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  • help converting sql to linq expression with count

    - by Philip
    I am trying to convert the following SQL into a LINQ expression SELECT COUNT(ID) AS Count, MyCode FROM dbo.Archive WHERE DateSent=@DateStartMonth AND DateSent<=@DateEndMonth GROUP BY MyCode and I have been trying to follow this webpage as an example http://stackoverflow.com/questions/606124/converting-sql-containing-top-count-group-and-order-to-linq-2-entities I got this so far but I am stuck on understanding the new part var res=(from p in db.Archives where (p.DateSent>= dateStartMonth) && (p.DateSent< dateToday) group p by p.MyCode into g select new { ??????MyCode = g.something?, MonthlyCount= g.Count() }); Thanks in advance for helping greatly appreciated Philip

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  • IEnumerable doesn't have Count

    - by Alexander
    I have the following method: public bool IsValid { get { return (GetRuleViolations().Count() == 0); } } public IEnumerable<RuleViolation> GetRuleViolations(){ //code here } Why is it that when I do .Count above it is underlined in red? I got the following error: Error 1 'System.Collections.Generic.IEnumerable' does not contain a definition for 'Count' and no extension method 'Count' accepting a first argument of type 'System.Collections.Generic.IEnumerable' could be found (are you missing a using directive or an assembly reference?) c:\users\a\documents\visual studio 2010\Projects\NerdDinner\NerdDinner\Models\Dinner.cs 15 47 NerdDinner

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  • MySql: Select all entries with count...

    - by Scarface
    Hey guys quick question, I have a query that I want to count all entries it finds, and select all so when I use while($row=mysql_fetch_assoc($query)){ it will list all entries. The problem I am encountering is that while, all the entries are successfully counted and the right number is listed, only the latest entry is select and listed when I echo $row['title']. If I delete , COUNT(*) as total then it selects all but I was wondering if it was possible to use count and select *. I was wondering if anyone knew what I am doing wrong? SELECT *, COUNT(*) as total FROM new_messages WHERE username='$session->username

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  • ActionScript find LineBreak in XML and count them

    - by Pepe Sanchez
    Hi, i have an XML that has line breaks like this: This is a text that has line breaks im reading that xml in action script.. and trying to count how many linebreaks are in the text. Here is my code.. it returns 0 , it should return 5 for the example. function countBreaks(str:String) : Number { var count:Number = 0; for (var i:Number = 0; i < str.length-1; i++) { if(str.charAt(i)+str.charAt(i+1) eq "\n") count++; } return count; } I appreciate any help :)

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  • Postfix count relayed messages per user

    - by Martino Dino
    I would like to know if it's possible to count the outgoing (relayed) messages on a per user basis in postfix. I'm managing a small commercial SMTP relay and decided that it would be nice to have a detailed daily report on how much mail a single user have sent (and eventually enforce some limits) possibly in realtime. I've looked almost everywhere and started to think that writing my own milter would be the way to go... Are you aware of anything that already exists for postfix that can count and report relayed mail for authenticated users (a script, milter or whatever)?

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  • Issue with maxWorkerThreads and thread count

    - by Kartik M
    I have created an ASP.NET application which creates threads in an infinite loop. I set maxWorkerThreads to 20 in processModel in machine.config. When I checked the Thread count in perfmon there was around 7000 threads created in worker process. In PageLoad() I have: using System.Threading; ... int count = 0; var threadList = new System.Collections.Generic.List<System.Threading.Thread>(); try { while (true) { Thread newThread = new Thread(ThreadStart(DummyCall), 1024); newThread.Start(); threadList.Add(newThread); count++; } } catch (Exception ex) { Response.Write(count + " : " + ex.ToString()); } Function: void DummyCall() { System.Threading.Thread.Sleep(1000000000); } How do I restrict thread creation in ASP.NET with IIS6/7?

