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• Graph databases and Php

  - by stagas

  I want to use a graph database using php. Can you point out some resources on where to get started? Is there any example code / tutorial out there? Or are there any other methods of storing data that relate to each other in totally random/abstract situations? Very abstract example of the relations needed: John relates to Mary, both relate to School, John is Tall, Mary is Short, John has Blue Eyes, Mary has Green Eyes, query I want is which people are related to 'Short people that have Green Eyes and go to School' - answer John It is possible in MySQL but it would require a fixed set of attributes/columns for each item and a complex non-flexible query, instead I need every attribute to be an item by itself and instead of 'belonging' to something, to be 'related' to something.

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• How to display multiple cell entries individually from a MySQL database and using PHP

  - by Jake

  I have a column called post_tags where there is sometimes one tag entry and sometimes multiple tags stored. These are separated by * symbols. I want to display these out to the screen one by one. If there were just one item inside the cell I would have used: $query = mysql_query("SELECT post_tags FROM posts WHERE id=$id"); while ($result = mysql_fetch_assoc($query)) { $result['post_tags']; } But how can I display each entry individually when there are multiple ones in one cell (is this what the explode function is for)?

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• Simple select not working on JDBC MSSQL ?

  - by Xinus

  I am trying to move project which was using MySQL database to the one that uses MSSQL 2008, But the select that was working in mysql is no longer working in MSSQL PreparedStatement statement = connection .prepareStatement("select u.user_firstname,u.user_lastname from user_details u, login l where l.username=? and l.login_user = u.user_id"); statement.setString(1, userName); ResultSet resultSet = (ResultSet) statement.executeQuery(); It always gives me empty resultset even when there are values corresponding to that username, When I run query using MSSQL management studio - query works properly i.e. it gives non-zero rows, Are there any MSSQL specific change I need to do ?

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• How do You Get a Specific Value From a System.Data.DataTable Object?

  - by Giffyguy

  I'm a low-level algorithm programmer, and databases are not really my thing - so this'll be a n00b question if ever there was one. I'm running a simple SELECT query through our development team's DAO. The DAO returns a System.Data.DataTable object containing the results of the query. This is all working fine so far. The problem I have run into now: I need to pull a value out of one of the fields of the first row in the resulting DataTable - and I have no idea where to even start. Microsoft is so confusing about this! Arrrg! Any advice would be appreciated. I'm not providing any code samples, because I believe that context is unnecessary here. I'm assuming that all DataTable objects work the same way, no matter how you run your queries - and therefore any additional information would just make this more confusing for everyone.

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• postgres - ERROR: syntax error at or near "COST"

  - by cino21122

  EDIT Taking COST 100 out made the command go through, however, I'm still unable to run my query because it yields this error: ERROR: function group_concat(character) does not exist HINT: No function matches the given name and argument types. You may need to add explicit type casts. The query I'm running is this: select tpid, group_concat(z) as z, group_concat(cast(r as char(2))) as r, group_concat(to_char(datecreated,'DD-Mon-YYYY HH12:MI am')) as datecreated, group_concat(to_char(datemodified,'DD-Mon-YYYY HH12:MI am')) as datemodified from tpids group by tpid order by tpid, zip This function seems to work fine locally, but moving it online yields this error... Is there something I'm missing? CREATE OR REPLACE FUNCTION group_concat(text, text) RETURNS text AS $BODY$ SELECT CASE WHEN $2 IS NULL THEN $1 WHEN $1 IS NULL THEN $2 ELSE $1 operator(pg_catalog.||) ',' operator(pg_catalog.||) $2 END $BODY$ LANGUAGE 'sql' IMMUTABLE COST 100; ALTER FUNCTION group_concat(text, text) OWNER TO j76dd3;

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• How to make Visual Studio Pause after executing a console app in debug mode?

