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  • Cannot figure out how to take in generic parameters for an Enterprise Framework library sql statemen

    - by KallDrexx
    I have written a specialized class to wrap up the enterprise library database functionality for easier usage. The reasoning for using the Enterprise Library is because my applications commonly connect to both oracle and sql server database systems. My wrapper handles both creating connection strings on the fly, connecting, and executing queries allowing my main code to only have to write a few lines of code to do database stuff and deal with error handling. As an example my ExecuteNonQuery method has the following declaration: /// <summary> /// Executes a query that returns no results (e.g. insert or update statements) /// </summary> /// <param name="sqlQuery"></param> /// <param name="parameters">Hashtable containing all the parameters for the query</param> /// <returns>The total number of records modified, -1 if an error occurred </returns> public int ExecuteNonQuery(string sqlQuery, Hashtable parameters) { // Make sure we are connected to the database if (!IsConnected) { ErrorHandler("Attempted to run a query without being connected to a database.", ErrorSeverity.Critical); return -1; } // Form the command DbCommand dbCommand = _database.GetSqlStringCommand(sqlQuery); // Add all the paramters foreach (string key in parameters.Keys) { if (parameters[key] == null) _database.AddInParameter(dbCommand, key, DbType.Object, null); else _database.AddInParameter(dbCommand, key, DbType.Object, parameters[key].ToString()); } return _database.ExecuteNonQuery(dbCommand); } _database is defined as private Database _database;. Hashtable parameters are created via code similar to p.Add("@param", value);. the issue I am having is that it seems that with enterprise library database framework you must declare the dbType of each parameter. This isn't an issue when you are calling the database code directly when forming the paramters but doesn't work for creating a generic abstraction class such as I have. In order to try and get around that I thought I could just use DbType.Object and figure the DB will figure it out based on the columns the sql is working with. Unfortunately, this is not the case as I get the following error: Implicit conversion from data type sql_variant to varchar is not allowed. Use the CONVERT function to run this query Is there any way to use generic parameters in a wrapper class or am I just going to have to move all my DB code into my main classes?

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  • upsert with addition

    - by cf_PhillipSenn
    How would you write the following in Microsoft SQL Server 2008? IF EXISTS(SELECT * FROM Table WHERE Something=1000) UPDATE Table SET Qty = Qty + 1 WHERE Something=1000 ELSE INSERT INTO Table(Something,Qty) VALUES(1000,1)

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  • Advanced count and join in Rails

    - by trobrock
    I am try to find the top n number of categories as they relate to articles, there is a habtm relationship set up between the two. This is the SQL I want to execute, but am unsure of how to do this with ActiveRecord, aside from using the find_by_sql method. is there any way of doing this with ActiveRecord methods: SELECT "categories".id, "categories".name, count("articles".id) as counter FROM "categories" JOIN "articles_categories" ON "articles_categories".category_id = "categories".id JOIN "articles" ON "articles".id = "articles_categories".article_id GROUP BY "categories".id ORDER BY counter DESC LIMIT 5;

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  • Do non-clustered indexes slow down inserts?

    - by mikeinmadison
    I'm working in Sql Server 2005. I have an event log table that tracks user actions, and I want to make sure that inserts into the table are as fast as possible. Currently the table doesn't have any indexes. Does adding a single non-clustered index slow down inserts at all? Or is it only clustered indexes that slow down inserts? Or should I just add a clustered index and not worry about it?

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  • .NET Data Provider for SqlServer

    - by DMcKenna
    Has anybody managed to get the ".NET Data Provider for SqlServer" to actually work within perfmon.exe. I have a .NET app that uses nhibernate to interact with sql server 2005 db. All I want to do is to view the NumberOfActiveConnectionPools, NumberOfActiveConnections and the NumberOfFreeConnections within perfmon.exe Can somebody explain to me how exactly I get this to work? Regards, David

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  • MVC-like Autogenerated Pages for Webforms

    - by CccTrash
    I noticed that MVC lets you pass in LINQ to SQL objects to its views and it will autogenerate Create, Update and View Pages based on the LINQtoSQL object. Is there anything for webforms that lets you do this kind of thing? (In a nice way with validators maybe?)

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  • Is defragging tough on replication?

