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  • How to create relationship between two tables with revisions using Entity Framework

    - by Chris Ridenour
    So I am in the process of redesigning a small database (and potentially a much larger one) but want to show the value of using revisions / history of the business objects. I am switching the data from Access to MSSQL 2008. I am having a lot of internal debate on what version of "revision history" to use in the design itself - and thought I had decided to add a "RevisionId" to all tables. With this design - adding a RevisionId to all tables we would like tracked - what would be the best way to create Navigational Properties and Relationships between two tables such as | Vendor | VendorContact | where a Vendor can have multiple contacts. The Contacts themselves will be under revision. Will it require custom extensions or am I over thinking this? Thanks in advance.

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  • Join Where Rows Don't Exist or Where Criteria Matches...?

    - by Greg
    I'm trying to write a query to tell me which orders have valid promocodes. Promocodes are only valid between certain dates and optionally certain packages. I'm having trouble even explaining how this works (see psudo-ish code below) but basically if there are packages associated with a promocode then the order has to have one of those packages and be within a valid date range otherwise it just has to be in a valid date range. The whole "if PrmoPackage rows exist" thing is really throwing me off and I feel like I should be able to do this without a whole bunch of Unions. (I'm not even sure if that would make it easier at this point...) Anybody have any ideas for the query? if `OrderPromoCode` = `PromoCode` then if `OrderTimestamp` is between `PromoStartTimestamp` and `PromoEndTimestamp` then if `PromoCode` has packages associated with it //yes then if `PackageID` is one of the specified packages //yes code is valid //no invalid //no code is valid Order: OrderID* | OrderTimestamp | PackageID | OrderPromoCode 1 | 1/2/11 | 1 | ABC 2 | 1/3/11 | 2 | ABC 3 | 3/2/11 | 2 | DEF 4 | 4/2/11 | 3 | GHI Promo: PromoCode* | PromoStartTimestamp* | PromoEndTimestamp* ABC | 1/1/11 | 2/1/11 ABC | 3/1/11 | 4/1/11 DEF | 1/1/11 | 1/11/13 GHI | 1/1/11 | 1/11/13 PromoPackage: PromoCode* | PromoStartTimestamp* | PromoEndTimestamp* | PackageID* ABC | 1/1/11 | 2/1/11 | 1 ABC | 1/1/11 | 2/1/11 | 3 GHI | 1/1/11 | 1/11/13 | 1 Desired Result: OrderID | IsPromoCodeValid 1 | 1 2 | 0 3 | 1 4 | 0

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  • Picking Random Names

    - by Jasl
    I saw an interesting post sometime back but with no solution. Trying luck here: There is a table which contain 10 names (U1, U2, U3..and so on). I have to choose 5 names everyday, and display one as the Editor and 4 as Contributors While selecting the random names, I have to also consider that if one user is selected as Editor, he cannot become editor again till everyone got their chance. The output should look similar to the following: Editor Cont1 Cont2 Cont3 Cont4 20-Jun U1 U8 U9 U3 U4 21-Jun U7 U2 U5 U6 U10 22-Jun U3 U4 U9 U2 U8 23-Jun U4 U8 U3 U5 U2 and so on..

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  • Database design: Calculating the Account Balance

    - by 001
    How do I design the database to calculate the account balance? 1) Currently I calculate the account balance from the transaction table In my transaction table I have "description" and "amount" etc.. I would then add up all "amount" values and that would work out the user's account balance. I showed this to my friend and he said that is not a good solution, when my database grows its going to slow down???? He said I should create separate table to store the calculated account balance. If did this, I will have to maintain two tables, and its risky, the account balance table could go out of sync. Any suggestion? EDIT: OPTION 2: should I add an extra column to my transaction tables "Balance". now I do not need to go through many rows of data to perform my calculation. Example John buys $100 credit, he debt $60, he then adds $200 credit. Amount $100, Balance $100. Amount -$60, Balance $40. Amount $200, Balance $240.

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  • SSIS - Skip Missing Files

    - by Greg
    I have a SSIS 2008 package that calls about 10 other SSIS packages (legacy issues, don't ask). Each of those child packages loads a specific file into a table. But sometimes one or more of these input files will be missing. How can I let a child package fail (because a file is missing) but let the rest of the parent package keep on running? I've tried increasing the maximum error count on the parent package, the tasks in the parent package that call each child, and in the child package itself. None of that seemed to make any difference. I still get this error when I run it with a file missing: SSIS Warning Code DTS_W_MAXIMUMERRORCOUNTREACHED. The Execution method succeeded, but the number of errors raised (2) reached the maximum allowed (1); resulting in failure. This occurs when the number of errors reaches the number specified in MaximumErrorCount. Change the MaximumErrorCount or fix the errors. Edit: failpackageonfailure and faulparentonfailure are already all set to false everywhere.