  - by Jason Dagit

  I have a collection of boost unit tests I want to run as a console application. When I'm working on the project and I run the tests I would like to be able to debug the tests and I would like to have the console stay open after the tests run. I see that if I run in release mode the console window stays up after the program exits, but in debug mode this is not the case. I do not want to add 'system("pause");' or any other hacks like reading a character to my program. I just want to make Visual Studio pause after running the tests with debugging like it would if I were running in release mode. I would also like it if the output of tests were captured in one of Visual Studio's output windows but that also seems to be harder than it should be. How can I do this? Thanks!

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• PHP: Alternative to SESSIONS

  - by iamjonesy

  Hi, I have a PHP application that relies on session variables quite a lot. After login the user get redirected to a page that executes code to set up a load of session variables depending on who the user is. The application is using data from different sources and the sessions are used to store ID numbers to query the databases. So when the user goes to a page that will query their asset management system their ID for that particular database is called via the session. I've had a LOT of problems with session variables recently. Sometimes only one session file is created during the lifetime of the app, and sometimes each session request results in a new session id (still haven't managed to find out why!). My question is this. Is there an alternative to using session variables for this? Like globals or some other way? Any help most appreciated! Regards, Jonesy

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• Has anyone worked on caching?

  - by Rishabh Ohri

  Is there anyone who can answer my questions on SqlCachedependency Cache Invalidation Query Notifications etc etc etc

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• perl escaping \n or \t

  - by Michael

  I need to escape \n so on output I really get newline or tab $ perl -p -e 's/e/a/ge' now I want each e to be substituted with \n $ perl -p -e 's/e/\n/ge' but even \n gives me an error. this was a simplified example. In real script(makefile) I have substitute := perl -p -e 's/@([^@]+)@/defined $$ENV{$$1} ? $$ENV{$$1} : $$1/ge' and in target I have such a nice command $(substitute) $< > $@ and if the input file for perl contains \n at output I will see it literally... I want to have real newline.

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• SQL DISTINCT Value Question

  - by CPOW

  How can I filter my results in a Query? example I have 5 Records John,Smith,apple Jane,Doe,apple Fred,James,apple Bill,evans,orange Willma,Jones,grape Now I want a query that would bring me back 3 records with the DISTINCT FRUIT, BUT... and here is the tricky part, I still want the columns for First Name , Last Name. PS I do not care which of the 3 it returns mind you, but I need it to only return 3 (or what ever how many DISTINCT fruit there are. ex return would be John,Smith,apple Bill,evans,orange Willma,Jones,grape Thanks in advance I've been banging my head on this all day.

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• ModelState.AddModelError encodes HTML

  - by NTulip

  Hi I am noticing a weird issue when using ModelState.AddModelError to validate input on my forms. The output from Html.ValidationMessage is not the true HTML value but it's encoded value and so the CSS style is not applied to the error message. Example: private string errorMessage = "<span class=\"negative\">{0}</span><br class=\"hid\" />"; ModelState.AddModelError("title", String.Format(errorMessage, "Tab title is required")); The output is shown as: <span class="field-validation-error">&lt;span class=&quot;negative&quot;&gt;URL is Required&lt;/span&gt;&lt;br class=&quot;hid&quot; /&gt;</span> This didn't use to be the case with their earlier beta's and I am not sure what approach to take here. Thanks Nick

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• SQL Server 2008 Management Studio doesn't recognize new Schema

  - by Lieven Cardoen

  I have created a new Schema in a database called Contexts. Now when I want to write a query, Management Studio doesn't recognize the tables that belong to the new Schema. It says: 'Invalid object name Contexts.ContextLibraries'... Transact-SQL: INSERT INTO [Contexts].[ContextLibraries] (ChannelId, [IsSystem]) VALUES (@ChannelId, 1) When I try the same thing on my local database, it does work... Any ideas? I did try to change the Default schema for the user from dbo to Contexts but this doesn't work. Also checked Contexts in Schemas owned by this user without success. Update: Apparently the sql query does work but the editor gives a fault saying the object is invalid.

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• jQuery hide ul header when all entries are deleted...

