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• MySQL Master/Slave with Castle Activerecord

  - by Kynth

  I have an existing web application using Castle Activerecord to interact with a single MySQL database. The Database has recently been reconfigured to replicate to a number of Slaves. How do you configure Castle Activerecord to direct writes to the MySQL Master and reads to the MySQL Slaves?

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• Advantages of SQLServer vs. MySQL for C#/.NET4 Cloud Applications

  - by Ed Eichman

  I am considering building several C#/.NET4 applications all using a central, cloud based database. In addition, several LAMP (MySQL) web shops will be accessing the cloud DB. MySQL is the database that I'm most familiar with, and my default selection for the cloud DB would be MySQL on Amazon or Joyent. However, I was wondering what development "extras" are available for SQLServer in VisualStudio 2010 that are not available for MySQL. Are there any "killer features" that should make me consider SQLServer instead of MySQL?

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• Conditional Join In LINQ?

  - by Soo

  I am trying to write a query that grabs information from one database and joins it to information in a different database. TableA idA valueA idB TableB idB valueB The tricky part is that in TableA, idB isn't always defined, so when I do a normal join, I only get results where TableA has a idB value. What I want is to be able to grab all of the information from TableA even if it doesn't have a corresponding idB value.

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• Programmatically creating linked tables in access

  - by newtoaccess

  Hi all, We need to find a way to programatically *link all the tables* in a SQL Server database to an access db. We will be invoking this access database from a program that uses .net/SQL Server 2008. While invoking the application we would like to add the linked tables so that the users can just run the reports/modules from access without having to worry about linking the tables. Is there a way we can do this? Thanks!

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• Chain of Responsibility Pattern: is it a good practice to have interdependent handlers?

  - by wei

  I have this scenario: I have a chain of query handlers, the first is to query the cache, if the cache can't answer it or the answer is stale, then hit a database, if it can't find the answer or the answer is stale again, then query a remote web service. But I am not sure if this is the right way to use this pattern, since the work flow is pretty much fixed, and the cache and database handlers depend on the next step's return result to refresh its records.

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• how to connect asp.net Crystal report with mysql.

  - by Ayyappan.Anbalagan

  how to connect asp.net Crystal report with mysql database. like sql server database connection .is there any connector available to do this..

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• jQuery AutoComplete with three levels of suggestions?

  - by Meitham

  I am building a django based application and its time to add the DHTML stuff. One of my fields represent a database field with this format databaseName.tableName.fieldName I would like to have javascript autocompletion in three levels, say once I type part of the database names I get a list of all matching databases, one that is selected I get a list of all tables, and once that is selected I get a list of all fields in that table, all in the same textfield. Any help would be appreciated. Thanks M

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• Oracle Cursor and JDBC ODBC

  - by BeginnerAmongBeginners

  I have some procedures to execute in the database that has an OUT REFCURSOR parameter. When I am connecting with the JDBC thin client, everything works fine. However, if I were to change the connection string to refer to the ODBC data source pointing to the same database, those procedures will fail. The procedures that do not use an OUT REFCURSOR will still work fine though. Is this situation the result of an error on my part or expected?

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• Using Volume Shadow Copy Service OK for backing up SQL Server Compact?

  - by Troy

  Would one expect a backup of a SQL Server Compact database file created with Volume Shadow Copy Service expected to be consistent? I know the big SQL Server has a VSS writer to ensure consistency. If a connection is writing out to a SQL Server Compact database could the file be backed up in a inconsistent state?

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• Cast IEnumerable<Inherited> To IEnumerable<Base>

  - by david2342

  I'm trying to cast an IEnumerable of an inherited type to IEnumerable of base class. Have tried following: var test = resultFromDb.Cast<BookedResource>(); return test.ToList(); But getting error: You cannot convert these types. Linq to Entities only supports conversion primitive EDM-types. The classes involved look like this: public partial class HistoryBookedResource : BookedResource { } public partial class HistoryBookedResource { public int ResourceId { get; set; } public string DateFrom { get; set; } public string TimeFrom { get; set; } public string TimeTo { get; set; } } public partial class BookedResource { public int ResourceId { get; set; } public string DateFrom { get; set; } public string TimeFrom { get; set; } public string TimeTo { get; set; } } [MetadataType(typeof(BookedResourceMetaData))] public partial class BookedResource { } public class BookedResourceMetaData { [Required(ErrorMessage = "Resource id is Required")] [Range(0, int.MaxValue, ErrorMessage = "Resource id is must be an number")] public object ResourceId { get; set; } [Required(ErrorMessage = "Date is Required")] public object DateFrom { get; set; } [Required(ErrorMessage = "Time From is Required")] public object TimeFrom { get; set; } [Required(ErrorMessage = "Time to is Required")] public object TimeTo { get; set; } } The problem I'm trying to solve is to get records from table HistoryBookedResource and have the result in an IEnumerable<BookedResource> using Entity Framework and LINQ. UPDATE: When using the following the cast seams to work but when trying to loop with a foreach the data is lost. resultFromDb.ToList() as IEnumerable<BookedResource>; UPDATE 2: Im using entity frameworks generated model, model (edmx) is created from database, edmx include classes that reprecent the database tables. In database i have a history table for old BookedResource and it can happen that the user want to look at these and to get the old data from the database entity framework uses classes with the same name as the tables to receive data from db. So i receive the data from table HistoryBookedResource in HistoryBookedResource class. Because entity framework generate the partial classes with the properties i dont know if i can make them virtual and override. Any suggestions will be greatly appreciated.

