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• What approach should be suitable for user authentification in simle client/server app

  - by TerryS

  My previous question was closed so I will be more specific. I need to create an application, desktop one written in C#, that will ask for user credentials and after verification opens the GUI allowing to work with DB (black box for users). It should be used from everywhere, not LAN or SQL domain. I assume I would need to do the following: Create a client and a server applications that will deal with authentification. That would mean a lot of socketing stuff.. Once the user is verified, the client queries would be sent to database (client-server-DB). The server would need to send the DB data sets back to the client. As you can see, this is just my guess but I have no idea whether its too complicated or completely wrong. The main thing is that it must be desktop app (not web based one) and accessible from everywhere. I am interested in main points how to design the system and will be extremely grateful for that.

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• Objective-C: how to splt a string constant across multiple lines

  - by Ilya

  Hi, I have a pretty long sqlite query: const char *sql_query = "SELECT statuses.word_id FROM lang1_words, statuses WHERE statuses.word_id = lang1_words.word_id ORDER BY lang1_words.word ASC"; How can I break it in a number of lines to make it easier to read? If I do the following: const char *sql_query = "SELECT word_id FROM table1, table2 WHERE table2.word_id = table1.word_id ORDER BY table1.word ASC"; I am getting a error. Is there a way to write queries in multiple lines? Thank you.

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• mysql stored routine vs. mysql-alternative?

  - by user522962

  We are using a mysql database w/ about 150,000 records (names) total. Our searches on the 'names' field is done through an autocomplete function in php. We have the table indexed but still feel that the searching is a bit sluggish (a few full seconds vs. something like Google Finance w/ near-instant response). We came up w/ 2 possibilities, but wanted to get more insight: Can we create a bunch (many thousands or more) of stored procedures to speed up searches, or will creating that many stored procedures bog-down the db? Is there a faster alternative to mysql for "select" statements (speed on inserting & updating rows isn't too important so we can sacrifice that, if necessary). I've vaguely heard of BigTable & others that don't support JOIN statements....we need JOIN statements for some of our other queries we do. thx

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• What is the most efficient approach to fetch category tree, products, brands, counts by subcategory

  - by alex227

  Symfony 1.4 + Doctrine 1.2. What is the best way to minimize the number of queries to retrieve products, subcategories of current category, product counts by subcategory and brand for the result set of the query below? Categories are a nested set. Here is my query: $q = Doctrine_Query::create() ->select('c.*, p.product,p.price, b.brand') ->from('Category c') ->leftJoin('c.Product p') ->leftJoin('p.Brand b') ->where ('c.root_id = ?', $this->category->getRootId()) ->andWhere('c.lft >= ?', $this->category->getLft()) ->andWhere('c.rgt <= ?', $this->category->getRgt()) ->setHydrationMode(Doctrine_Core::HYDRATE_ARRAY); $treeObject = Doctrine::getTable('Category')->getTree(); $treeObject->setBaseQuery($q); $this->treeObject = $treeObject; $treeObject->resetBaseQuery(); $this->products = $q->execute();

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• significance of index name in creating an index (mySQL)

  - by Will

  I've done something like this in order to use on duplicate key update: CREATE UNIQUE INDEX blah on mytable(my_col_to_make_an_index); and its worked just fine. I'm just not sure what the purpose of the index name is -- in this case 'blah'. The stuff I've read says to use one but I can't fathom why. It doesn't seem to be used in queries, although I can see it if I export the schema. So ... what purpose does the index name serve? If it helps the line in the CREATE TABLE ends up looking like: UNIQUE KEY `clothID` (`clothID`)

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• WPF databind in memory image to Image control

  - by Ready Cent

  I am using a DataGrid and trying to do the following Databinding <DataTemplate> <Grid> <Image> <Image.Source> <BitmapImage UriSource="{Binding Data.CustomImage}" CacheOption="OnLoad" /> </Image.Source> </Image> </Grid> </DataTemplate> CustomImage is of type BitmapImage. When I run I get the error: Initialization of 'System.Windows.Media.Imaging.BitmapImage' threw an exception. The thing is that these images are stored as resources in a different assembly so I can't just point to a location on disk

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• Getting age in years in a SQL query

  - by Earlz

  Hello I've been tasked with doing a few queries on a large SQL Server 2000 database. The query I'm having trouble with is "find the number of people between ages 20 and 40" How would I do this? My previous query to get a count of everyone looks like this: select count(rid) from people where ... (with the ... being irrelevant conditions). I've googled some but the only thing I've found for calculating age is so large that I don't see how to embed it into a query, or it is a stored procedure which I do not have the permissions to create. Can someone help me with this?

