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  • Setting up a web developer lab for learning purposes

    - by Saleh Al-Abbas
    I'm not a developer by profession. Therefore, I'm not exposed to real world technical problems that face professional developers. I read/heard about web farms, integration between different systems, load balancing ... etc. Therefore, I was wondering if there are ways for the individual developer to create an environment that simulates real world situations with minimal number of machines like: web farms & caching simulating many users accessing your website (Pressure tests?) Performance load balancing anything you think I should consider. By the way, I have a server machine and 1 PC. and I don't mind investing in tools and software. PS. I'm using Microsoft technologies for development but I hope this is not a limiting factor. Thanks

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  • Can a binary tree or tree be always represented in a Database as 1 table and self-referencing?

    - by Jian Lin
    I didn't feel this rule before, but it seems that a binary tree or any tree (each node can have many children but children cannot point back to any parent), then this data structure can be represented as 1 table in a database, with each row having an ID for itself and a parentID that points back to the parent node. That is in fact the classical Employee - Manager diagram: one boss can have many people under him... and each person can have n people under him, etc. This is a tree structure and is represented in database books as a common example as a single table Employee.

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  • mySQL database password change now crashes Joomla.

    - by casim
    I have a mySQL database behind a Joomla install. I changed the database password because I forgot it but now Joomla crashes looking for the database. I guess joomla has the password written somewhere - if anyone knows I might be able to manual edit it and enter the new database password. Otherwise I'm hoping a manual install of a backup of the original database will work. I need to know does a backup include the database password. If yes, will reinstating my original database solve the problem for me by reverting the system back to it's original password? Please help. thx, s.

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  • Can I start my new Career as a web application developer over an age of 32

    - by Sami
    Greetings Guys.. Iam 32 years old, I graduated from university in 2005 but from that time I didnt work in my career as a developer,and I dont have any experience in that major. My current career is software testing, but actually iam not satisfied in that job since i dont see any future for it and i dont know its path (to where will I arrive). Now i decided to take extra cources in VB.net, asp.net since I want to change my career to become webdeveloper. But 1 thing that always desturb me is that I feel that time is passed iam iam too old to become web developer. Is my feeling true?? and are there any poeple who start programing at a late age and did the succeed?? Thanks

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  • How and Where do I learn about how to hook up my uncreated Database to a 3rd party API

    - by raln
    I want to create a database with information that I can send to a third party... they give their api on their website but they don't break it down for new / newbs like myself... I'm confused and was thinking of getting a developer to do this all for me but I DON'T want to get ripped off... and overpay All it is is a webapplication backed by a database onto their platform where they support different API's but I also need a function in my web app that can send various messages via XML, or SMPP to their webservice.. . hmm -Ken

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  • ADO.NET: Faster way to check if the database server is accessible?

    - by lotana
    At the moment I am using this code to check if the database is accessible: public bool IsDatabaseOnline(string con) { bool isConnected = false; SQLConnection connect = null; try { connect = new SQLConnection(con); connect.Open(); isConnected = true; } catch (Exception e) { isConnected = false; } finally { if (connect != null) connect.Close(); } return isConnected; } While this code works fine, there is a disadvantage. If the server is not online it spends about 4 full seconds trying to open the connection before deciding that it is not available. Is there a way to test the connection without trying to actually opening it and waiting for the timeout? Something like a database-equivalent of ping?

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  • How to select the nth row in a SQL database table?

    - by Charles Roper
    I'm interested in learning some (ideally) database agnostic ways of selecting the nth row from a database table. It would also be interesting to see how this can be achieved using the native functionality of the following databases: SQL Server MySQL PostgreSQL SQLite Oracle I am currently doing something like the following in SQL Server 2005, but I'd be interested in seeing other's more agnostic approaches: WITH Ordered AS ( SELECT ROW_NUMBER() OVER (ORDER BY OrderID) AS RowNumber, OrderID, OrderDate FROM Orders) SELECT * FROM Ordered WHERE RowNumber = 1000000 Credit for the above SQL: Firoz Ansari's Weblog Update: See Troels Arvin's answer regarding the SQL standard. Troels, have you got any links we can cite?

