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• Linq to SQL: how get row security between write access??

  - by Francisco

  I would like to allow two threads to write in a table at the same time (I know the problem of updating the same row, but this would be a story apart). I need that in behalf of speed up the operations in my aplication (one thread could write in row X while another could do the same in row X+n instead of waiting the first to finalize). So, can I block rows instead of tables with Linq to SQL? Thanks.

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• What is the best GUI for Perl on Windows including a good GUI builder?

  - by panofish

  I want to build perl apps with a gui that: A: are windows compatible (no cygwin or the like) B: utilize a nice GUI builder C: is easily distributed (minimizing additional components that must be installed) D: has good documentation and tutorials for building and using the GUI E: is still be developed (has a future) and appears to be the future of perl GUIs Maybe someone could provide a table something like the following for the alternatives (wxperl, perlqt, tk gtk2...etc)?: tool1 = AB tool2 = CE tool3 = ACD ...

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• SQL Error with Order By in Subquery

  - by cagin

  Hi all. i m working sql server 2005. My query is: SELECT ( SELECT COUNT(1) FROM Seanslar WHERE MONTH(tarihi) = 4 GROUP BY refKlinik_id ORDER BY refKlinik_id) as dorduncuay And the error: The ORDER BY clause is invalid in views, inline functions, derived tables, subqueries, and common table expressions, unless TOP or FOR XML is also specified. How can i use order by in a sub query?

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• oracle collection not enough values

  - by john

  I did following: create or replace type my_row as object ( lname varchar2(30), fname varchar2(30), MI char(1), hohSSN char (9), hohname VARCHAR2(63), hohDob char(10), dob DATE ); create or replace type eiv.my_rec as table of eiv.my_row; but then doing query like: my_records my_rec select '', '', '', '', '', '', sysdate bulk collect into my_records from dual; gives error ORA-00947: not enough values what can i be doing wrong here?

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• Rails: Why does find_by not work on my ActiveRecord model?

  - by randombits

  I have a simple model named Foo. Foo has two columns, bar and foobar. Doing a simple Foo.find_by_bar("a") is returning nil. There is a record in the table where bar contains a. Also, what's even more troubling, is I don't see the query even happening in the development log. A simple Foo.find(1) works though.

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• How to turn such string into a data grid? (C# .Net)

  - by Ole Jak

  So I have such string (recived from php server... normal print_r of array) Array ( [item_number_in_array] => Array ( [id] => id_value [title] title_value_as_string_vith_spaces [content] => content_value_as_string_vith_spaces ) [item_number_in_array]... ) I need any how to represent it as table like this in C# How to do such thing?

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• How do I update a cumulative field in a Rails database (using ActiveRecord or Mongoid)?

  - by picardo

  I want to update a field in a database table that has to have a cumulative value. So basically I need to find the current value of the field and update it using a new number. My first inefficient try at this (in Mongoid) is: v = Landlord.where(:name=>"Lorem") v.update_attributes(:violations=>v.violations + 10) Is there a simple method than making one query to read, then sum up, and another query to write?

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• How to run an external program, e.g. notepad, using hyperlink?

  - by Nam Gi VU

  I'm generating an HTML report by C# to print pairs of files in a table which has 3 columns: the first two columns used for the filenames and the 3rd column is a hyperlink Compare - I want this link to run WinMerge to compare to two files and I currently don't know how to do it. Please help!

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• ASP .Net User Roles - ordering for a drop down.

  - by ilivewithian

  We are using the standard aspnet security features, we have need to set the order of the roles, purely for display purposes. We could just have a sequence number onto the end of the aspnet_roles table, but that feels kinds of hacky to me. Also if in future versions of asp the security get changed we will be in trouble. Is there a better way to do this that won't make me loose sleep each time a new version is pushed out?

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• MySQL: How can fetch SUM() of all fields in one Query?

  - by takpar

  Hi, I just want somthing like this: select SUM(*) from `mytable` group by `year` any suggestion? (I am using Zend Framework; if you have a suggestion using ZF rather than pure query would be great!) Update: I have a mass of columns in table and i do not want to write their name down one by one. No Idea??

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• MySQL Math - Is it possible to calculate a correlation in a query?

  - by John M

  In a MySQL (5.1) database table there is data that represents: how long a user takes to perform a task and how many items the user handled during the task. Would MySQL support correlating the data or do I need to use PHP/C# to calcuate? Where would I find a good formula to calculate correlation (it's been a long time since I last did this)?

