to the database and now I need to replace the current one. My dev SQL instance is not the live one. I usually just make a backup of the new DB, blow the old one away and Restore my updated one.…

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• How do we greatly optimize our MySQL database (or replace it) when using joins?

  - by jkaz

  Hi there, This is the first time I'm approaching an extremely high-volume situation. This is an ad server based on MySQL. However, the query that is used incorporates a lot of JOINs and is generally just slow. (This is Rails ActiveRecord, btw) sel = Ads.find(:all, :select =…

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• Data won't save to SQL database, getting error "close() was never explicitly called on database"

  - by SnowLeppard

  I have a save button in the activity where the user enters data which does this: String subjectName = etName.getText().toString(); String subjectColour = etColour.getText().toString(); SQLDatabase entrySubject = new SQLDatabase(AddSubject.this); entrySubject.open();…

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• SQL SERVER – List of All the Samples Database Available to Download for FREE

  - by Pinal Dave

  It is pretty much very common to have a sample database for any database product. Different companies keep on improving their product and keep on coming up with innovation in their product. To demonstrate the capability of their new enhancements they need the sample…

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• Why is a database always represented with a cylinder?

  - by Creepy Gnome

  This question came up today and I couldn't find any historical answer as to why a database is always represented as a cylinder. I am hoping someone in the stack world would know why and have a link or something backing it up.

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• New Whitepaper: Advanced Compression 11gR1 Benchmarks with EBS 12

  - by Steven Chan

  In my opinion, if there's any reason to upgrade an E-Business Suite environment to the 11gR1 or 11gR2 database, it's the Advanced Compression database option.  Oracle Advanced Compression was introduced in Oracle Database 11g, and allows you to compress…

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• how to do database updates in each release

  - by Manoj R

  Our application uses database (mostly Oracle), and database is at the core. Each customer has its own database, with its own copy of application. Now with each new release of our product, we also need to update the database schema. These changes are adding…

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• Amazon SOA: database as a Service

  - by Martin Lee

  There is an interesting interview with Werner Vogels which is partly about how Amazon does Service Oriented Architecture: For us service orientation means encapsulating the data with the business logic that operates on the data, with the only access…

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• Which database to use and system/db administration by layman [closed]

  - by blah

  So my friend and I got briliant ;) idea for a business. Since it is not predictable whether it will work out or not, we decided to keep cost as low as possible to start with, in particular not to hire anyone. If it will work out as expected it will…

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• Best C# database communication technique

  - by user65439

  A few days ago I read a reply to a question where people said that the days of writing queries within your c# code are long gone. I'm not sure what the specific person meant with the comment but it got me thinking. At the company I'm currently…

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• When should we use weak entities when modelling a database?

  - by Songo

  This is basically a question about what are weak entities? When should we use them? How should they be modeled? What is the main difference between normal entities and weak entities? Does weak entities correspond to value objects when doing…

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• Single database, multiple system dependency

  - by davenewza

  Consider an environment where we have a single, core database, with many separate systems using this one database. This leads to all of these systems have a common dependency, which ultimately introduces coupling between them. This…

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• Where can I find more documentation on bulding an Ubuntu-based cloud infrastructure?

  - by Shazzner

  I've been reading: https://help.ubuntu.com/community/UbuntuCloudInfrastructure It's fascinating stuff, but documentation seems a bit sparse. Where I work, we have this aging, clunky VMWare ESXi setup for all our internal servers. I'd…

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• How are typical users expected to read the documentation in /usr/share/doc?

  - by ændrük

  I only recently learned that there is a huge pile of documentation in /usr/share/doc. How on earth is a typical user supposed to find out about that? It seems like much of it is gzipped, and inaccessible with administrative…

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• Pros/Cons of document based database vs relational database

  - by damian

  I've been trying to see if I can accomplish some requirements with a document based database, in this case CouchDB. Two generic requirements: CRUD of entities with some fields which have unique index on it ecommerce…

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• Communicating with Microsoft Dynamics GP Database and Project DataBase

  - by naveen

  Hi there, I am coding in ASP.NET C#. I have Microsoft Dynamics GP hosted at a server and my database hosted at another server. I would like the GP database take value from some table there and synchronise it with my…

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• SQL Server replication - how to sync tables from internal database to read-only website database

  - by frankadelic

  I have an internal SQL Server 2005 database "ADMIN_DATA" that is used by admin users. We would like to sync three of the database tables in ADMIN_DATA out to another SQL Server 2005 database "WEB_DATA", which is…

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