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  • Database design 1 to 1 relationship

    - by Khou
    I design my database incorrectly, should I fix this while its in development? "user" table is suppose to have a 1.1 relationship with "userprofile" table however the actual design the "user" table has a 1.* relationship with "userprofile" table. Everything works! but should it be fixed anyways?

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  • java database backup and restore

    - by jawath
    How do I backup / restore any kind of databases inside my java application to flate files.Are there any tools framework available to backup database to flat file like CSV, XML, or secure encrypted file, or restore from csv or xml files to databases, it should be also capable of dumping table vise restore and backup also.

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  • WPF Application with Database.

    - by mike
    Hi, i would like to or need to use a database for my wpf project. It has to store "person" "team" "goals" and maybe 2 more things, nothing very big. Ive already used (worked) with databases in java / php (postgresql), but is there maybe an "easier" way to store the things.. i mean if the db is going to be big than i could use (postgre or mysql), but this one would be small.

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  • Database with great read performance

    - by mscava
    I have 10 tables from which 4 contain each up to million rows. All values are inserted at once, and afterwards I only read the data many times. I am searching for a database that would perform greatly when it comes to selecting, joining or other reading etc. What is the most recommended option?

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  • Good resource for studying Database High Availability techniques

    - by Invincible
    Hello Can anybody suggest some good resource/book on Database high availability techniques? Moreover, High-availability of system software like Intrusion Prevention system or Web servers. I am considering high-availability is global term which covers clustring, cloud computing, replication, replica management, distributed synchronization for cluster. Thanks in advance!

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  • Is it possible to download a large database using mysql query

    - by Rose
    i am downloading files from server using WinSCP.Is it possible to write a query to download a large database using mysql query? Or using any other method i have tried with this code but i am not able to get the whole database structure <?php if(file_exists('backup_sql/my_backup.zip')) { unlink('backup_sql/my_backup.zip'); } $tables='*'; $host='MY HOST NAME'; $user='MY_USERNAME'; $pass='MYPASSWORD'; $name='MY_DB_NAME'; $link = mysql_connect($host,$user,$pass); mysql_select_db($name,$link); //get all of the tables if($tables == '*') { $tables = array(); $result = mysql_query('SHOW TABLES'); while($row = mysql_fetch_row($result)) { $tables[] = $row[0]; } } else { $tables = is_array($tables) ? $tables : explode(',',$tables); } $return=''; //cycle through foreach($tables as $table) { $result = mysql_query('SELECT * FROM '.$table); $num_fields = mysql_num_fields($result); //$return.= 'DROP TABLE '.$table.';'; $row2 = mysql_fetch_row(mysql_query('SHOW CREATE TABLE '.$table)); $return.= "\n\n".$row2[1].";\n\n"; for ($i = 0; $i < $num_fields; $i++) { while($row = mysql_fetch_row($result)) { $return.= 'INSERT INTO '.$table.' VALUES('; for($j=0; $j<$num_fields; $j++) { $row[$j] = addslashes($row[$j]); //$row[$j] = ereg_replace("\n","\\n",$row[$j]); if (isset($row[$j])) { $return.= '"'.$row[$j].'"' ; } else { $return.= '""'; } if ($j<($num_fields-1)) { $return.= ','; } } $return.= ");\n"; } } $return.="\n\n\n"; } $rand_var=time(); $files_to_zip = array( "'backup_sql/db-backup-'.$rand_var.'.sql'", ); $name = 'db-backup-'.$rand_var.'.sql'; $data = $return; ?> any one please help me... thank you

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  • Database Design Question

    - by Soo
    Ok SO, I have a user table and want to define groups of users together. The best solution I have for this is to create three database tables as follows: UserTable user_id user_name UserGroupLink group_id member_id GroupInfo group_id group_name This method keeps the member and group information separate. This is just my way of thinking. Is there a better way to do this? Also, what is a good naming convention for tables that link two other tables?

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  • Deleting file with SharePoint List web service fails

    - by Robert MacLean
    I am trying to delete a file from SharePoint using the list web service which is failing with the following error. Error Code: 0x81020030 Message: Invalid file name Detail: The file name you specified could not be used. It may be the name of an existing file or directory, or you may not have permission to access the file. The update XML I sent through is: <Batch OnError="Continue" PreCalc="TRUE" ListVersion="0" ViewName="{8FE4E2C8-939E-4462-ABA2-D633EED7F76E}"><Method ID="1" Cmd="Delete"><Field Name="ID">84</Field><Field Name="FileRef">http://win-4h0xp59sn75:40414/Shared%20Documents/del.txt</Field></Method></Batch> The SharePoint server error logs indicate: ERROR: Failed to OpenThreadToken, LastError=1008 The file you are attempting to save or retrieve has been blocked from this Web site by the server administrators. Things I have tried I've tried the changes in #1372971 which has no helped. I have also tried the changes recommended on the Microsoft Social site, which has also not helped. I have confirmed that the txt file extension is not blocked as indicated here. In addition I can remove the file via the website, it is just on the web service that this fails. The permissions are correct (or rather not in play) as I am running as a SharePoint administrator, which is the same account that uploaded it via the copy web service.