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• Which approach to create the data access layer has the highest performance?

  - by pooyakhamooshi

  I have to create a very high performance application. Currently, I am using Entity Framework for my data access layer. My application has to insert some communication data almost every second. I found that Entity Framework is slow; it has about 2 seconds delay to finish the SaveChanges() method. I was thinking I have the following options: 1. Create the data access layer myself using ADO.NET; using stored procedures or ad-hoc queries 2. Use Enterprise Library Data access Layer 3. Use NHibernate 4. Use Repository Factory: http://pooyakhamooshi.blogspot.com/search?q=repository What do you think? which one is quicker for inserting data? Which one is quicker to set up?

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• Does SELECT COUNT(*) work with MySQLi prepared statements?

  - by wordman

  I'm working on a test page and am using MySQLi prepared statements in my queries after reading they make my code safe from SQL injection. I have been successful with prepared statements so far with retrieving data from my DB, that all works great. What I want to do now is count the number of galleries within a project using SELECT COUNT(*). That's it. Without using a prepared statement, my old query looked like this: // count number of galleries per project $conn = dbConnect('query'); $galNumb = "SELECT COUNT(*) FROM pj_galleries WHERE project = {$pjInfo['pj_id']}"; $gNumb = $conn->query($galNumb); $row = $gNumb->fetch_row(); $galTotal = $row[0]; But for all my reading and searching the internet, I can not find out the proper way to write this as a prepared statement. I'm no PHP whiz here, and not coding daily isn't helping my skills. If I've missed anything please ask. Many thanks!

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• Through Java, make a call to Javascript functions on networked device?

  - by stjowa

  I am doing device monitoring on a networked system. I need to know how to make Javascript calls on that device via its IP address to get certain status information (this device's status is only available through Javascript APIs, not SNMP, etc). I am working in Java. ADDED: The specific device is an Amino set-top-box. It has what it calls JMACX: JavaScript Media Access Control Extensions API specification. It allows you within an HTML document to use that API to get MUCH information about the device (cpu usage, channel info, remote-control options, etc.). I need to get this information within a Java program for specific monitoring purposes. Perhaps possible with HTTP requests? Any input would be greatly appreciated. Thanks, Steve

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• SQL Server GROUP BY troubles!

  - by Lucas311

  I'm getting a frustrating error in one of my SQL Server 2008 queries. It parses fine, but crashes when I try to execute. The error I get is the following: Msg 8120, Level 16, State 1, Line 4 Column 'customertraffic_return.company' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause. SELECT * FROM (SELECT ctr.sp_id AS spid, Substring(ctr.company, 1, 20) AS company, cci.email_address AS tech_email, CASE WHEN rating IS NULL THEN 'unknown' ELSE rating END AS rating FROM customer_contactinfo cci INNER JOIN customertraffic_return ctr ON ctr.sp_id = cci.sp_id WHERE cci.email_address <> '' AND cci.email_address NOT LIKE '%hotmail%' AND cci.email_address IS NOT NULL AND ( region LIKE 'Europe%' OR region LIKE 'Asia%' ) AND SERVICE IN ( '1', '2' ) AND ( rating IN ( 'Premiere', 'Standard', 'unknown' ) OR rating IS NULL ) AND msgcount >= 5000 GROUP BY ctr.sp_id, cci.email_address) AS a WHERE spid NOT IN (SELECT spid FROM customer_exclude) GROUP BY spid, tech_email

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• Entity Framework: Attached Entities not Saving

  - by blog

  Hello: I can't figure out why calling SaveChanges() on the following code results in no changes to the objects I attached: // delete existing user roles before re-attaching if (accountUser.AccountRoles.Count > 0) { foreach (AccountRole role in accountUser.AccountRoles.ToList()) { accountUser.AccountRoles.Remove(role); } } // get roles to add List<int> roleIDs = new List<int>(); foreach (UserRole r in this.AccountRoles) { roleIDs.Add(r.RoleID); } var roleEntities = from roles in db.AccountRoles where roleIDs.Contains(roles.id) select roles; accountUser.AccountRoles.Attach(roleEntities); db.SaveChanges(); In the debugger, I see that the correct roleEntities are being loaded, and that they are valid objects. However, if I use SQL Profiler I see no UPDATE or INSERT queries coming in, and as a result none of my attached objects are being saved.