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• Oracle Rows into Columns

  - by user2904845

  Can someone help me design the query to get below o/p. Data I have: Table X: Count Name Amount Days 5 ABC 500 Day1 10 ABC 1000 Day2 3 BCD 100 Day1 4 BDC 200 Day2 Result I need: Name Count AmountDay1 Count AmountDay2 ABC 5 500 10 1000 BCD 3 100 4 200 etc Is this Possible? I tried something with the below query, but not getting the desired o/p select * from X pivot (sum(amount) for days in ('Day1', 'Day2')) Please help I'm using Oracle 11 G

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• mysql select two prior to and one after NOW()

  - by Flavius

  Hi I have a table with a column event_time. How can I select two rows right before NOW() and the next one after NOW(), ordered by event_time? Is is possible with a single query?

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• sql count conditions

  - by user1311030

  there! I have this question, hope you guys can help me out. So i have this table with two fields: type and authorization in type i have 2 different values: Raid and Hold in authorization i have 2 different values: Accepted or Denied I need to make a view that returns values like this: TYPE:RAID ACCEPTED:5 DENIED:7 Basically i need to know how many of the values in TYPE are Raid, and then how many of them are Accepted and Denied. Thank you in advance!!

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• How do I write a PL/SQL anonymous block when I have discontinuous blocks?

  - by aryan

  I have to retrieve an ID and last_name from my table, but my ID is not continuous and there no pattern for the gaps. How do I write a PL/SQL anonymous block for this?

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• Selecting records with specific month and year in SQL Server 2005

  - by John

  I want to list records with a particular month and year. The table name is 'Arrival' and 'date' is the field that stores the date that the record was added. This is to be done from a C# application. For example, if the user selects month as 'April' and year as '2009' in the application, it will list all the records that were added on April,2009. (I only need the query, hope I can figure out the rest :) )

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• Problem with computed column with NDBUnit

  - by jess

  Hi, I am loading data for tests in tables using xml and ndbunit.But,for a table having computed column,I am having problem.I get this error The column "xyz" cannot be modified because it is either a computed column or is the result of a UNION operator. I have modified the INSERT and UPDATE commands(removed the computed column) of sqladapter in xsd file,but still face the issue. thanks

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• SQL, problem with OrderBy / GroupBy

  - by Tristan

  Hi, In my table I have two fields among others : article_id and *version* *example: article_id : 5 // version 1 aricle_id: 5 // version 2 article_id: 6 // version 1* What i want to do is to retrieve the latest version for each article id (in my example i want to retrieve the article 5 version 2 object and article 6 and version 1 object). The problem is that mysql is doing the groupBy instead of the OrderBy so it returns to me the FIRST version of each article, but i want the opposit. Do you have an idea please ?

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• Good Entity Framework sample applications?

  - by Abdu

  I am looking for some good asp.net sample applications which use Entity Framework. I saw a couple apps for NorthWind (one was MVC based). Looking for one with is more sophisticated than the simple apps at MSDN (HRSkillsCombined, CourseManager,AdWksSalesWinDataBind, ResearchCollaborationAssistant). Possibly using Entity Inheritance, multi table change tracking.. etc.

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• how to add a new value to a dropdown list in Rails

  - by LearnRails

  In my item table, I have a itemname column which is currently a dropdown list taking values from DB. <%= select 'item','itemname' , Item.find(:all).collect{|c| [c.itemname]},{:include_blank = 'Select Name'} How can I add a new value to this dropdown list through the application. Is there a provision to directly add value to the list? Thanks

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• Tsql ordering data by specific string values

  - by anteneh maru

  Hi every body I have an audit table that have data for insert, update and delete operations. I am writing a report that will display data in the order of Insert, Update and Delete. I don't think the order by clause will help. any help?

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• MySQL: Field 'id' doesn't have a default value

  - by yanis

  I want MySQL to autogenerate the id of a table so I have set AutoIncrement to TRUE but I get "Field 'id' doesn't have a default value". I even set a default value (=1 although I dont want a default value) but I get the same error.

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• need help on my query.

  - by Dharmendra

  i have one table : nobel(yr, subject, winner) and i have this query : In which years was the Physics prize awarded but no Chemistry prize. this is what i tried : select distinct yr from nobel where subject='physics' and subject!='chemistry' but is not working where i am going wrong. see, i am not here to make my homework from someone. i am here to learn something. so, please give me suggetion.

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• sql query returns incorrect result

  - by reza saberi

  I have a mysql database that stores quotation documents with some products that are clearly defining the price of each product in them, and a table for contracts storing contract details as well as customer code and quotation code to which it belongs. I have the following query to see how much is the total price of the quotation to write it in the invoice: select sum(sqproducts.price * sqproducts.quantity) as 'total-price', squotations.currency as 'currency' from sqproducts, ccontracts, squotations where sqproducts.contracted=1 AND squotations.code=sqproducts.quotation_code AND sqproducts.quotation_code=ccontracts.squotation_code AND sqproducts.quotation_code='QUOT/2012/1' group by currency

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• UITableView Reusable cells

  - by Michael

  Can someone explain me the way reusable cells works for single table view? How many reusable cells a datasource should create? So far in all samples I've seen only one. Would one even need more?

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