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• Tune Your Indexing Strategy with SQL Server DMVs

  SQL Server Indexes need to be effective. It is wrong to have too few or too many. The ones you create must ensure that the workload reads the data quickly with a minimum of I/O. As well as a sound knowledge of the way that relational databases work, it helps to be familiar with the Dynamic Management Objects that are there to assist with your indexing strategy. New! SQL Backup Pro 7.2 - easy, automated backup and restoresTry out the latest features and get faster, smaller, verified backups. Download a free trial.

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• Java Multithreading Challenge

  - by KJP

  Can someone explain or give an example on how to create multiple threads with different functionalities in JAVA?

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• Sum of distinc rows after a 1-many table join

  - by Lock

  I have 2 tables that I am joining. Table 1 has 1-many relationship with table 2. That is, table 2 can return multiple rows for a single row of table 1. Because of this, the records of table 1 is duplicated for as many rows as are on table 2.. which is expected. Now, I have a sum on one of the columns from table 1, but because of the multiple rows that get returned on the join, the sum is obviously multiplying. Is there a way to get this number back to its original number? I tried dividing by the count of rows from table 2 but this didnt quite give me the expected result. Are there any analytical functions that could do this? I almost want something like "if this row has not yet been counted in the sum, add it to the sum"

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• Creating a "Universities Attended" Profile field/block (Drupal)

  - by Frank0051

  Interesting question for everyone. So I have am thinking of adding a "university attended" field to the profile page of members in Drupal. I guess I am trying to figure out the best way to go about it. I was originally thinking of a text field, but than I thought you could get multiple instances of of university names, making it hard to sort people by school (ie. UF, University of Florida, Florida, U of F, etc). I then began to think about creating a drop down, but I wasn't quite sure where I could get a listing of all the schools. Perhaps I could find a database population that a site like LinkedIn or Facebook uses. Then I thought of what happens when someone has attended multiple schools, how would I account for that? So, I guess I wanted to pose the question of how would you go about adding a University(ies) attended field to profile pages if you had to design a site to do so?

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• MySQL: Selecting One Record When Others Have Same Data

  - by LoganFrederick

  I have a table of cities that all share the same area code: 367 01451 Harvard Worcester Massachusetts MA 978 Eastern 368 01452 Hubbardston Worcester Massachusetts MA 978 Eastern 369 01453 Leominster Worcester Massachusetts MA 978 Eastern The table has multiple area codes, all with multiple cities. What I'd like to do is only select one city from each area code and delete any extra cities from duplicate area codes. What would be the best query to accomplish this? I believe: http://stackoverflow.com/questions/596629/mysql4-sql-for-selecting-one-or-zero-record Is coming close to what I need but didn't quite get what/how those answers were working. Note The "978" row is the "area_code" row, table name is "zip_code".

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• best jquery multiselect plugin

  - by mazhar

  what is the best multiselect plugin(from which you can make multiple selection of the records ) you people used for the best user experience?

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• Getting Started with the SSAS Tabular Model

  SSAS Tabular models are in-memory databases that model data with relational constructs such as tables and relationships, in order to provide a rapid and powerful way of providing self-service BI to client applications such as Microsoft Excel and Microsoft Power View. You’ve deployed SSAS in tabular mode, and deployed Adventureworks into it. What next? Rob Sheldon explains all. Check SQL Server performance at a glanceWe consulted 1000 SQL Server professionals to make SQL Monitor’s UI as clear as possible. Start monitoring with a free trial.

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• Efficiency: what block size of kernel-mode memory allocations?

  - by Robert

  I need a big, driver-internal memory buffer with several tens of megabytes (non-paged, since accessed at dispatcher level). Since I think that allocating chunks of non-continuous memory will more likely succeed than allocating one single continuous memory block (especially when memory becomes fragmented) I want to implement that memory buffer as a linked list of memory blocks. What size should the blocks have to efficiently load the memory pages? (read: not to waste any page space) A multiple of 4096? (equally to the page size of the OS) A multiple of 4000? (not to waste another page for OS-internal memory allocation information) Another size? Target platform is Windows NT = 5.1 (XP and above) Target architectures are x86 and amd64 (not Itanium)

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• TSQL Challenge 82 - Find elements that uniquely make up a group

  The challenge is to find the Tax Code based on Price. Each sales amount is uniquely made up by the sum of one or more prices. Based on this you should assign the tax code to each price. Keep your database and application development in syncSQL Connect is a Visual Studio add-in that brings your databases into your solution. It then makes it easy to keep your database in sync, and commit to your existing source control system. Find out more.

