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• Fluent Nhibernate napping to existing database with primary key in joining table of a many to many r

  - by Todd

  I have an existing database with a many to many relationship however the joining table has a primary key ID and 2 foreign keys to do the join. Is it possible to configure the mapping files to handle this? at the moment i am stuck. Thanks

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• How to prevent updating duplicate rows in SQLite Database?

  - by CSharperWithJava

  I'm inserting new rows into a SQLite table, but I don't want to insert duplicate rows. I also don't want to specify every column in the database if possible. I don't even know if this is possible. I should be able to take my values and create a new row with them, but if they duplicate another row they should either overwrite the existing row or do nothing.

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• How can i learn Table Name in database an column name?

  - by Phsika

  How can i learn table Name in database an how can i learn any Table's Column name? SELECT Col.COLUMN_NAME, Col.DATA_TYPE FROM INFORMATION_SCHEMA.COLUMNS AS Col LEFT OUTER JOIN INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE AS Usg ON Col.TABLE_NAME = Usg.TABLE_NAME AND Col.COLUMN_NAME = Usg.COLUMN_NAME LEFT OUTER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS AS Con ON Usg.CONSTRAINT_NAME = Con.CONSTRAINT_NAME WHERE Col.TABLE_NAME = 'Addresses_Temp' AND Con.Constraint_TYPE = 'PRIMARY KEY' But it returns to me empty data:(

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• How can I frequently/automatically compare the structure of the same Database?

  - by Pitming

  Does anyone know a tool that automatically compares the structure of a database and gives a report of what was changed? If it can be integrated into a CruiseControl, even better. By structure I also mean functions and stored procedures. Which is probably not clear at first sight ;-) The idea was to integrate that into a cruise control server

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• Make a final call to the Database when user leaves website (ASPX)?

  - by Jisaak

  I have a system set up to lock certain content in a database table so only one user can edit that content at a time. Easy enough and that part is working fine. But now I'm at a road block of how to send a request to "unlock" the content. I have the stored procedure to unlock the content, but how/where would I call it when the user just closes their browser?

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• VS2010 Database Compare. How do you create a *.DBSchema extensioned file?

  - by George

  I'd like to take a snapshot of my database, make some changes and then use the db compare functionality to identify the changes, and who knows, maybe even generate scripts to make the change. I'd like to avoid having to backup the current db and restore it as a separate db just to have a "before" snapshot. I'm guessing I shouldn't have to. Obsviously, I'm clueless about db projects and am looking to be pointed in the right direction. ty!

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• How to use C# to parse a glossary into database?

  - by Yaaqov

  This should be a simple one, but I'm a beginner with C#. Given a glossary list in the following format: aptitude ability, skill, gift, talent aqueous watery arguably maybe, perhaps, possibly, could be How can I parse this, and insert into a database table in the format: TABLE: Term_Glossary ================================================ Term_Name | Term_Definition | ================================================ aptitude | ability, skill, gift, talent | ------------------------------------------------ aqueous | watery | ------------------------------------------------ arguably | maybe, perhaps, possibly, could be| ================================================ Any help would be appreciated - thanks.

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• How to convert rows of a database query to a XML file?

  - by EASI

  I am developing a Delphi application that needs to pick up the rows from a period of work and convert them to a single XML file in order to upload to a 3rd party web-service. Is there any component or library available to do that? If not, what is the best approach of code to build that DB2XML conversor? I noticed that most XML questions are about how to convert it to another type of data. Note: the database will be MySQL or Firebird.

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• How to use Triggers for Logging History of database change in MySQL?

  - by Parth

  How to use Triggers for Logging History of database change in MySQL? If yes, then is it possible to create a sepearte db for trigger tables for tracking history of other Db tables??

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• Is there a "best" or more popular database for standalone Java app?

  - by Tom Brito

  Is there a "best" or more popular database for standalone Java app? I'm currently writing by hand, but I would like to know what is commonly done, if there is something that is commonly done.

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• How to load 1 milion records from database fast?