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  • Manage DNS Zone in "slave" Mode with MS Windows 2008 R2

    - by kockiren
    Hello @all following issue, I configure a DNS Zone "location.domain.tld" for my internal Network and it works well, but now I want to manage the domain.tld for my internal Network, but the domain.tld is managed by an external DNS Provider. In location.domain.tld there are all Clients and Servers for internal use only (with local IPs) all these clients resolve the global Mailserver (for example) over his external Address but now i want to catch single Domainnames and resolve it on my own way. But i did not find a way to solve this issue. Any Ideas? Regards Rene

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  • Using ASP.NET session state with Silverlight (PRISM)

    - by Jon Andersen
    Hi, The scenario: I have a PRISM application developed in Silverlight (4), and I'm using a ASP.NET server side application to host several web-services (which, in turn, accesses WCF-services, but that's not really important here). The Silverlight application must be able to call the web services cross-domain (meaning that the web services isn't necessarily on the same server hosting the silverlight application). The Silverlight application consists of several modules, each accessing the ASP.NET web-services. I do not have much experience with Silverlight and PRISM, but as far as I can see, this is not a very unusual scenario... The problem: My challange is, that when 2 different modules access the web-services, I get 2 new sessions on the web-server. I would have thought that since both modules live on the same HTML-page (and then also in the same browser session), they would get the same session on the web-server...? I have tried to make the web-service Proxy-client globally available in the container (using Unity), by registering an instance (using Container.RegisterInstance), and then getting this instance whenever a module needs to make a web-service call (using Container.Resolve), but this doesn't seem to help. However, any calls made within the same module always gets the same session on the server. Can anyone see what I'm missing here...? Thanks! Jon

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  • Most optimal way to convert to date

    - by IMHO
    I have legacy system where all date fields are maintained in YMD format. Example: 20101123 this is date: 11/23/2010 I'm looking for most optimal way to convert from number to date field. Here is what I came up with: declare @ymd int set @ymd = 20101122 select @ymd, convert(datetime, cast(@ymd as varchar(100)), 112) This is pretty good solution but I'm wandering if someone has better way doing it

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  • building list of child objects inside main object

    - by Asdfg
    I have two tables like this: Category: Id Name ------------------ 1 Cat1 2 Cat2 Feature: Id Name CategoryId -------------------------------- 1 F1 1 2 F2 1 3 F3 2 4 F4 2 5 F5 2 In my .Net classes, i have two POCO classes like this: public class Category { public int Id {get;set;} public int Name {get;set;} public IList<Feature> Features {get;set;} } public class Feature { public int Id {get;set;} public int CategoryId {get;set;} public int Name {get;set;} } I am using a stored proc that returns me a result set by joining these 2 tables. This is how my Stored Proc returns the result set. SELECT c.CategoryId, c.Name Category, f.FeatureId, f.Name Feature FROM Category c INNER JOIN Feature f ON c.CategoryId = f.CategoryId ORDER BY c.Name --Resultset produced by the above query CategoryId CategoryName FeatureId FeatureName --------------------------------------------------- 1 Cat1 1 F1 1 Cat1 2 F2 2 Cat2 3 F3 2 Cat2 4 F4 2 Cat2 5 F5 Now if i want to build the list of categories in my .Net code, i have to loop thru the result set and add features unless the category changes. This is how my .Net code looks like that builds Categories and Features. List<Category> categories = new List<Category>(); Int32 lastCategoryId = 0; Category c = new Category(); using (SqlDataReader reader = cmd.ExecuteReader()) { while (reader.Read()) { //Check if the categoryid is same as previous one. //If Not, add new category. //If Yes, dont add the category. if (lastCategoryId != Convert.ToInt32(reader["CategoryId"])) { c = new Category { Id = Convert.ToInt32(reader["CategoryId"]), Name = reader["CategoryName"].ToString() }; c.Features = new List<Feature>(); categories.Add(c); } lastCategoryId = Convert.ToInt32(reader["CategoryId"]); //Add Feature c.Features.Add(new Feature { Name = reader["FeatureName"].ToString(), Id = Convert.ToInt32(reader["FeatureId"]) }); } return categories; } I was wondering if there is a better way to do build the list of Categories?