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• How do I know, when my develpment skills is enough to do some "real" job?

  - by hjdm

  I am in proccess of constant learning web technologies now. I have know php, pure javascript ( I think, I can pick up jquery fast if needed ), html, css and basic crud with databases. I understand how MVC frameworks work. I have made a couple websites for friends ( one with my own engine ). Maybe it is time to try to do some interesting stuff for someone? ( say freelance or try to find some job in this industry ) Which expierence did you have, when you got your first job?

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• Eloquera Database 2.7.0 is released (native .NET object database)

  Eloquera ( www.eloquera.com ) originally designed and developed for use in the Web environment and its designed as native .NET application in C#. Eloquera wasnt ported from Java as many other databases. Eloquera natively as part of architecture supports: Save the data with a single line of code// Create the object we would like to work with. Movie movie = new Movie() { Location = "Sydney", Year = 2010, OpenDates = new DateTime[] { new DateTime(2003, 12, 10),...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• More complex learning source for C# .NET [closed]

  - by Leron

  By complex I don't mean more difficult but including a larger area of possibilities cover. I've started a few years ago with PHP and the transition from learning the syntax of the language and the basic logical structures to working with databases, including JavaScript and so on was very short. And now I'm more interested in studying working with languages like Java/C#. Recently I spend a lot of time reading and writing some simple console applications, I've read almost 2K pages for C# programming and still don't know how to connect to database for example. Just for info I'm interested in web development, socket programing and live streaming, don't know if I'm exceeding myself too much writing that but despite that I want to find some books/internet sources where I can extend my current knowledge of C#/.NET, start using database queries, maybe try something more complicated webwise.

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• Looking to create a website ... need assistance on what technologies to use!

  - by rsala004

  First off, My group and I don't have any experience with databases or anything of that sort, only programming (not web-programming), so this post is just me wondering what things I should start researching and possibly some referral to a hosting company. The abstract idea is to have a list of things, each categorized, and each item with user-submitted reviews (made by users who are signed up with the website). Would absolutely everything be stored on a SQL database? (the long text reviews for example) Does anyone have any suggestions on some 'web frameworks' we could use to jumpstart us? What should our absolute first step be? (I was thinking about first designing the basic database? so we have something to work around...?) Should we worry about which host we choose right now, any recommendations? (would it be a trivial task to switch hosts in the future?) Thanks again, any help is appreciated!

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• WPF datagrid issue

  - by martin

  Is it possible to set one or multiple rows' background color?

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• How can I animate between states in a programmatic skin? [FLEX]

  - by Lewis

  I have a button with the various states (up/over/down etc) that uses a skin file to render the display. I want to achieve animation between the states. For instance, between the change from 'up' to 'over' I want to fade in a color and a border. The way I am doing this at the moment is to use viewstates and animate between them using transitions and the mx:AnimateProperty. However, using this method I can only animate one property per viewstate. So only the border, or the color can be animated. Does anyone know how I can achieve multiple animations on multiple properties of a programmatic button skin? Thanks in advance! Note: I have looked into using tweener but cannot see how it would help my situation

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• The way to the future - Hybrid systems

  - by BuckWoody

  I've written before (as have others) about the dangers of an "either/or" mentality with various technologies, including the "cloud". Companies are starting to understand this message - I've been traveling a lot this year from Alaska to California, from the UK to Copenhagen, Denmark, talking with companies that are implementing Hybrid systems, and giving presentations on how to implement one. I'm doing another of these Monday of next week, in Boston here in the US. You can read about it and register here (it's a free event) and learn not only more about Hybrid systems using on-premises databases and Windows Azure, but more about SQL Server as well from other speakers.

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• How to model localized items

  - by tweir

  I'm currently designing a e-commerce solution. One of the primary requirements is for the store to support localized item details. The same store must be able to support multiple languages via the user's language selection and/or browser preference. I have two tables: Item (id, sku, price, ...) ItemDetails (item_id, language, title, ...) For each Item, there will be multiple rows corresponding to the item, where the (item_id,language) pair will be unique. I would like to model this as: class Item { public string sku; public double price; public ItemDetails Details; } Based on the user's session, I would like the items returned to have the Details object corresponds to the user's selected language (from their session). What are some approaches for representing this?