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  • Web-based clients vs thick/rich clients?

    - by rudolfv
    My company is a software solutions provider to a major telecommunications company. The environment is currently IBM WebSphere-based with front-end IBM Portal servers talking to a cluster of back-end WebSphere Application Servers providing EJB services. Some of the portlets use our own home-grown MVC-pattern and some are written in JSF. Recently we did a proof-of-concept rich/thick-client application that communicates directly with the EJB's on the back-end servers. It was written in NetBeans Platform and uses the WebSphere application client library to establish communication with the EJB's. The really painful bit was getting the client to use secure JAAS/SSL communications. But, after that was resolved, we've found that the rich client has a number of advantages over the web-based portal client applications we've become accustomed to: Enormous performance advantage (CORBA vs. HTTP, cut out the Portal Server middle man) Development is simplified and faster due to use of NetBeans' visual designer and Swing's generally robust architecture The debug cycle is shortened by not having to deploy your client application to a test server No mishmash of technologies as with web-based development (Struts, JSF, JQuery, HTML, JSTL etc., etc.) After enduring the pain of web-based development (even JSF) for a while now, I've come to the following conclusion: Rich clients aren't right for every situation, but when you're developing an in-house intranet-based solution, then you'd be crazy not to consider NetBeans Platform or Eclipse RCP. Any comments/experiences with rich clients vs. web clients?

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  • General Web Programming/designing Question: ?

    - by Prasad
    hi, I have been in web programming for 2 years (Self taught - a biology researcher by profession). I designed a small wiki with needed functionalities and a scientific RTE - ofcourse lot is expected. I used mootools framework and AJAX extensively. I was always curious when ever I saw the query strings passed from URL. Long encrypted query string directly getting passed to the server. Especially Google's design is such. I think this is the start of providing a Web Service to a client - I guess. Now, my question is : is this a special, highly professional, efficient / advanced web design technique to communicate queries via the URL ? I always felt that direct URL based communication is faster. I tried my bit and could send a query through the URL directly. here is the link: http://sgwiki.sdsc.edu/getSGMPage.php?8 By this , the client can directly link to the desired page instead of searching and / or can automate. There are many possibilities. The next request: Can I be pointed to such technique of web programming? oops: I am sorry, If I have not been able to convey my request clearly. Prasad.

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  • Web scraping etiquette

    - by Ash
    I'm considering writing a simple web scraping application to extract information from a website that does not seem to specifically prohibit this. I've checked for other alternatives (eg RSS, web service) to get this information, but there are none available at this stage. Despite this I've also developed/maintained a few websites myself and so I realize that if web scraping is done naively/greedily it can slow things down for other users and generally become a nuisance. So, what etiquette is involved in terms of: Number of requests per second/minute/hour. HTTP User Agent content. HTTP Referer content. HTTP Cache settings. Buffer size for larger files/resources. Legalities and licensing issues. Good tools or design approaches to use. Robots.txt, is this relevant for web scraping or just crawlers/spiders? Compression such as GZip in requests. Update Found this relevant question on Meta: Etiquette of Screen Scaping StackOverflow. Jeff Atwood's answer has some helpful recommendations. Other related StackOverflow questions: Options for html scraping Legalities of screen scraping

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  • jsf and huge web site

    - by darko petreski
    Hi All, I need to program a very huge web site. The site should contain public part with search engine, user registration forms, cart and all other stuff. The private part should contain administrative web application with a lot of data grids, complex edit forms, security checks, services and so on. Also I need very good support for html mailing and pdf exports. Web services are also required. I am considering to use jsf. Can you recommend me books or other stuff where I can find all this info for building what i need? Is seam good option for this? I have looked their site and page seam on production. The sites listed there are far from professional and enterprise. Is there any book that explains how to build complete web site with jsf technology from login, security, sending mails, pdf conversion, time dependent background processes and everything else that big sites needs. I do not have time reading 20 books. In every php book all this stuff is explained but I have not seen a single java book that at least from high view will explain all of this. Regards