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  • How to use group by and having count in Linq

    - by Luke
    I am having trouble trying to convert the following query from SQL to Linq, in particular with the having count and group by parts of the query: select ProjectID from ProjectAssociation where TeamID in ( select TeamID from [User] where UserID in (4)) group by ProjectID having COUNT(TeamID) = (select distinct COUNT(TeamID) from [User] where UserID in (4)) Any advice on how to do so would be much appreciated.

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  • count(*) is it really expensive ?

    - by Anil Namde
    I have a page where i have 4 tabs displaying 4 different reports based of different tables. Now i get row count of each tabled using select count() from table query and display number of rows available in each table on the tabs. Now with each page post back 5 count() queries are executed (4 to get counts and 1 for pagination) and 1 query for getting report. Now my question is should is count(*) query really expensive that i should keep the row counts (at least which are displayed on tab) in view state of page instead of queering each time? How much expensive it is ?

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  • how to create a subquery in sql using count based on outer query

    - by user1754716
    I hope someone can help me with this query. Basically I have two queries that I want to "combine". I want the second query as an extra column along with the first query. The first one is this : SELECT t_Item_Storage_Location.Storage_Loc_Nbr, t_Storage_Location.Storage_Loc_Type_Code, Count(t_Load.Load_Id) AS CurrentLoadCount, t_load.MMM_Id_Nbr FROM t_Load INNER JOIN (t_Storage_Location INNER JOIN t_Item_Storage_Location ON t_Storage_Location.Storage_Loc_Nbr = t_Item_Storage_Location.Storage_Loc_Nbr) ON (t_Load.Storage_Loc_Nbr = t_Item_Storage_Location.Storage_Loc_Nbr) AND (t_Load.MMM_Id_Nbr = t_Item_Storage_Location.MMM_Id_Nbr) where ((((t_Item_Storage_Location.MMM_Id_Nbr) Between '702004%' And '702011%') AND ((t_Item_Storage_Location.Storage_Loc_Nbr) Like '%A') AND ((t_Storage_Location.Storage_Loc_Type_Code)='CD') AND ((t_Load.Active_Status_Ind)='A') AND ((t_Load.QC_Status_Code) Like 'R%') AND ((t_Load.MMM_Facility_Code)='MC')) OR (((t_Item_Storage_Location.Storage_Loc_Nbr) Like '%B')) OR (((t_Item_Storage_Location.Storage_Loc_Nbr) Like '%C')) OR (((t_Item_Storage_Location.Storage_Loc_Nbr) Like '%D')) OR (((t_Item_Storage_Location.Storage_Loc_Nbr) Like '%E')) ) GROUP BY t_Item_Storage_Location.MMM_Id_Nbr, t_Item_Storage_Location.Storage_Loc_Nbr, t_Storage_Location.Storage_Loc_Type_Code, t_Load.MMM_Facility_Code, t_load.MMM_Id_Nbr HAVING Count(t_Load.Load_Id)<4 The second one, is based on the t_load.MMM_Id_Nbr of the first one. Basically I want a count of all the loads with that mmm_id_nbr. SELECT count(Load_ID) as LoadCount, MMM_Id_Nbr, storage_Loc_Nbr FROM t_load WHERE QC_Status_Code like 'R%' and mmm_Facility_Code ='MC' and Active_Status_Ind='A' GROUP by MMM_Id_Nbr, storage_loc_Nbr

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  • Excel wizardness needed - Group By, Sort, Count function help

    - by Chris
    Riddle me this: You have 3 part numbers with the same part name xyz, each with a quantity of 10 items. The items can be picked during the day or week, therefore changing the amount of items on hand. I know I need to use the group by, sort, count and perhaps sumif formulas to have a running count of the number of items on hand at the end of each day (which could be positive or negative). Help? it wont let me add an image because i'm a new user. 'Oops! Your edit couldn't be submitted because: * we're sorry, but as a spam prevention mechanism, new users aren't allowed to post images. Earn more than 10 reputation to post images. '

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  • Is there a better way to find the max count in a table