  - by Leonard P.

  Now we have a firebird database with 1.000.000 that must be processed after ALL are loaded in RAM memory. To get all of those we must extract data using (select * first 1000 ...) for 8 hours. What is the solution for this?

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• Do you know a database written in Perl with DBI interface?

  - by Aftershock

  Hi, Do you know a database written in Perl with DBI interface? Or what can be used if there is no MySql or Postgresql installed? Thank you.

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• With database table design, Is there an advantage of using special naming convention for a Many-to-m

  - by Jian Lin

  Whenever there is a many-to-many relationship, I think there will be immediately a many-to-many table needed (also called a junction table). Is there any advantage of using special naming convention for these tables, as opposed to the other 1 to many tables? Or are there popular special naming conventions used by companies designing database tables?

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• How can I create a model in Powerdesigner which can generate create script for different database?

  - by MemoryLeak

  I just want to create the model once, and then use it in any kind of database, without the need to modify the model. What I should do with the data type ? I found there is numeric and other kind of data types. What does that correspond to in mysql or access ?

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• Is it possible to insert multiple rows at a time in an SQLite database?

  - by Andrew

  In MySQL you can insert multiple rows like this: INSERT INTO 'tablename' ('column1', 'column2') VALUES ('data1', 'data2'), ('data1', 'data2'), ('data1', 'data2'), ('data1', 'data2'); However, I am getting an error when I try to do something like this. Is it possible to insert multiple rows at a time in an SQLite database? What is the syntax to do that?

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• IOC are at the class level, but what about database conflicts?

  - by mrblah

  With IOC I understand you can substitue implementations out by merely editing a configuration file etc. BUT, what happens when the classes are married to particular database tables and sprocs, you can't just swap out an implementation since the classes/entities are tied to particular tables and stored procedures. Am I right here?

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• How do you store a trie in a relational database?

  - by blank

  I have a prefix trie. What is the recommended schema for representing this structure in a relational database? I need substring matching to remain efficient.

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• How do you find out which database links are used in queries for the Oracle RDBMS?

  - by JavaRocky

  I would like to find out if any and which database links are being used, for a schema, and in which tables. Is it possible via the data dictionary somehow? Is this possible with the Oracle RDBMS?

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• How to monitor the change of the database so as to flush the treeview?

  - by jack

  target: whenever the table in the database changes, the treeview will reload the new contents of the table. Is there any good methods to solve this problem? thank u

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• Java: Storing information from database. What collections are appropriate?

  - by garvy

  I write an application in Java. I get form a database a table (clients) which contains fields like: name | surname | adress What is the best solution to store this data in my app? Should I create an object for each client and store these objects in a list or set? The table contains about 100 records and it's already sorted. Thanks in advance.

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• Why use your application-level cache if database already provides caching?

  - by vsb

  Modern database provide caching support. Most of the ORM frameworks cache retrieved data too. Why this duplication is necessary?

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• What is the best way to store a date without a year in SQL database?

  - by Mike

  I am building an app that has a daily quote that should be stored in the database. Each quote is assigned with a day of the year, including one for Feb 29th. Since the quote only cares about the day not the year should I still use smalldatetime type? Please let me know your opinions, thanks!!

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• ASP.NET MVC 2 Localization/Globalization stored in the database?

  - by richburns

  Hello I've been searching for a while for a good example of localizing an C# ASP.NET MVC 2 application but storing the data in the database instead of .RESX files. Unfortunately I've had no luck finding a good example and was hoping someone else may know and could point me in the right direction? Many thanks for any help/advice/articles

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• Wikipedia style article, how should I design my database?

  - by newbie

  I need to make article that cannot be edited, but it can be saved as a new version and only the newest version is shown to users. How should I implement this kind of database design?

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• How do I get records from the database for a particular interval?

  - by Vishal

  My table has records for every minute (for instance the column name is date), now I want to fetch records with an interval of 5 minutes! Can it be done at database level? I am using Django with MySQL

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