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Search found 333 results on 14 pages for 'historical'.

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  • Why the Select is before the From in a SQL Query?

    - by Scorpi0
    This is something that bothered me a lot at school. 5 years ago, when I learned SQL, I always wondered why we specify first the fields we want and then where we want them from. According to my idea, we should write: From Employee e Select e.Name So why the norm says: Select e.Name -- Eeeeek, what e means ? From Employee e -- Ok, now I know what e is It took me weeks to understand SQL, and I know that a lot of that time was consumed by the wrong order of elements. It is like writing in C#: string name = employee.Name; var employee = this.GetEmployee(); So, I assume that it has a historical reason, anyone knows why?

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  • Hybrid Columnar Compression

    - by user12620172
    You heard me in the past talk about the HCC feature for Oracle databases. Hybrid Columnar Compression is a fantastic, built-in, free feature of Oracle 11Gr2. One used to need an Exadata to make use of it. However, last October, Oracle opened it up and now allows it to work on ANY Oracle DB server running 11Gr2, as long as the storage behind it is a ZFSSA for DNFS, or an Axiom for FC. If you're not sure why this is so cool or what HCC can do for your Oracle database, please check out this presentation. In it, Art will explain HCC, show you what it does, and give you a great idea why it's such a game-changer for those holding lots of historical DB data. Did I mention it's free? Click here: http://hcc.zanghosting.com/hcc-demo-swf.html

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  • Enhancing Enterprise Planning and Forecasting Through Predictive Modeling

    Planning and forecasting performance in today's volatile economic environment can be challenging with traditional planning applications and manual modeling techniques. To address these challenges, leading edge companies are leveraging predictive modeling to bring statistical analysis and techniques such as Monte Carlo simulations into the mix. Sound too math-intense and complicated? Not anymore. These techniques can be applied by anyone - no prior stats experience required - whether to augment the forecasting performed by line managers or to validate those forecasts based on historical information, and to produce a broader range of scenarios to consider in decision-making.

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  • Programming a trading strategy

    - by Rob
    Excuse me if I'm not descriptive enough, as I do not have much of a background when it comes to these things: How would I go about coding a primitive trading strategy and link it to some sort of artificial trading environment? Where do I start, and what are some other essential questions I should be asking? I am interested more in doing this because it interests me than making returns. Ideally it utilizes random/historical market data and doesn't actually execute any real trades. My background: I'm almost done my undergrad degree in computer science, and have had intro finance and economic courses. Familiar mostly with C and Java.

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  • Why was Tannenbaum wrong in the Tannenbaum-Torvalds debates?

    - by Robz
    I was recently assigned reading from the Tannenbaum-Torvalds debates in my OS class. In the debates, Tannenbaum makes some predictions: Microkernels are the future x86 will die out and RISC architectures will dominate the market (5 years from then) everyone will be running a free GNU OS I was a 1 year old when the debates happened, so I lack historical intuition. Why have these predictions not panned out? It seems to me, that from Tannenbaum's perspective, they're pretty reasonable predictions of the future. What happened so that they didn't come to pass?

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  • Why was Tanenbaum wrong in the Tanenbaum-Torvalds debates?

    - by Robz
    I was recently assigned reading from the Tanenbaum-Torvalds debates in my OS class. In the debates, Tanenbaum makes some predictions: Microkernels are the future x86 will die out and RISC architectures will dominate the market (5 years from then) everyone will be running a free GNU OS I was a one year old when the debates happened, so I lack historical intuition. Why have these predictions not panned out? It seems to me, that from Tanenbaum's perspective, they're pretty reasonable predictions of the future. What happened so that they didn't come to pass?

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  • why was tannenbaum wrong?

    - by Robz
    I was recently assigned reading from the Tannenbaum-Torvalds debates in my OS class. In the debates, Tannenbaum makes several predictions: Microkernels are the future x86 will die out and RISC architectures will dominate the market (5 years from then) everyone will be running a free GNU OS I was a 1 year old when the debates happened, so I lack historical intuition. Why have these not panned out? It seems to me that from Tannenbaum's perspective, they're pretty reasonable predictions of the future. What happened so that they didn't come to pass?

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  • Convert Doxygen to XML comments

    - by jmster
    We have a C# project which for historical reasons uses both Doxygen and Visual Studio style comments in the same code. Has anyone tried to systematically translate one standard to another, preferably to the common XML subset? I guess it would not be too difficult to write a script to cover the most common features, but I would not like to reinvent the wheel.