  - by Scott

  I'm a noob with jQuery...and I hope I've explained this well enough; I have a <ul> header that appears when I've added an entry to a dynamically created list using $.post. Each entry added has a delete/edit button associated with it. Header is this: <ul class="header"> <li>Month</li> <li>Year</li> <li>Cottage</li> </ul> My dynamic list that is created: <ul class="addedItems"> <li>Month</li> <li>Year</li> <li>Cottage</li> <li><span class="edit">edit</span></li> <li><span class="del">delete</span></li> </ul> This all looks like this: Month Year Cottage <--this appears after I've added an entry -------------------------------- and I want it to stick around unless all items are deleted. Dec 1990 Fir edit/delete <--entries Jan 2000 Willow edit/delete My question is: Is there some kind of conditional that I can use with jQuery to hide the class="header" if all the items are deleted? I've read up on conditional statements like is and not with jq but I'm not really understanding how they work. All of the items in class="addedItems" is stored in data produced by JSON. This is the delete function: $(".del").live("click", function(){ var del = this; var thisVal = $(del).val(); $.post("delete.php", { dirID : thisVal }, function(data){ if(confirm("Are you sure you want to DELETE this entry?") == true) { if(data.success) { //hide the class="header" here somwhere?? $(del).parents(".addedItems").hide(); } else if(data.error) { // throw error if item does not delete } } }, "json"); return false; }); //end of .del function Here is the delete.php <?php if($_POST) { $data['delID'] = $_POST['dirID']; $query = "DELETE from //tablename WHERE dirID = '{$data['delID']}' LIMIT 1"; $result = $db->query($query); if($result) { $data['success'] = true; $data['message'] = "Entry was successfully removed."; } else { $data['error'] = true; $data['message'] = "Item could not be deleted."; } echo json_encode($data); } ?>

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• Function for putting all database to an array

  - by jasmine

  I have written a function to print database to an array like this Array( ID=>1, PARENTID =>1, TITLE => LIPSUM, TEXT =>LIPSUM ) My function is: function dbToArray($db) { $allArrays =array(); $query = mysql_query("SELECT * FROM $db"); $dbRow = mysql_fetch_array($query); for ($i=0; $i<count($dbRow) ; $i++) { $allArrays[$i] = $dbRow; } $txt .='<pre>'; $txt .= print_r($allArrays); $txt .= '</pre>'; return $txt; } Anything wrong in my function. Any help is appreciated about my problem. Thanks in advance

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• mySQL experts - need help with 'intersect'

  - by MTCreations

  I know that mySQL 5.x does not support INTERSECT, but that seems to be what I need. Table A: Products (p_id) Table B: Prod_cats (cat_id) - category info (name, description, etc) Table C: prod_2cats (p_id, cat_id) - many to many prod_2cats holds the many (1 or more) categories that have been assigned to Products (A). Doing a query/filter lookup, (user interactive) and need to be able to select across multiple categories the products that meet ALL the criteria. Ex: - 80 products assigned to Category X - 50 products assigned to Category Y - but only 10 products (intersect) are assigned to BOTH cat X AND cat Y This sql works for one category: SELECT * FROM products WHERE p_show='Y' AND p_id IN ( SELECT p_id FROM prods_2cats AS PC WHERE PC.cat_id =" . $cat_id ." <-$cat_id is sanitized var passed from query form . I can't seem to find the means to say ' give me the intersect of cat A and cat B' and get back the subset (10 records, from my example) Help!

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• MS SQL Server: how to optimize "like" queries?