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  • SQL Error (1064) when importing data from SQL file

    - by mejpark
    I have a MySQL database, which was originally set up with the default latin1 character set and latin1_swedish_ci collation. I was using the database like this for sometime, until I noticed strange characters on my production web site, which is powered by a database exported from my development machine. At this point, I changed the default character set of the database and tables to utf8 and the collation to utf8_unicode_ci, converted the latin1 data inside each table to utf8 (using the 'convert data' option) and exported the database as a single SQL file using HeidiSQL. When the resulting SQL file is opened in Notepad++, several characters are rendered incorrectly. For example, en dashes (-) are displayed as – and e with accent (é) are displayed as é. I changed the encoding of the file from ANSI to UTF-8 (using the encoding menu option in Notepad++) and the offending characters are rendered correctly. I saved the new utf8-encoded SQL file and attempted to import the contents into the MySQL database on my production server. The import process fails with following error: /* SQL Error (1064): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '?# -------------------------------------------------------- # Host: ' at line 1 */ /* Error with snippets directory: The specified path was not found */ The head of the SQL file: # -------------------------------------------------------- # Host: 127.0.0.1 # Server version: 5.1.33-community # Server OS: Win32 # HeidiSQL version: 6.0.0.3773 # Date/time: 2011-04-20 09:48:36 # -------------------------------------------------------- It chokes on the first line of the file, which is commented out. Why is this happening? I didn't have a problem loading data from SQL files until I changed the character set and collation of the database. I came up with an ugly workaround to this problem by performing following steps: Export database as single SQL file using HeidiSQL Open resulting file in Notepad++ and convert from ANSI to UTF-8 encoding Create new empty file in Notepad++, paste in UTF-8 and save file normally What am I missing here?

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  • How to schedule a cron job to backup a MySql database every week?

    - by KevinM
    What is a command line I can use to back up a MySql database every single week into a file name with the date (so that it doesn't collide with previous backups)? Also, is this a reasonable backup strategy? My database is relatively small (a complete export is only 3.2 megs right now). The churn rate is relatively low. I need to be able to get the complete DB back if something goes wrong. And it would be extra cool if there's a way that I could see the changes that occur across a time span.

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  • PHP - How to insert special characters into a database?

    - by Dodi300
    Hello. Can anyone tell me how to insert special characters into a MySQL database? I've made a PHP script which is meant to insert some words into a database, although if the word contains a ' then it wont be inserted. I can insert the special characters fine when using PHPmyAdmin, but it just doesn't work when inserting them via PHP. Could it be that PHP is changing the special characters into something else? If so, is there a way to make them insert properly? Thanks!

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  • Jquery Retrieving data from webpage and entering it in database.

    - by user279321
    Hello Everyone. I am new to Jquery. I want to read specific data(some div's only) from a webpage and store it in my database. Now I am not able to do so as load functions loads the data into the current page id. My goal is to read specific data and store them in database. So which Jquery function should I use for this? if someone can throw some light on it, it would be really helpful for me. I am using JSP,MySQL,Java.

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  • Web Service appears as website instead of developer web server

    - by stocherilac
    I recently reimaged my PC and regrabbed one of our projects from Source Safe. In our solution we have a web service that normally runs on a server, however we can build the webservice on our localhost for debugging as well. However, now whenever I grab the project from source safe it is building the webservice as a website instead of a developer web server. This is causing a variety of issue, specifically I am no longer able to specify which port I would like that webservice to use. As a result I cannot connect to our database through my local webservice. How can I change the project in my solution that controls the webservice from a website to a developer web server? MS Visual Studio 2005. MS Visual Source Safe 2005. MS SQL Server 2000. VB .NET project

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  • Are there any PHP Frameworks (e.g. CodeIgniter) that support database connections on a per user acco

    - by Brad G
    I'm looking into developing a multi-tenant SaaS application, and I found several sites that describe a solid way to separate the data using tenantIDs and updateable views. e.g. This blog post It all hinges on the ability to have your user accounts authenticated from a master users table and then having their respective database connections use those user-specific credentials. This way, the views can pull the userid and map it to the tenantID to display that user's view. However, most PHP frameworks tend to be very static when it comes to database connections (stored in text config files). They appear to be at odds. Does anyone know: a) how to make CodeIgniter handle this gracefully? b) a different PHP framework that might?