    - by nXqd
    select NV.PHG From Nhanvien NV Group by NV.phg Having count(nv.Manv) >= all (select count(NV.MANV from nhanvien nv group by nv.MANV)) I'm finding a better way to find the 'max count' NV of a PHG ( in this example ) . I think, we meet this case all the time when we do SQL, i should've a better way . Thanks for reading this :)

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  • Transaction count after EXECUTE indicates that a COMMIT or ROLLBACK TRANSACTION statement is missing

    - by Paresh
    I am getting the error from the application as following with SQL server 2005 "Transaction count after EXECUTE indicates that a COMMIT or ROLLBACK TRANSACTION statement is missing. Previous count = 1, current count = 0" How can i find the stage where this error raised? how can i found the missing transaction or the stored procedure where it is not committ or rollback?

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  • how to remove repeated record's from results linq to sql

    - by Sadegh
    hi, i want to remove repeated record's from results but distinct don't do this for me! why??? var results = (from words in _Xplorium.Words join wordFiles in _Xplorium.WordFiles on words.WordId equals wordFiles.WordId join files in _Xplorium.Files on wordFiles.FileId equals files.FileId join urls in _Xplorium.Urls on files.UrlId equals urls.UrlId where files.Title.Contains(query) || files.Description.Contains(query) orderby wordFiles.Count descending select new SearchResultItem() { Title = files.Title, Url = urls.Address, Count = wordFiles.Count, CrawledOn = files.CrawledOn, Description = files.Description, Lenght = files.Lenght, UniqueKey = words.WordId + "-" + files.FileId + "-" + urls.UrlId }).Distinct();

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  • MySQL: Get only count of result set.

    - by Varun
    I am using MVC with PHP/MySQL. Suppose I am using 10 functions with different queries for fetching details from the database. But at other times I may want to get only the count of the result that will be returned by the query. What is the standard way to handle such situation. Should I write 10 more functions which duplicate almost whole query and return only the count. Or Should I always return the count also with the result set Or I can pass a flag to indicate that the function should return count only, and then based on the flag I will dynamically generate the (select part of) query. Or Is there a better way?

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  • preg_match find multiple partial appearances of a word in a string

    - by Rubytastic
    Any regex gurus around here? its driving me crazy. Say I have this string: "bookstore books Booking" I want to count the number "books" appears in this and return the number. Currently I have this which is not working: $string = "bookstore books Booking"; if (preg_match_all('/\b[A-Z]+books\b/', $string, $matches)) { echo count($matches[0]) . " matches found"; } else { echo "match NOT found"; } On top of this the "books" inside the preg_match_all should become a $var Anyone an idea how to count correctly?

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  • Objective-C ref count and autorelease

    - by turbovince
    Hey guys, suppose the following code: int main (int argc, const char * argv[]) { //[...] Rectangle* myRect = [[Rectangle alloc] init]; Vector2* newOrigin = [[[Vector2 alloc] init] autorelease]; // ref count 1 [newOrigin setX: 50.0f]; [myRect setOrigin: newOrigin]; // ref count 2 [myRect.origin setXY: 25.0f :100.0f]; // ref count goes to 3... why ? [myRect release]; [pool drain]; return 0; } Rectangle's origin is declared as a (retain) synthesized property. Just wondering 2 things: Why does ref count goes to 3 when using the getter accessor of Rectangle's origin? Am I doing something wrong ? With a ref count of 3, I don't understand how this snippet of code cannot leak. Calling release on myRect will make it go down to 2 since I call release on the origin in dealloc(). But then, when does autorelease take effect? Thanks!