  - by duke84

  I have a query that searches for clients using "like" with wildcard. For example: SELECT TOP (10) [t0].[CLIENTNUMBER], [t0].[FIRSTNAME], [t0].[LASTNAME], [t0].[MI], [t0].[MDOCNUMBER] FROM [dbo].[CLIENT] AS [t0] WHERE (LTRIM(RTRIM([t0].[DOCREVNO])) = '0') AND ([t0].[FIRSTNAME] LIKE '%John%') AND ([t0].[LASTNAME] LIKE '%Smith%') AND ([t0].[SSN] LIKE '%123%') AND ([t0].[CLIENTNUMBER] LIKE '%123%') AND ([t0].[MDOCNUMBER] LIKE '%123%') AND ([t0].[CLIENTINDICATOR] = 'ON') It can also use less parameters in "where" clause, for example: SELECT TOP (10) [t0].[CLIENTNUMBER], [t0].[FIRSTNAME], [t0].[LASTNAME], [t0].[MI], [t0].[MDOCNUMBER] FROM [dbo].[CLIENT] AS [t0] WHERE (LTRIM(RTRIM([t0].[DOCREVNO])) = '0') AND ([t0].[FIRSTNAME] LIKE '%John%') AND ([t0].[CLIENTINDICATOR] = 'ON') Can anybody tell what is the best way to optimize performance of such query? Maybe I need to create an index? This table can have up to 1000K records in production.

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• Nhibernate Criteria Ignore Child Collection

  - by CocoB

  I have a simple one to many association in my model. The parent class has a collection of children. In the mapping files, the association is a one to many, eager-loaded, using fetchmode.join. This works fine, but how can I write a criteria query but NOT trigger the loading of the child collection? In other words, I want to query the parent and not have it generate the join in the resulting sql. I tried setting the fetch mode to lazy, but in that case Nhibernate generates two separate queries. I don't want the table for child queried at all.

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• SQL Server: how to optimize "like" queries?

  - by duke84

  I have a query that searches for clients using "like" with wildcard. For example: SELECT TOP (10) [t0].[CLIENTNUMBER], [t0].[FIRSTNAME], [t0].[LASTNAME], [t0].[MI], [t0].[MDOCNUMBER] FROM [dbo].[CLIENT] AS [t0] WHERE (LTRIM(RTRIM([t0].[DOCREVNO])) = '0') AND ([t0].[FIRSTNAME] LIKE '%John%') AND ([t0].[LASTNAME] LIKE '%Smith%') AND ([t0].[SSN] LIKE '%123%') AND ([t0].[CLIENTNUMBER] LIKE '%123%') AND ([t0].[MDOCNUMBER] LIKE '%123%') AND ([t0].[CLIENTINDICATOR] = 'ON') It can also use less parameters in "where" clause, for example: SELECT TOP (10) [t0].[CLIENTNUMBER], [t0].[FIRSTNAME], [t0].[LASTNAME], [t0].[MI], [t0].[MDOCNUMBER] FROM [dbo].[CLIENT] AS [t0] WHERE (LTRIM(RTRIM([t0].[DOCREVNO])) = '0') AND ([t0].[FIRSTNAME] LIKE '%John%') AND ([t0].[CLIENTINDICATOR] = 'ON') Can anybody tell what is the best way to optimize performance of such query? Maybe I need to create an index? This table can have up to 1000K records in production.

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• Rows in their own columns depending on their date and simbolized by 'x'

  - by Chandradyani

  Dear All, please help me since I'm newbie in SQL Server. I have a select query that currently produces the following results: DoctorName Team Visit date dr. As A 5 dr. Sc A 4 dr. Gh B 6 dr. Nd C 31 dr As A 7 Using the following query: SELECT d.DoctorName, t.TeamName, ca.VisitDate FROM cActivity AS ca INNER JOIN doctor AS d ON ca.DoctorId = d.Id INNER JOIN team AS t ON ca.TeamId = t.Id WHERE ca.VisitDate BETWEEN '1/1/2010' AND '1/31/2010' I want to produce the following: DoctorName Team 1 2 3 4 5 6 7 ... 31 Visited dr. As A x x ... 2 times dr. Sc A x ... 1 times dr. Gh B x ... 1 times dr. Nd C ... X 1 times