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  • Using DPAPI / ProtectedData in a web farm environment with the User Store

    - by Lachman
    I was wondering if anyone had successfully used DPAPI with a user store in a web farm enviroment? Because our application is a recently converted from 1.1 to 2.0 asp.net app, we're using a custom wrapper which directly calls the CryptUnprotect methods. But this should be the same as the ProtectedData method available in the 2.0 framework. Because we are operating in a web farm environment, we can't guarantee that the machine that did the encryption is going to be the one decrypting it. (Also because machine failures shouldn't destroy our encrypted data). So what we have is a serviced component that runs in a service under a particular user account on each one of our web boxes. This user is a set up to have a roaming profile, as per the recomendation. The problem we have is that info encrypted on one machine can not be decrypted on another, this fails with the win32 error 'Key not valid for use in specified state'. I suspect that this is because I've made a mistake by having the encryption service running as the user on multiple machines, hence keeping the user logged in on more than one machine at the same time. If this is the problem, how are other using DPAPI with the User Store in a web farm environment?

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  • Steps in creating a web service using Axis2 - The client code

    - by zengr
    I am trying to create a web service, my tools of trade are: ** Axis2, Eclipse, Tomcat, Ant ** I need to create a web service from Code, i.e. Write a basic java class which will have the methods to be declared in the WSDL. Then use java2WSDL.sh to create my WSDL. So, is this approach correct: Write my Java class with actual business logic package packageNamel; public class Hello{ public void World(String name) { SOP("Hello" + name); } } Now, when I pass this Hello.java to java2WSDL.sh, this will give me the WSDL. Finally, I will write the services.xml file, and create the Hello.aar with following dir structure: Hello.aar packageName Hello.class META-INF services.xml MANIFEST.MF Hello.WSDL Now, I assume, my service will be deployed when I put the aar in tomcat1/webapps/axis2/WEB-INF/services But, here comes my problem, HOW DO I ACCESS THE METHOD World(String name)???!!, i.e. I am clueless about the client code! Please enlighten me on making a very basic web service and calling the method. The above described 3 steps might be wrong. It's a community wiki, feel free to edit. Thanks

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  • WCF Service instead of ASMX Web Service?

    - by wchrisjohnson
    I'm writing a SOAP Server that will act as an endpoint for an external client. The external client expects SOAP 1.1. I'll be taking embedded business objects in the SOAP messages and passing them to an internal application, getting responses back and responding with SOAP messages to the eternal client. I did the traditional ASMX based web services several years ago. Now, I've been exploring WCF Services and wondering the best approach to take. 1) Should WCF be considered a superset of ASMX web services? 2) Is there any reason to still write new web services using ASMX instead of WCF? 3) Does WCF provide better facilities for working with SOAP messages, as opposed to SOAP Extensions? 4) Can I restrict communication to SOAP 1.1 using WCF, the way I can with a web.config change in ASMX? 5) Does WCF have an easy way to log or review the requests that hit the service without resorting to something like SOAP extensions? Sorry my questions are not very specific; still trying to get handle on what I need to know... Using VS2008, Windows Server 2008. Chris

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  • Interactive Web Collaboration Platform

    - by user1477586
    I am currently unsatisfied with most, if not all, web-based collaboration tools I've ever used. Examples of what I'm considering a "web-based collaboration tool" are TWiki, WebEx, etc. What I have in mind of developing is to develop my own. The target "market" is for software/hardware developers who will likely be working on separate projects linked by a common goal. Example: You work at a company who is designing a brand new printer. So, one man is working on the ink cartridge, another on the paper feed, one on the circuitry of the printer and one more is working on the drivers. What I would like to make (unless it already exists) is a website that, upon loading, presents the user with a web that has each project within it's own bubble, graphically. These bubbles would all be linked to the central bubble of "[Company Name]". Upon selecting an individual bubble the browser would focus and zoom in on that project bubble and expand more information (in bullets or with more affiliated bubbles) about subprojects, progress, setbacks, etc. Then, at a terminal "node" (i.e. a bubble with no sub-bubbles) a selection would then load a page with information relevant to that node. That's a lot of monologue. In short, I want to know how I might approach this. My background is with algorithmic use of Python and C++. I've never done interactive web design like this; though, I have gone through the W3C tutorials on HTML4/5. I'm willing to learn a new language I'm just wondering which language/set of languages seem(s) most appropriate for this project. Thanks, world, for imparting your knowledge to me. An example of what the start page might look like is:

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  • What should every developer know about databases?