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• Scheduled cron job to check for pending activity

  - by luckytaxi

  Using PHP ... This is for my personal use so I'm thinking maybe 3-4 emails a day. I'm at a point where I can send an email to a dedicated email address where my script parses the message and stores it into a DB. Now, I need to figure out the best way to check the records in the DB for any upcoming task. I feel like I'm missing something, maybe like a trigger field as to when a reminder should go out. However, that's not a concern to me at the moment since I'll just send an alert 15 mins prior to the due date. Question is, shoudl I run a cron job that queries the DB every minute? I take it the query will have to say something like "select all tasks that is due within 15 minutes."

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• Fusion Table Layer Caching issue

  - by user1854791

  I have created a series of fusion table layers and apply filtering to one of the layers in response to checkbox click events. The base layer of the map contains a gradient applied over county boundaries. When the base layer is unchecked, the filtered layer loses it's styling. I have added unique timestamps to all queries to avoid caching, however I get the feeling that these image tiles are still be cached for this situation. Is there any way to force the google fusion tables api to invalidate a cached image? Test site here: http://map.inquestmarketing.com/new.html Unchecking the Other - Consumer Prospects checkbox reproduces the issue. This is a pure client app, all of the source is in the single page.

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• What can cause reset connection when running PHP script?

  - by marcin_koss

  I've developed a web application with CodeIgniter that works perfectly on my local machines (one with windows and one with Linux). When I moved it to my hosting server, connection gets reset when running one particular PHP script that does a few MySQL queries and some operations on arrays. The data I'm querying is small, just a few tables with up to 25 records. Firefox returns "The connection was reset" after maybe 2-3 seconds. I checked the servers error logs but there was nothing there. Unfortunately I don't have access to Apache error logs. What can cause this behavior?

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• Running script constantly in background: daemon, lock file with crontab, or simply loop?

  - by Mauritz Hansen

  I have a Perl script that queries a database for a list of files to process processes the files and then exits Upon startup this script creates a file (let's say script.lock), and upon exit it removes this file. I have a crontab entry that runs this script every minute. If the lockfile exists then the script exits, assuming that another instance of itself is running. The above process works fine but I am not very happy with the robustness of this approach. Specifically, if for some reason the script exits prematurely and the lockfile is not removed then a new instance will not execute properly. I would appreciate some advice on the following: Is using the lock file a good approach or is there a better/more robust way to do this? Is using crontab for this a good idea or could I better write an endless loop with sleep()? Should I use the GNU 'daemon' program or the Perl Proc::Daemon module (or some other equivalent) for this?

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• Offline database access

  - by dtech

  I have a small application which basically consists of an user-friendly CRUD interface to a few tables (and joined tables) It currently works with a MySQL database but I would like to make it available offline. My first thought was to create a SQLite "buffer" in between the MySQL database and the application, e.g. by executing all queries on the SQLite but also storing them in a log table so that they can be executed later in the main database with very basic conflict resolution (I will basically let the user solve it if a conflict is detected) Due to the simplicity of the application this shouldn't be too difficult and good exercise, but I think I would be re-inventing the wheel. So my question is: are there existing solutions or other approaches for this problem?

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• how can resize the page?

  - by Ryliatron

  im designing a website and i have screen resolution problem. I want to scale my page but i cant do it. Its my website and 21.5 inc mac screen: (its done, no problem) Its my laptop screen 1366 x 768 px resolution; I tryed this on css; body, html {height:100%;} and this on html; <meta name="viewport" content="width=device-width, height=device-height, initial-scale=1, maximum-scale=1"> <link rel="stylesheet" href="css/style.css" type="text/css" media="all" /> Doctype is: XHTML 1.0 Transitional but doesnt work. How can i do it? Thanks!