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  • T-SQL QUERY PROBLEM

    - by Sam
    Hi All, I have table called Summary and the data in the table looks like this: ID Type Name Parent 1 Act Rent Null 2 Eng E21-01-Rent Rent 3 Prj P01-12-Rent E21-Rent 1 Act Fin Null 2 Eng E13-27-Fin Fin 3 Prj P56-35-Fin E13-Fin I am writing a SP which has to pull the parent based on type. Here always the type Act has ID 1, Eng has ID 2 and Prj has ID 3. The type ACT parent is always NUll, type Eng parent is Act and type Prj parent is Eng Now I have table called Detail.I am writing a SP to insert Detail Table data to the Summary table. I am passing the id as parameter: I am having problem with the parent. How do I get that? I can always say when ID is 1 then parent is Null but when ID is 2 then parent is name of ID 1 similarly when ID is 3 then parent is name of ID2. How do I get that? Can anyone help me with this:

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  • Help with a t-sql query

    - by user324650
    Hi Based on the following table Path ---------------------- area1 area1\area2 area1\area2\area3 area1\area2\area3\area4 area1\area2\area5 area1\area2\area6 area1\area7 Input to my stored procedure is areapath and no.of children (indicates the depth that needs to considered from the input areapath) areapath=area1 children=2 Above should give Path ----------- area1 area1\area2 area1\area2\area3 area1\area2\area5 area1\area2\area6 area1\area7 similary for areapath=area2 and children=1 output should be Path --------------- area1\area2 area1\area2\area3 area1\area2\area5 area1\area2\area6 I am confused how to write a query for this one.

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  • How to list all duplicated rows which may include NULL columns?

    - by Yousui
    Hi guys, I have a problem of listing duplicated rows that include NULL columns. Lemme show my problem first. USE [tempdb]; GO IF OBJECT_ID(N'dbo.t') IS NOT NULL BEGIN DROP TABLE dbo.t END GO CREATE TABLE dbo.t ( a NVARCHAR(8), b NVARCHAR(8) ); GO INSERT t VALUES ('a', 'b'); INSERT t VALUES ('a', 'b'); INSERT t VALUES ('a', 'b'); INSERT t VALUES ('c', 'd'); INSERT t VALUES ('c', 'd'); INSERT t VALUES ('c', 'd'); INSERT t VALUES ('c', 'd'); INSERT t VALUES ('e', NULL); INSERT t VALUES (NULL, NULL); INSERT t VALUES (NULL, NULL); INSERT t VALUES (NULL, NULL); INSERT t VALUES (NULL, NULL); GO Now I want to show all rows that have other rows duplicated with them, I use the following query. SELECT a, b FROM dbo.t GROUP BY a, b HAVING count(*) > 1 which will give us the result: a b -------- -------- NULL NULL a b c d Now if I want to list all rows that make contribution to duplication, I use this query: WITH duplicate (a, b) AS ( SELECT a, b FROM dbo.t GROUP BY a, b HAVING count(*) > 1 ) SELECT dbo.t.a, dbo.t.b FROM dbo.t INNER JOIN duplicate ON (dbo.t.a = duplicate.a AND dbo.t.b = duplicate.b) Which will give me the result: a b -------- -------- a b a b a b c d c d c d c d As you can see, all rows include NULLs are filtered. The reason I thought is that I use equal sign to test the condition(dbo.t.a = duplicate.a AND dbo.t.b = duplicate.b), and NULLs cannot be compared use equal sign. So, in order to include rows that include NULLs in it in the last result, I have change the aforementioned query to WITH duplicate (a, b) AS ( SELECT a, b FROM dbo.t GROUP BY a, b HAVING count(*) > 1 ) SELECT dbo.t.a, dbo.t.b FROM dbo.t INNER JOIN duplicate ON (dbo.t.a = duplicate.a AND dbo.t.b = duplicate.b) OR (dbo.t.a IS NULL AND duplicate.a IS NULL AND dbo.t.b = duplicate.b) OR (dbo.t.b IS NULL AND duplicate.b IS NULL AND dbo.t.a = duplicate.a) OR (dbo.t.a IS NULL AND duplicate.a IS NULL AND dbo.t.b IS NULL AND duplicate.b IS NULL) And this query will give me the answer as I wanted: a b -------- -------- NULL NULL NULL NULL NULL NULL NULL NULL a b a b a b c d c d c d c d Now my question is, as you can see, this query just include two columns, in order to include NULLs in the last result, you have to use many condition testing statements in the query. As the column number increasing, the condition testing statements you need in your query is increasing astonishingly. How can I solve this problem? Great thanks.