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• Calculating Values within a Rolling Window in Transact SQL

  Before the SQL Window functions were implemented, it was tricky to calculate rolling totals or moving averages efficiently in SQL Server. There are now a number of techniques, but which has the best performance? Dwain Camps gets out the metaphorical stopwatch. Get your SQL Server database under version control now!Version control is standard for applications, but databases haven’t caught up. So how can you bring database development up to speed? Why should you start? Find out…

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• Azure Service Bus Scalability

  - by phebbar

  I am trying to understand how can I make Azure Service Bus Topic to be scaleable to handle 10,000 requests/second from more than 50 different clients. I found this article at Microsoft - http://msdn.microsoft.com/en-us/library/windowsazure/hh528527.aspx. This provides lot of good input to scale azure service bus like creating multiple message factories, sending and receiving asynchronously, doing batch send/receive. But all these input are from the publisher and subscriber client perspective. What if the node running the Topic can not handle the huge number of transactions? How do I monitor that? How do I have the Topic running on multiple nodes? Any input on that would be helpful. Also wondering if any one has done any capacity testing with Topic/Queue and I am eager to see those results... Thanks, Prasanna

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• Java-Buffered reader

  - by Sinduja

  How to read from buffered reader simulataneously by multiple threads.

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• mysql questions for beginners

  - by ankhseeker

  ok, I have a few questions regarding mysql. I am currently running ubuntu 12.04.4 LTS command line version. I am looking for a database that I can use. I am confused at this point because I am uninformed. mysql is just one database that is on the server? or can it contain several or many databases What programs do I use to access it on the server or is it a vt-100 type access? I understand that mysql comes with lamp? or ubuntu. I am thinking that it is already installed but not sure how to access it, but that is another question for later. Outside of the man pages and the ubuntu manual, is there a site for its setup and use? Thanks!

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• How to organize Windows Phone code base to target both 7.x and 8 platforms

  - by ljubomir

  I took over a Windows Phone project which was previously targeting WP 7.1 platform, and with the recent announcement of the new platform it should target WP 8 as well. My VS 2010 solution consists on several projects (Data access, Model, Tests and WP7 client app) and i am wandering on how to include support for WP8. I have to note that the code-base is not compatible with WP8, due to usage of Toolkit controls and other 3rd party libraries targeted for WP7.1 specifically. Also there is another problem with the Visual Studio versions - WP7.1 can work with VS 2010, but WP8 requires VS 2012. Should i move the whole code-base to VS 2012? Any good advice on how to organize code-base in a most meaningful way in order to avoid duplication and possible painful maintenance? I am thinking between one solution - multiple projects vs. multiple solutions - reusable projects approach. Code duplication (like two separate folders/solutions) should be the least possible approach (fallback).

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• Lyrics on mp3 ID-tag

  - by puchrojo

  Since a few years ago I stopped listening to CDs and began to listen to mp3 only. At the begining I continued to buy the CDs to support the artist, but later I started to buy the album direct online as mp3. The problem is, that by this, I don't have the lyrics for the songs. For the "commercial" or popular music it is not a big problem, but for others there are no lyrics on the Internet. How can I make use of the ID3-tag for the lyrics? Is there a music store that adds lyrics to the mp3 files sold? Can this be done with Ubuntu One? Another alternative would be to have an Internet lyrics databases like musixmatch.com supported.

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• How to use ccache selectively?

  - by Anonymous

  I have to compile multiple versions of an app written in C++ and I think to use ccache for speeding up the process. ccache howtos have examples which suggest to create symlinks named gcc, g++ etc and make sure they appear in PATH before the original gcc binaries, so ccache is used instead. So far so good, but I'd like to use ccache only when compiling this particular app, not always. Of course, I can write a shell script that will try to create these symlinks every time I want to compile the app and will delete them when the app is compiled. But this looks like filesystem abuse to me. Are there better ways to use ccache selectively, not always? For compilation of a single source code file, I could just manually call ccache instead of gcc and be done, but I have to deal with a complex app that uses an automated build system for multiple source code files.

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• Migrating RISC to x86 - endianess 'issue'

  - by llaszews

  Endianess always comes up when migrating applications and databases from RISC to x86. The issue is often time overblown as if you are running on a relational database the database vendor will provide tools or automated methods to convert the data properly. Oracle RMAN is often the first choice. Oracle imp/exp, data pump, and GoldenGate can also be used. Migrating to Linux on Dell A bigger issue would be applications that access OS files. These OS files will need to be converted from big endian (RISC) to little endian (CISC) and then the application may be impacted because of the endianess differences.

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