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• it is possible to "group by" without losing the original rows?

  - by toPeerOrNotToPeer

  i have a query like this: ID | name | commentsCount 1 | mysql for dummies | 33 2 | mysql beginners guide | 22 SELECT ..., commentsCount // will return 33 for first row, 22 for second one FROM mycontents WHERE name LIKE "%mysql%" also i want to know the total of comments, of all rows: SELECT ..., SUM(commentsCount) AS commentsCountAggregate // should return 55 FROM mycontents WHERE name LIKE "%mysql%" but this one obviously returns a single row with the total. now i want to merge these two queries in one single only, because my actual query is very heavy to execute (it uses boolean full text search, substring offset search, and sadly lot more), then i don't want to execute it twice is there a way to get the total of comments without making the SELECT twice? !! custom functions are welcome !! also variable usage is welcome, i never used them...

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• Changing href atribute

  - by ferrucio

  In need to change a part of this href: <a href="media/xxxxx-yyy.jpg">large pic</a> I have some designs, and some colors, xxxxx stands for designnumber and yyy for colornumber, when one of the designs is clicked or one of the colors the href should change according to the value: <a href="#">design1</a> <a href="#">design2</a> <a href="#">design3</a> <a href="#">color1</a> <a href="#">color2</a> <a href="#">color3</a> Is there any way to do this with JQuery?

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• Is it OK to run an array with 22k strings in a PHP code on a shared web host?

  - by kuchikoo

  I'm new to writing code so kindly bear with me if this is a very noobish question. A couple of days back I asked a question about a PHP code that matches the the query entered by users on my website to an array stored within the PHP code and displays the matched queries. Here is the code I'm talking about Now I've ended up with a rather large list (over 22k) of strings that have to be stored in the array. Is it ok to run it like this? I'm hosting the site on a shared hostgator package, will this cause my site to crash? I don't know too much about DBs but can I somehow store this on MySQL instead of having it in the code?

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• How can an SQL query return data from multiple tables

  - by Fluffeh

  I would like to know how to get data from multiple tables in my database, what types of methods are there to do this, what are joins and unions and how are they different from one another? When should I use each one compared to the others? I am planning to use this in my (for example - PHP) application, but don't want to run multiple queries against the database, what options do I have to get data from multiple tables in a single query? Note: I am writing this as I would like to be able to link to a well written guide on the numerous questions that I constantly come across in the PHP queue, so I can link to this for further detail when I post an answer. The answers cover off the following: Part 1 - Joins and Unions Part 2 - Subqueries Part 3 - Tricks and Efficient Code

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• Keeping some files private

  - by user490895

  Hi, I was trying to create a directory of private files that could only be accessed when a user logs in. To do this, I used a folder outside the web directory, and then php to access it, if allowed. Here's an example: function display_movie($file){ printf("<video id='movie' width='960' height='416' controls='controls' onerror='fix()'> <source src='movie.php?file=%s' type='video/ogg; codecs=\"theora, vorbis\"'> </video>", rawurlencode($file)); } This works great for images, but breaks the media player. Also, I've only tested this locally on a Linux machine. Any ideas? Thanks.

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• Entity Framework with SQL Server 2000 (APPLY Operator) issue

  - by How Lun

  Hello, I have a simple Linq query below: var seq = (from n in GetObjects() select n.SomeKey) .Distinct() .Count(); This query works find with SQL Server 2005 and above. But, this start to give headache when I hooked the EF to SQL Server 2000. Because EF is using APPLY operator which only SQL Server 2005 and above can be supported. I do not know why the hell EF is using APPLy operator instead of sub queries. My current work around is: var seq = (from n in GetObjects() select n.SomeKey) .Distinct() .ToList() .Count(); But, I can forsee more problems to come. The above query is just a simple one. Did anyone come across such issue? And how you guys work around it? Or is there a way to force EF not to use APPLY operator? Any help will be very much appreciated. How Lun.

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• Storing database records into array

  - by zerey

  I would want to create an array that will hold records retrieved from a database using a query of SELECT statement. The records to be retrieved have multiple fields such as lastname, firstname, mi and 20 more fields. What would be the best approach on coding this function? alright i have followed what prisoner have given below.. the next question is how do i search through this kind of array using queries? for example i want to search for a username..

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