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  • Java class in DB

    - by Debuger
    Hi! Can anyone explain why was idea to store Java class in Db? What it is good for? And how to create stored procedure with Java class? Best regards!

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  • Databases: Migrate data between MS Access DB and MYSQL

    - by Dean
    Hello, I have 2 databases, one is MS Access DB from an old website, and the other one is MYSQL from the new Joomla+VirtueMart based website. I need to migrate existing products from MS Access to MYSQL. I thought of putting both on server and writing SQL queries in MYSQL workbench, untill I have a good script for that, but I'm very new to SQL, so I'd rather avoid that. I there a better way and more efficient for that?

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  • SimpleDB as Denormalized DB

    - by Max
    In an environment where you have a relational database which handles all business transactions is it a good idea to utilise SimpleDB for all data queries to have faster and more lightweight search? So the master data storage would be a relational DB which is "replicated"/"transformed" into SimpleDB to provide very fast read only queries since no JOINS and complicated subselects are needed.

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  • Restoring Typus plugin after changing DB Schema

    - by benoror
    I installed Typus plugin (http://intraducibles.com/projects/typus) for my app and I love it. But along the development of the app I frequently do migrations and change the DB Schema and relationships, and then the plugin fails. Is there a way to re-generate the plugin with the new schema? Thanks!

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  • Dynamically Insert Variables into DB Table using PreparedStatement

    - by gran_profaci
    I was working with PreparedStatement today and noticed that it used setString() setTimestamp() etc. to insert variables into the DB. I basically have 20 tables each with at least 15 columns and it would not be feasible for me to manuallt write down all the setters. Considering that I have an ArrayList "Vals" which contains all the variables to be inputted in String format (obtained by getString() using PreparedStatement itself), is there any way I can do an insert without using expressly using the Setters? That would save me a lot of time.

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  • Table in DB for generating primary keys?

    - by Sapphire
    Do you ever use a separate table for "generating" artificial primary keys for DB (and why)? What I mean is to have a table with two columns, table name and current ID - with which you could get new "ID" for some table by simply locking the row with that table name, getting the current value of the key, increment it by one, and unlock the row. Why would you prefer this over standard integer identity column? P.S. The "idea" is from Fowlers Patterns of Enterprise Application Architecture, btw...

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  • How to syncronize merge subscription in Sql Compact DB (on a Mobile device emulator)

    - by Bero
    Using SQL ManagementStudio 2008 I created SQL 3.5 Compact DB (TestCompact.sdf) and I have created subscription to existing Publication. Using SQL Management Studio it is working. I have transfered TestCompact.sdf to Windows Mobile 5 emulator device and with QueryAnalyzer for Mobile I could query existing tables in TestCompact.sdf. I don't know how to start replication synchronization on that mobile device. Do I need to write some C# code or it is possible do it more simple?

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  • Running a sharded DB from a single machine

    - by ming yeow
    This sounds kinda dumb, but I have a sharded DB that I no longer think I need to run on 2 machines, and would like to run on one single machine instead. Any ideas on how that can potentially be done? There are lots of resources on how i can achieve the converse, but very little on how this can be done

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  • Selecting favourites from DB rails 3

    - by Richlewis
    I have a small app which has Users, Recipes, Ingredients and preparation models A user has many recipes, recipes belong to user and ingredients/preparation belongs to recipes. Now a user can view all recipes but I would like the option to add the particular recipe to a favourites list. Would I need to set a new DB to hold this and then link by associations or could I add a column to the recipe model called fav for example? Im looking for the best practice here or if someone has done this before and can offer any advice that would be appreciated

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  • Connect Orbeon Xform to External Exist DB

    - by user302254
    I am attempting to connect a new Orbeon XForm to an existing exist db. My code should submit an xml doc to be stored in that database. <xf:submission id="save-to-file" method="get" action="http://server:8081/exist/rest//test/test/inventory_sample.xml" replace="instance" instance="data-instance" includenamespaceprefixes="ai"/> When attempting to submit my xml file, my log reveals an authentication error: Apr 6, 2010 2:06:08 PM org.apache.commons.httpclient.auth.AuthChallengeProcessor selectAuthScheme INFO: basic authentication scheme selected Apr 6, 2010 2:06:08 PM org.apache.commons.httpclient.HttpMethodDirector processW WWAuthChallenge INFO: No credentials available for BASIC 'exist'@kruddler.mitre.org:8081 How do I authenticate this connection ?