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• BDD for C# NUnit

  - by mjezzi

  I've been using a home brewed BDD Spec extension for writing BDD style tests in NUnit, and I wanted to see what everyone thought. Does it add value? Does is suck? If so why? Is there something better out there? Here's the source: https://github.com/mjezzi/NSpec There are two reasons I created this To make my tests easy to read. To produce a plain english output to review specs. Here's an example of how a test will look: -since zombies seem to be popular these days.. Given a Zombie, Peson, and IWeapon: namespace Project.Tests.PersonVsZombie { public class Zombie { } public interface IWeapon { void UseAgainst( Zombie zombie ); } public class Person { private IWeapon _weapon; public bool IsStillAlive { get; set; } public Person( IWeapon weapon ) { IsStillAlive = true; _weapon = weapon; } public void Attack( Zombie zombie ) { if( _weapon != null ) _weapon.UseAgainst( zombie ); else IsStillAlive = false; } } } And the NSpec styled tests: public class PersonAttacksZombieTests { [Test] public void When_a_person_with_a_weapon_attacks_a_zombie() { var zombie = new Zombie(); var weaponMock = new Mock<IWeapon>(); var person = new Person( weaponMock.Object ); person.Attack( zombie ); "It should use the weapon against the zombie".ProveBy( spec => weaponMock.Verify( x => x.UseAgainst( zombie ), spec ) ); "It should keep the person alive".ProveBy( spec => Assert.That( person.IsStillAlive, Is.True, spec ) ); } [Test] public void When_a_person_without_a_weapon_attacks_a_zombie() { var zombie = new Zombie(); var person = new Person( null ); person.Attack( zombie ); "It should cause the person to die".ProveBy( spec => Assert.That( person.IsStillAlive, Is.False, spec ) ); } } You'll get the Spec output in the output window: [PersonVsZombie] - PersonAttacksZombieTests When a person with a weapon attacks a zombie It should use the weapon against the zombie It should keep the person alive When a person without a weapon attacks a zombie It should cause the person to die 2 passed, 0 failed, 0 skipped, took 0.39 seconds (NUnit 2.5.5).

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• In cakePHP, how to retrieve joined result from multiple tables

  - by Manish Sharma

  Hi, can anyone tell me, how to retrieve joined result from multiple tables in cakePHP ( using cakePHP mvc architecture). For example, I have three tables to join (tbl_topics, tbl_items, tbl_votes. Their relationship is defined as following: a topic can have many items and an item can have many votes. Now I want to retrieve a list of topics with the count of all votes on all items for each topic. The SQL query for this is written below: SELECT Topic.*, count(Vote.id) voteCount FROM tbl_topics AS Topic LEFT OUTER JOIN tbl_items AS Item ON (Topic.id = Item.topic_id) LEFT OUTER JOIN tbl_votes AS Vote ON (Item.id = Vote.item_id); My problem is I can do it easily using $this-><Model Name>->query function, but this requires sql code to be written in the controller which I don't want. I'm trying to find out any other way to do this (like find()).

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• Successful SQL Injection despite PHP Magic Quotes

  - by Crimson

  I have always read that Magic Quotes do not stop SQL Injections at all but I am not able to understand why not! As an example, let's say we have the following query: SELECT * FROM tablename WHERE email='$x'; Now, if the user input makes $x=' OR 1=1 --, the query would be: SELECT * FROM tablename WHERE email='\' OR 1=1 --'; The backslash will be added by Magic Quotes with no damage done whatsoever! Is there a way that I am not seeing where the user can bypass the Magic Quote insertions here?