    - by Aaronaught
    Whether we like it or not, many if not most of us developers either regularly work with databases or may have to work with one someday. And considering the amount of misuse and abuse in the wild, and the volume of database-related questions that come up every day, it's fair to say that there are certain concepts that developers should know - even if they don't design or work with databases today. So: What are the important concepts that developers and other software professionals ought to know about databases? Guidelines for Responses: Keep your list short. One concept per answer is best. Be specific. "Data modelling" may be an important skill, but what does that mean precisely? Explain your rationale. Why is your concept important? Don't just say "use indexes." Don't fall into "best practices." Convince your audience to go learn more. Upvote answers you agree with. Read other people's answers first. One high-ranked answer is a more effective statement than two low-ranked ones. If you have more to add, either add a comment or reference the original. Don't downvote something just because it doesn't apply to you personally. We all work in different domains. The objective here is to provide direction for database novices to gain a well-founded, well-rounded understanding of database design and database-driven development, not to compete for the title of most-important.

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  • import problem with twisted.web server

    - by Carson Myers
    I'm just getting started with twisted.web, and I'm having trouble importing a Python module into a .rpy script. in C:\py\twisted\mysite.py, I have this: from twisted.web.resource import Resource from twisted.web import server class MySite(Resource): def render_GET(self, request): request.write("<!DOCTYPE html>") request.write("<html><head>") request.write("<title>Twisted Driven Site</title>") request.write("</head><body>") request.write("<h1>Twisted Driven Website</h1>") request.write("<p>Prepath: <pre>{0}</pre></p>".format(request.prepath)) request.write("</body></html>") request.finish() return server.NOT_DONE_YET and in C:\py\twisted\index.rpy, I have this: import mysite reload(mysite) resource = mysite.MySite() I ran twistd -n web --port 8888 --path C:\py\twisted in command prompt and the server started successfully. But when I requested localhost:8888 I got a (huge) stack trace originating from an ImportError: <type 'exceptions.ImportError'>: No module named mysite I can import the module from the interpreter, and if i just execute index.rpy as a python script, I don't get the import error. The documentation on this subject is a bit vague, it just says "However, it is often a better idea to define Resource subclasses in Python modules. In order for changes in modules to be visible, you must either restart the Python process, or reload the module:" (from here). Does anyone know the proper way to do this?

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  • Dependency injection with web services?

    - by John K.
    I've recently discovered a possible candidate for dependency injection in a .Net application I've designed. Due to a recent organizational policy, it is no longer possible to call smtp mail services from client machines on our network. So I'm going to have to refactor all the code in my application where it was previously calling the smtp object to send out mail. I created a new WCF web service on an authorized web server that does allow for smtp mail messaging. This seems to be a great candidate for dependency injection. I will create a new INotification interface that will have a method like 'void SendNotification(MailMessage msg)' and create a new property in my application where you can set this property to any class that implements this interface. My question tho, is whether it's possible, through dependency injection, to encapsulate the instantiation of a .NET WCF web service? I am fairly new at IoC and Dependency injection frameworks, so I am not quite sure if it can handle web service dependencies? I'm hoping someone else out there has come across this situation or has knowledge regarding this subject? cheers, John

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  • Advice on a DB that can be uploaded to a website by a smart client for collecting survey feedback

    - by absfabs
    Hello, I'm hoping you can help. I'm looking for a zero config multi-user datbase that my winforms application can easily upload to a webserver folder (together with 1 or 2 classic asp pages) and am looking for some suggestions/recommendations. The idea is that the database will be used to collect feedback entered by people filling in the asp pages. The pages will write to the database using javascript. The database will subsequently be downloaded again for processing once the responses are in. In Summary: It will mostly run in MS Windows environments. I have a modest budget for this and do not mind paying for such a database. No runtime licensing costs. Should be xcopy - Once uploaded to a website folder it should be operational. It should not have a dotnet CLR dependency. It should support a resonable level of concurrent access. Average respondent count would be around 20-30 but one never knows. Should be a reasonable size so that uploads/downloads to and from the site will be reasonably fast. Would appreciate your suggestions/comments Many thanks Abz To clarify - this is a desktop commercial application for feedback management in a vertical market. It uses SQL Server as the backing store. The application currently provides feedback management from email and paper feedback. I now want to add web feedback capability. Getting users to to make their SQL servers accessible to a website is not at option at this time as I am want to make getting up and running as painless as possible. I intend to release a web based implementation of the software in the near future but for now am looking at the above as a pragmatic way to provide web based feedback collection.

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