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  • Google finance quotes search box

    - by user271785
    Trying to implement a web service which should have exactly the same function as http://www.google.com/finance the search quotes box when user type the stock name or company name, the right stock name is suggested while typing. my service will using historical information from google finance, so get proper quote name from google is a must! anyone knows where i could find this quote list through google finance api? better with python. or anyone can suggest some ideas please? many thanks

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  • How to implement Xml Serialization with inherited classes in C#

    - by liorafar
    I have two classes : base class name Component and inheritd class named DBComponent [Serializable] public class Component { private string name = string.Empty; private string description = string.Empty; } [Serializable] public class DBComponent : Component { private List<string> spFiles = new List<string>(); // Storage Procedure Files [XmlArrayItem("SPFile", typeof(string))] [XmlArray("SPFiles")] public List<string> SPFiles { get { return spFiles; } set { spFiles = value; } } public DBComponent(string name, string description) : base(name, description) { } } [Serializable] public class ComponentsCollection { private static ComponentsCollection instance = null; private List<Component> components = new List<Component>(); public List<Component> Components { get { return components; } set { components = value; } } public static ComponentsCollection GetInstance() { if (ccuInstance == null) { lock (lockObject) { if (instance == null) PopulateComponents(); } } return instance; } private static void PopulateComponents() { instance = new CCUniverse(); XmlSerializer xs = new XmlSerializer(instance.GetType()); instance = xs.Deserialize(XmlReader.Create("Components.xml")) as ComponentsCollection; } } } I want read\write from a Xml file. I know that I need to implement the Serialization for DBComponent class otherwise it will not read it.But i cannot find any simple article for that. all the articles that I found were too complex for this simple scenario. The Xml file looks like this: <?xml version="1.0" encoding="utf-8" ?> <ComponentsCollection> <Components> <DBComponent Name="Tenant Historical Database" Description="Tenant Historical Database"> <SPFiles> <SPFile>Setup\TenantHistoricalSP.sql</SPFile> </SPFiles> </DBComponent> <Component Name="Agent" Description="Desktop Agent" /> </Components> </ComponentsCollection> Can someone please give me a simple example of how to read this kind of xml file and what should be implemented ? Thanks Lior

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  • Why has anybody ever used COBOL?

    - by sarzl
    I know: You and me hate COBOL. I took a look at a lot of code examples and it didn't take me long to know why everybody tries to avoid it. So I really have no idea: Why was COBOL ever used? I mean: Hey - there was Fortran before it, and Fortran looks like a jesus-language compared to COBOL. This isn't argumentative but historical as I'm young and didn't even know about COBOL before 4 months.

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  • loading data into rails applicaton

    - by ash34
    Hi, I have a list of rows in an excel sheet which I need to load as historical transactions into a table in my rails applications. I saved the excel file as a csv file. I tried using csv from the standard library but keep getting the following exception CSV::IllegalFormatError. Not sure how to even figure out where the problem lies. Any suggestions on how to do this. thanks, ash

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  • Lisp-style quotation in HTML

    - by InClj
    In Lisp, evaluating '(+ 1 2) produces '(+ 1 2), not 3. It seems that HTML doesn't support Lisp-style quotation so you can't say something like <quote><b>not bold</b</quote in HTML and let it just produce <b>not bold</b instead of not bold. Is there any technical reason or historical reason for that? Thanks.

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  • For what applications is Forth best suited?

    - by namin
    I am intrigued by stack-based languages like Forth. Are there situations where Forth is the best tool for the job or is it just an intellectual and historical curiosity? What about derivative languages like Factor or Joy? Which of these languages would you recommend learning? And for what purpose (apart from mind expansion)?

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  • HttpService Vs Remote Objects

    - by kalyaniRavi
    Hi, I have a flex application and need to show the real time data into the chatrs and datagrids. Eralier we are used Httpservices to showing the real time data and historical data into charts and datagrids. But now we are going to replace the Httpservices to remote objects. So which places generally need to change. I have a little bit idea about remote objects. Thanks, Ravi

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  • VSS Deprecated Files

    - by timothyawiseman
    We are using VSS for version control (changing to another version control system is not an option right now), and are occassionally running into issues where a file has been completely deprecated with its functionality split into other new files. For historical archival reasons we need to keep those files in the version control sytem. Is there some way to clearly mark them as deprecated and no longer used?

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  • Java script Java

    - by Neeraj
    Why Javascript is called Java (there is no relation between Java and Javascript) why its not called HTMLScript or XMLScript. Any historical reason for this?

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  • SQL Query Theory Question...

    - by Keng
    I have a large historical transaction table (15-20 million rows MANY columns) and a table with one row one column. The table with one row contains a date (last processing date) which will be used to pull the data in the trasaction table ('process_date'). Question: Should I inner join the 'process_date' table to the transaction table or the transaction table to the 'process_date' table?

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  • When to delete a branch from Git?

    - by lupefiasco
    I'm relatively new to Git, and want to get advice on best practices for deleting branches. After I've created and merged a branch back into master, should I leave it hanging around for historical purposes, or should I delete it as soon as it's no longer needed for housekeeping purposes?

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  • Pie chart of *nix shell use [closed]

    - by hayk.mart
    I've encountered a situation where it would be very helpful to know the breakdown of shell use by percentage. For example, I'm looking for something like bash: X%, sh: Y%, csh, tcsh, zsh, ksh, dash, etc.. Obviously, I know there are several complications - multiple shells, the definition of "use", uncertainty and so forth, but I would like to see an informed answer derived from actual data and based on some stated metric, even if the result could be horribly wrong. Bonus if there is historical data demonstrating a shift in preferences.

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