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• Return pre-UPDATE column values in PostgreSQL without using triggers, functions or other "magic"

  - by Python Larry

  I have a related question, but this is another part of MY puzzle. I would like to get the OLD VALUE of a Column from a Row that was UPDATEd... WITHOUT using Triggers (nor Stored Procedures, nor any other extra, non-SQL/-query entities). The query I have is like this: UPDATE my_table SET processing_by = our_id_info -- unique to this instance WHERE trans_nbr IN ( SELECT trans_nbr FROM my_table GROUP BY trans_nbr HAVING COUNT(trans_nbr) > 1 LIMIT our_limit_to_have_single_process_grab ) RETURNING row_id If I could do "FOR UPDATE ON my_table" at the end of the subquery, that'd be devine (and fix my other question/problem). But, that won't work: can't have this AND a "GROUP BY" (which is necessary for figuring out the COUNT of trans_nbr's). Then I could just take those trans_nbr's and do a query first to get the (soon-to-be-) former processing_by values. I've tried doing like: UPDATE my_table SET processing_by = our_id_info -- unique to this instance FROM my_table old_my_table JOIN ( SELECT trans_nbr FROM my_table GROUP BY trans_nbr HAVING COUNT(trans_nbr) > 1 LIMIT our_limit_to_have_single_process_grab ) sub_my_table ON old_my_table.trans_nbr = sub_my_table.trans_nbr WHERE my_table.trans_nbr = sub_my_table.trans_nbr AND my_table.processing_by = old_my_table.processing_by RETURNING my_table.row_id, my_table.processing_by, old_my_table.processing_by But that can't work; "old_my_table" is not viewable outside of the join; the RETURNING clause is blind to it. I've long since lost count of all the attempts I've made; I have been researching this for literally hours. If I could just find a bullet-proof way to lock the rows in my subquery - and ONLY those rows, and WHEN the subquery happens - all the concurrency issues I'm trying to avoid disappear... UPDATE: [WIPES EGG OFF FACE] Okay, so I had a typo in the non-generic code of the above that I wrote "doesn't work"; it does... thanks to Erwin Brandstetter, below, who stated it would, I re-did it (after a night's sleep, refreshed eyes, and a banana for bfast). Since it took me so long/hard to find this sort of solution, perhaps my embarrassment is worth it? At least this is on SO for posterity now... : What I now have (that works) is like this: UPDATE my_table SET processing_by = our_id_info -- unique to this instance FROM my_table AS old_my_table WHERE trans_nbr IN ( SELECT trans_nbr FROM my_table GROUP BY trans_nbr HAVING COUNT(*) > 1 LIMIT our_limit_to_have_single_process_grab ) AND my_table.row_id = old_my_table.row_id RETURNING my_table.row_id, my_table.processing_by, old_my_table.processing_by AS old_processing_by The COUNT(*) is per a suggestion from Flimzy in a comment on my other (linked above) question. (I was more specific than necessary. [In this instance.])

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• Silverlight 4 RIA does not return anything using DomainContext

  - by Savvas Sopiadis

  Hi everybody! Just learning Silverlight 4/RIA and i 'm stuck in a weird problem: setup an ASP.NET MVC project as the project hosting the Domain service. In this i tried to get data from the Domain Service which worked fine (i'm using a repository in it). Now i tried to setup a SL4 project. I though i do it the MVVM-way, so i decided to setup a ViewModel Class with the following code: public class ViewModel { OrganizationDomainContext dsCtxt = new OrganizationDomainContext(); public ViewModel() { EntityQuery<Culture> query = from cu in dsCtxt.GetAllCulturesQuery() select cu; LoadOperation<Culture> lo = dsCtxt.Load(query); } } The crazy thing about this is .. it doesn't return anything!!! What am i missing here? Thanks in advance

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• Visual Studio add-in to quickly test a code snippet

  - by Matti Virkkunen

  One thing I really love about languages such as Python is that if you have a piece of code you'd like to try out, you can just open the interactive shell and do it in seconds. Is there a Visual Studio add-in that does the same for C#? Basically what I'm looking for is something that opens up a window or tab with a text editor (preferably with code completion, because VS does it so nicely) and a button that runs the code and displays the output. Extra points for convenience features such as displaying complex output in a user-friendly way (think Firebug's console.log), automatically referencing all the assemblies the current project references, etc. I tried googling for a while, but either I fail at coming up with good keywords, or no-one has made an add-in like this. If there really is none, I'm considering making one myself.

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