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  • Can a binary tree or tree be always represented in a Database table as 1 table and self-referencing?

    - by Jian Lin
    I didn't feel this rule before, but it seems that a binary tree or any tree (each node can have many children but children cannot point back to any parent), then this data structure can be represented as 1 table in a database, with each row having an ID for itself and a parentID that points back to the parent node. That is in fact the classical Employee - Manager diagram: one boss can have many people under him... and each person under him can have n people under him, etc. This is a tree structure and is represented in database books as a common example as a single table Employee.

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  • How do I delete all tables in a database using SqlCommand?

    - by mafutrct
    Unlike the other posts about the task "delete all tables", this question is specifically about using SqlCommand to access the database. A coworker is facing the problem that no matter how it attempts it, he can't delete all tables from a database via SqlCommand. He states that he can't perform such action as long as there is an active connection - the connection by the SqlCommand itself. I believe this should be possible and easy, but I don't have much of a clue about databases so I came here to ask. It would be awesome if you could provide a short code example in C# (or any .NET language, for that matter). If you require additional information, just leave a comment.

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  • PropelBundle database:create for postgres

    - by Karol85
    I've installed propel bundle for symfony2. my database configuration is: propel: dbal: driver: pgsql user: postgres password: postgres dsn: pgsql:host=localhost;port=5432;dbname=test_database options: {} attributes: {} When i wan to create this database from console (console propel: database:create) i have got strange error : Unable to open PDO connection [wrapped: SQLSTATE[08006] [7] FATAL: database "pgsql" does not exist. i created pgsql database on my localhost and everything was good. Database "test_database" was succesfull created. Can somebody explain me why i got this previous error? On mysql i've created database without any problems.

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  • How do you manage your sqlserver database projects for new builds and migrations?

    - by Rory
    How do you manage your sql server database build/deploy/migrate for visual studio projects? We have a product that includes a reasonable database part (~100 tables, ~500 procs/functions/views), so we need to be able to deploy new databases of the current version as well as upgrade older databases up to the current version. Currently we maintain separate scripts for creation of new databases and migration between versions. Clearly not ideal, but how is anyone else dealing with this? This is complicated for us by having many customers who each have their own db instance, rather than say just having dev/test/live instances on our own web servers, but the processes around managing dev/test/live for others must be similar.

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  • Branch for each developer in GIT repo

    - by Peter
    I'd like to move my project to GitHub from local svn repository. Multiple developers are curently working on this project. I was thinking that each developer should have their own branch in which they would commit changes. When manager review their work, he will merge it into master branch. I don't want separate repository for each developer as GitHub has limited number of private repositories. Is this a good idea? What are other alternatives?

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  • Architecture of a secure application that encrypts data in the database.

    - by Przemyslaw Rózycki
    I need to design an application that protects some data in a database against root attack. It means, that even if the aggressor takes control over the machine where data is stored or machine with the application server, he can't read some business critical data from the database. This is a customer's requirement. I'm going to encrypt data with some assymetric algorithm and I need some good ideas, where to store private keys, so that data is secure as well as the application usability was quite comfortable? We can assume, for simplicity, that only one key pair is used.

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  • How to connect to a legacy Informix database?

    - by ivo
    I have to connect my app to a customer's Informix 7.2 legacy database. From what I was able to find out, in theory there should be a database service running on port 50000. The problem is that I cannot find any database service in the Operative System. So far I'm only able to use dbaccess and perform queries from the command line. I would like to use a database driver (such as http://code.google.com/p/ibm-db/) so my app can connect and query the database using a cursor, but since I cannot find any database service, apparently I can't... Am I missing something here? Are there options I'm not considering? Is it possible to have an Informix database in which the only interface is dbaccess?

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  • Does the Quick Search Box search the database in Android? how?

    - by Praveen Chandrasekaran
    i have an database with the values of latitude and longitude. i would need to search those values depends on the user input. does the quick search box can search only the database value with the type-to-search feature. Else i want to put a separate EditText and then do the the search process.. if QSB is possible then how to do that? i want to search and drop a pin on the map.. please make a note of it. Any Idea, tutorial and sample codes are most thankful?

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