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  • Delete a div id using ajax and jquery and delete from DB

    - by Matt Nathanson
    I've got several div id's, each containing a different client. I want to be able to click the delete button and using ajax and jquery delete the specific div from the database. I'm getting success in AJAX but it's not deleting anything from the DB. And then obviously, upon deletion, I would like the container to reload dynamically. help!!! function DeleteClient(){ var yes = confirm("Whoa there chief! Do you really want to DELETE this client?"); if (yes == 1) { dataToLoad = 'clientID=' + clientID + '&deleteclient=yes', $.ajax({ type: 'post', url: '/clients/controller.php', datatype: 'html', data: dataToLoad, success: function(html) { alert('Client' + clientID + ' should have been deleted from the database.'); $('#clientscontainer').html(html); }, error: function() { alert('error'); }});}; };

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  • DB structure for Twitter home/Facebook wall?

    - by mathon12
    Basically a live feed of all your friends' recent posts. In a stupid sort of approach I think I'd start by building a query like: SELECT * FROM tblposts WHERE userid=friend_id_1OR userid=friend_id_2...... and so on Where friend_id_% is the userid of a friend from your friends list. But this must be a very inefficient way of doing it, right? Is there any faster way of doing this in MySQL? Maybe some clever DB schema? (I know FB uses Hadoob but I'm not experienced enough to go that far :( )

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  • access following entry in a form_for, and switch a value between two entry of my DB

    - by Sylario
    I am displaying a list of articles. I sort my articles by the param order, and i want, when displaying the list of article to be able to "move" them up or down. In php i do everything with a for browsing my array of results and inside the for i go to the next index to find where i am in the list, and with wich other article i must swap my order. I can do that in the script displaying the edit page and then in the script executing the update. In rails i have only my form_for in my erb. How can i : Know if my entry is the last one or the first one(display only V for the first, ^ for the last and V^ for the rest) Update my DB entry by switching the order value between the article that i want to lower, raise, and the one he is taking the place.

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  • Problem with rake db:migrate

    - by Shreyas Satish
    When I try rake db:migrate, I get the following error: !!! The bundled mysql.rb driver has been removed from Rails 2.2. Please install the mysql gem and try again: gem install mysql. rake aborted! no such file to load -- mysql And when I try to "gem install mysql" Building native extensions. This could take a while... ERROR: Error installing mysql: ERROR: Failed to build gem native extension. /usr/bin/ruby extconf.rb Can't find header files for ruby. Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/mysql-2.8.1 for inspection. I checked the rubygems folder and mysql gem has been installed. Any ideas? Cheers

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  • Error happening when running "rake db:create RAILS_ENV='development' "

    - by Dean
    Hi, I am getting this error in my terminal when i execute the command above, Deans-MacBook:depot dean$ rake db:create RAILS_ENV='development' (in /Users/dean/src/RailsBook/depot) Couldn't create database for {"username"=>"root", "adapter"=>"mysql", "database"=>"depot_development", "host"=>"localhost", "password"=>nil}, charset: utf8, collation: utf8_unicode_ci (if you set the charset manually, make sure you have a matching collation) In database config file i have the following: development: adapter: mysql database: depot_development username: root password: host: localhost I have the mysql gem installed and now i am unsure on what to do next. I am running snow leopard on a Macbook. Does anyone know why this error is happening? Thanks in Advance Dean

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  • How2 display Image from DB in datagrid?

    - by Saverio Tedeschi
    Hope it's not yet been answered, but I've googled for quite a long time, and I've not been able to get it working. In brief, I've a SL4 page with a DataGrid filled accordingly to parameters passed from the previous page, so I fill the context in code, with a "RIA" query (w/parameters as well). So far, so good. I get the XAML declared columns as expected but the Photo templated column, which holds just an image control. I think I can use the LoadingRow event, but can some1 give me some code on how to get my goal (image is in in the context from DB)? Thanks in advance

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  • What does this rake db:seed error mean?

    - by Kenji Kina
    I've been trying to solve this problem for a couple of hours but I can't seem to understand what's going on. I'm using Rails 3 beta, and want to seed some data to the database. However, when I try to seed some values through db:seed, I get this error: rake aborted! Attribute(#81402440) expected, got Array(#69024170) The seeds.rb is: DataType.delete_all DataType.create( :name => 'String' ) And I got these classes: class DataType < ActiveRecord::Base has_many :attributes end class Attribute < ActiveRecord::Base belongs_to :data_types end While the migration definition for DataType is merely: class CreateDataTypes < ActiveRecord::Migration def self.up create_table :data_types do |t| t.string :name t.timestamps end end def self.down drop_table :data_types end end Can anyone tell me what I'm doing wrong?

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