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• need some tips about distributed c# desktop application

  - by amipax

  Hi , my doubt is the following, I have a network with 5 pcs, each machine has XP installed, I don't know much about distributed desktop applications, so what i want is to create a C# application using sql server 2005 database and visual studio 2008. I want that each pc can have access to create/update/delete data on the one XP machine that will store the database files. Do i need WServer2003 or any special network technology?? thanks in advance

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• Stored Procedure could not be found

  - by Beatles1692

  We use SQL server 2008 as our RDBMS and we have a database that has a different user rather than dbo as its owner. The problem is in one machine a stored procedure can not run unless its owner is mentioned. If we connect to our database using this user and try to execute the following : exec ourSP we get a "could not find ourSP" error but this works fine: exec user.ourSP Does anybody knows what can lead to such a strange behavior?

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• MS SQL SERVER BACKUP Issue

  - by Dhivagar

  In sql server 2008, i have taken Full backup type of my database and database was successfully done.My question is while restoring it how can i check or know that my whole backup was perfect ?

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• Passing around a SqlConnection

  - by Chris

  I have created a TransactionScope and within the scope various items are created and updated in the database. During this process I make a lot of calls to the database. Originally I opened a SqlConnection in the beginning of the TransactionScope and passed it around to any function that made a DB call then I closed the connection after all the calls are made and before the transaction commits. Is it better to do this or to open and close a connection for each call?

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• Best migration plugin in grails?

  - by tapioco123

  I come to grails from rails. I need a database migration tool similar to the rails migration. I need to keep always updated the database (schema and data) for the webapp that i ship. Any hint?

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• java jsp : connecting to sql server tutorial?

  - by phill

  Can anyone recommend a tutorial on how to write a java servlet which connects to ms sql server and manages data? I'm trying to write something which pulls products out of one database and inserts them into a stored procedure located on another database. thanks in advance

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• Ajax: Partial refresh of a parent page (update a div) from "lightbox" window

  - by superUntitled

  Is there a way to update information in a div of a parent page from a pop-up/"lightbox" window. I would like to create a pop up window that contains a form that updates a database (currently i am using php/mysql with prototype). In other words... I would like a user to be able to use a form in a popup window to update the database, and the changes that are made to be shown on the parent page without that parent page being refreshed. Thanks.

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• Ignore first line on csv parse Rails

  - by Jack

  Hi, I am using the code from this tutorial to parse a CSV file and add the contents to a database table. How would I ignore the first line of the CSV file? The controller code is below: def csv_import @parsed_file=CSV::Reader.parse(params[:dump][:file]) n = 0 @parsed_file.each do |row| s = Student.new s.name = row[0] s.cid = row[1] s.year_id = find_year_id_from_year_title(row[2]) if s.save n = n+1 GC.start if n%50==0 end flash.now[:message] = "CSV Import Successful, #{n} new students added to the database." end redirect_to(students_url) end

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• help req for subsonic

  - by Muhammad Afaq Toufiq

  i m using subsonic with sqlserver its working fine. now my boss say donnt use sqlserver use Oracle database in app config For sqlserver -- now wat changes for oracle database req in app.cof ??? plz help me thanx in advance.

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• How to use pg_restore, getting error

  - by Roland

  I made a dump of a postgres database and I want to create the database on my localmachine. I'm trying to use pg_restore My command pg_restore db.sql and then I get this error pg_restore: [archiver] input file does not appear to be a valid archive What am I doing wrong? Operating sytem Ubuntu 9.10

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• Where does the AccountController in Asp.Net MVC 2 store its data?

  - by JLago

  I'm creating a website using ASP.NET MVC 2 and I'm thinking of using the default AccountController and Views to take care of the Users. The only problem is that, for all the rest, I'm using a Postgres database. Is there a way to link The account controller to a User class defined by me? I'm using Nhibernate to connect to the database, so I'll have a User class with whatever fields necessary. Thanks very much.

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• applescript for sqlite

  - by user1212108

  I have a Windows app called via Shell from MS Word that reads and writes to Sqlite. I'm porting it to Mac. On windows I have a batch file: SQLite3.exe pathtodb\databasename <sqlitecommands.txt This batch calls the Sqlite command line program, attachs the database, and reads the command from sqlitecommands.txt. The sqlitecommands is dynamically modified(by Word VBA) to read (Select) Write (Update) to/from the database. What is the format of an applescript to do the same thing in Mac OSX?

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• Android: SQLite content accessing error

  - by vnshetty

  I've following code, it gives run time error as below... why? try{ String myPath = DB_PATH + DB_NAME; mDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY); }catch(SQLiteException e){} Runtime Error: :sqlite returned: error code = 1, msg = no such table: android_metadata :SELECT locale FROM android_metadata failed :Failed to setLocale() when constructing, closing the database :android.database.sqlite.SQLiteException: no such table: android_metadata

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• Alternatives of Datatable

  - by mavera

  In my web application, I have a dynamic query that returns huge data to datatable, and this query is often recalled with different parameters. So database is exhausted. I want to get all record with no parameters to an object, and perform queries (may be with linq) on this object. So database will not be exthausted. Which objects can be used instead of datatable?

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• Maintain case sensitivity when importing db into windows

  - by razass

  I have an export from a MYSQL database on a linux machine however when importing that database into MYSQL on windows all of the table names that were camel cased are now all lower case. The sql dump has the correct case in it but the importing via phpmyadmin seams to remove these. How can I import it and keep the case? Thanks

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