    - by Jim
    I've been told that defragging causes the log to grow tremendously. Is this true? If so, is there something better to do than defragging that will not impact the log as much? We are running SQL Server 2005 replicating between 2 sites.

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  • How to group a database write and spreadsheet write in single "transaction"

    - by WhyGeeEx
    I have a Java program that writes results to both a DB (SQL Server) and a spreadsheet (POI), and it would be best if neither is written to if there's an error with either. It would be a lot worse if the spreadsheet was produced and then an error happened while saving to the DB, so I'm doing the DB-write first. Even so, I'm wondering if someone knows of a way to guarantee they both succeed or fail as a unit. Thanks!

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  • java.sql.SQLException: database locked

    - by rajkumari
    Hello We are using sqllite056 jar in our code. While inserting into database in batch we are getting exception on line when we going to commit. Lines of Code <object of Connection> .commit(); <object of Connection>.setAutoCommit(true); Exception java.sql.SQLException: database locked

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  • How do I select distinct rows where a column may have a number of the same values but all their 2nd

    - by Martin Rose
    I have a table in the form: test_name| test_result | test1 | pass | test2 | fail | test1 | pass | test1 | pass | test2 | pass | test1 | pass | test3 | pass | test3 | fail | test3 | pass | As you can see all test1's pass while test2's and test3's have both passes and fails. Is there a SQL statement that I can use to return the distinct names of the tests that only pass? E.g. test1

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  • Table Valued UDF vs Views

    - by vaibhav
    I have never used UDF in sql server. Today I got to know that we can have functions which can return a table. So I just wanted to know can I use functions in place of views. If yes, which one is the better choice and why

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  • Sqlalchemy complex in_ clause

    - by lostlogic
    I'm trying to find a way to cause sqlalchemy to generate sql of the following form: select * from t where (a,b) in ((a1,b1),(a2,b2)); Is this possible? If not, any suggestions on a way to emulate it? Thanks kindly!

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  • [ADO.NET ERRROR]: CREATE DATABASE permission denied in database 'master'. An attempt to attach an au

    - by Mark Cidade
    Anyone seen this before? CREATE DATABASE permission denied in database 'master'. An attempt to attach an auto-named database for file C:\Documents and Settings\..\App_Data\HelloWorld.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share. I'm asking on a friend's behalf. I've sent him these links: http://blog.benhall.me.uk/2008/03/sql-server-and-vista-create-database.html http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=702726&SiteID=1

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  • Frequent error in Oracle ORA-04068: existing state of packages has been discarded

    - by martilyo
    Hi, We're getting this error once a day on a script that runs every two hours, but at different times of the day. ERROR at line 1: ORA-04068: existing state of packages has been discarded ORA-04061: existing state of package body "PACKAGE.NAME" has been invalidated ORA-06508: PL/SQL: could not find program unit being called: "PACKAGE.NAME" ORA-06512: at line 1 Could someone list what conditions can cause this error so that we could investigate? Thanks. UPDATE: Would executing 'ALTER SESSION CLOSE DATABASE LINK DBLINK' invalidate a state of the package?

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  • Auto generate varchar Ticket number via DB...

    - by Rusty
    Hello, I'm looking for suggestion on how to get the DB to auto generate Ticket numbers (preferably via the SQL DB) for a varchar column. I have the following tables in the DB: Activities & Cases and would prefer the format to be "Act000001" or "Cse000001". This would be something similar to the identity column property. Any suggestion would be highly appreciated. Thanks. Rusty

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  • ColdFusion Security

    - by Andrew
    What are the best practices for securing a coldfusion webpage from malicious users? (including, but not limited to, sql injection attacks) Is cfqueryparam enough?

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  • can use more than 1 column in MySQL Group BY?

    - by Am1rr3zA
    Hi, I want write these SQL Query: CREATE VIEW `uniaverage` AS select `averagegrade`.`mjr`,`averagegrade`.`lev` , avg(`averagegrade`.`average`) AS `uniAVG` from `averagegrade` group by `averagegrade`.`lev`, `averagegrade`.`mjr`; But MySQL Query Browser give this error: Operand Should Contain 1 column(s) I somewhere read can use group by on more than 1 column!!! How can I solve this error? or how can I change the Query to get the same result?

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