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  • Get the count of A -> B and B->A without duplicates

    - by TomGasson
    I have a table like so: index|from | to ------------------ 1 | ABC | DEF 2 | ABC | GHI 3 | ABC | GHI 4 | ABC | JKL 5 | ABC | JKL 6 | ABC | JKL 7 | DEF | ABC 8 | DEF | GHI 9 | DEF | JKL 10 | GHI | ABC 11 | GHI | ABC 12 | GHI | ABC 13 | JKL | DEF And I need to count how the total times between the points (regardless of direction) to get the result: A | B | count ----------------- ABC | DEF | 2 ABC | GHI | 5 ABC | JKL | 3 DEF | GHI | 1 DEF | JKL | 2 So far I can get: SELECT `a`.`from` as `A`, `a`.`to` as `B`, (`a`.`count` + `b`.`count`) as `count` FROM (SELECT `from`, `to`, count(*) as `count` FROM `table` GROUP BY 1,2) `a` LEFT OUTER JOIN (SELECT `from`,`to`, count(*) as `count` FROM `table` GROUP BY 1,2) `b` ON `a`.`from` = `b`.`to` AND `a`.`to` = `b`.`from` But I'm unsure how to remove the A/B swapped duplicates.

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  • mysql count rows and grop them by month

    - by user2661296
    I have a table called cc_calls and there I have many call records I want to count them and group them in months I have a timestamp called starttime and I can use that row to extract the month, also limit the count for 12 months the results should be like: Month Count January 768768 February 876786 March 987979 April 765765 May 898797 June 876876 July 786575 August 765765 September 689787 October 765879 November 897989 December 876876 Can anyone guide me or show me the mysql query that I need to get this result.

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  • Getting counts of 0 from a query with a double group by

    - by Maltiriel
    I'm trying to write a query that gets the counts for a table (call it item) categorized by two different things, call them type and code. What I'm hoping for as output is the following: Type Code Count 1 A 3 1 B 0 1 C 10 2 A 0 2 B 13 2 C 2 And so forth. Both type and code are found in lookup tables, and each item can have just one type but more than one code, so there's also a pivot (aka junction or join) table for the codes. I have a query that can get this result: Type Code Count 1 A 3 1 C 10 2 B 13 2 C 2 and it looks like (with join conditions omitted): SELECT typelookup.name, codelookup.name, COUNT(item.id) FROM typelookup LEFT OUTER JOIN item JOIN itemcodepivot RIGHT OUTER JOIN codelookup GROUP BY typelookup.name, codelookup.name Is there any way to alter this query to get the results I'm looking for? This is in MySQL, if that matters. I'm not actually sure this is possible all in one query, but if it is I'd really like to know how. Thanks for any ideas.

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  • Sort string based upon the count of characters Options

    - by prp
    Sample Data : input : "abcdacdc" Output : "cadb" here we have to sort strings in order of count of characters. If the count is same for characters. maintain the original order of the characters from input string. my approach: i have used array of 26 for maintaining occurrence of all characters and sort it then print it.But while doing so i am not able to maintain order in case if two characters have same count. please suggest any improvement or any other algo.

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  • Count the number of dates between two dates

    - by Matt Mitchell
    I'm looking to count the dates covered (inclusive) between two DateTimes (not .TotalDays) For example: 2012-2-1 14:00 to 2012-2-2 23:00 -> 2 2012-2-1 14:00 to 2012-2-2 10:00 -> 2 2012-2-1 14:00 to 2012-2-1 15:00 -> 1 2012-1-1 00:00 to 2012-12-31 23:59 -> 366 I can get this functionality with the code below: DateTime dt1 = new DateTime(2000,1,2,12,00,00); DateTime dt2 = new DateTime(2000,1,3,03,00,00); int count = 0; for (DateTime date = dt1; date.Date <= dt2.Date; date = date.AddDays(1)) count++; return count; Is there a better way?

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  • Count number of given object in a list with LINQ

    - by Aaginor
    I have a list which can contain multiple occurrences of the same object. Now I need to count, how often the given object is contained in this list. int count = 0; foreach (IMyObject item in myList) if (item == object2Count) count++; I am sure that this can be done nicer with LINQ, but LINQ is still a mystery to me. My first question is: How would I count the objects via LINQ and the second question: Will this LINQ version be slower or faster? I am using a ObservableCollection and the number of items in the list is usally rather small ... usally not more then 20. Thanks in advance, Frank

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