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  • blank to numeric conversion derived column

    - by praveen
    Hi All, I have a source column with blank (not "NULL"), and target as numeric. while converting using the data conversion it is not converting due to balnk source value so I used derived column to replace a blank value with NULL or 0 as (source column == " ") ? "0" : source column but its not giving the value as 0 in the blank place. thanks prav

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  • How to do a case sensitive GROUP BY?

    - by Abe Miessler
    If I execute the code below: with temp as ( select 'Test' as name UNION ALL select 'TEST' UNION ALL select 'test' UNION ALL select 'tester' UNION ALL select 'tester' ) SELECT name, COUNT(name) FROM temp group by name It returns the results: TEST 3 tester 2 Is there a way to have the group by be case sensitive so that the results would be: Test 1 TEST 1 test 1 tester 2

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  • How to configure apache to basic authentication or allow when ntlm while proxying?

    - by trotzim
    Here is my study case: browser --- apache proxy --- ISA server --- internet The ISA server requires an authentication. The issue is to allow HTTPS through the two proxies. A configuration that works with HTTP is something like this: (yes, I don't want to use ProxyPass but ProxyRequests) <virtualhost *:8080> ... SetEnv auth-proxy-chain on ... ProxyRequests On ProxyRemote * http://isaproxy:80 ... <proxy *> AuthName "ISA server auth" AuthType Basic [here a module to authenticate] require valid-user Allow from all </proxy> ... </virtualhost> The user can authenticate on the apache proxy then the authentication chain is sent to the ISA server that allows the HTTP trafic. But, while the browser switchs to HTTPS, the ISA server "speaks" NTLM and breaks the authentication on the apache proxy. If I try to use the SSPI module (ntlm) with something like this: blablabla <proxy *> AuthName "ISA server auth" AuthType ntlm [ SSPI stuff ] Require valid-user Allow from all </proxy> The apache server reject the authentication (or the ISA server I don't really know). I use wireshark to look at the nominal process while using directly the ISA server as proxy. The first auth-chain is a BASIC type then it switchs to NTLM (and the challenge continues with NTLM). How should I configure apache that it transfers the NTLM authentication to the ISA proxy without checking it(*)? Or to rewrite headers to force BASIC authentication? (*) It seems not to be as easy as it seems...

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  • Ajax doesn't work on remote server .

    - by Nuha
    Hello . when I Implemented chatting Function , I use Ajax to send messages between file to another . so , it is working well on local host . but , when I upload it in to remote server it doesn't work. can U tell me ,why ? is an Ajax need Special configuration ? Ajax code : function Ajax_Send(GP,URL,PARAMETERS,RESPONSEFUNCTION){? var xmlhttp? try{xmlhttp=new ActiveXObject("Msxml2.XMLHTTP")}? catch(e){? try{xmlhttp=new ActiveXObject("Microsoft.XMLHTTP")}? catch(e){? try{xmlhttp=new XMLHttpRequest()}? catch(e){? alert("Your Browser Does Not Support AJAX")}}}? ? err=""? if (GP==undefined) err="GP "? if (URL==undefined) err +="URL "? if (PARAMETERS==undefined) err+="PARAMETERS"? if (err!=""){alert("Missing Identifier(s)\n\n"+err);return false;}? ? xmlhttp.onreadystatechange=function(){? if (xmlhttp.readyState == 4){? if (RESPONSEFUNCTION=="") return false;? eval(RESPONSEFUNCTION(xmlhttp.responseText))? }? }? ? if (GP=="GET"){? URL+="?"+PARAMETERS? xmlhttp.open("GET",URL,true)? xmlhttp.send(null)? }? ? if (GP="POST"){? PARAMETERS=encodeURI(PARAMETERS)? xmlhttp.open("POST",URL,true)? xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded")? xmlhttp.setRequestHeader("Content-length",PARAMETERS.length)? xmlhttp.setRequestHeader("Connection", "close")? xmlhttp.send(PARAMETERS)? }? }

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  • How to handle model state errors in ajax-invoked controller action that returns a PartialView

    - by Robert Koritnik
    I have a POST controller action that returns a partial view. Everything seems really easy. but. I load it using $.ajax(), setting type as html. But when my model validation fails I thought I should just throw an error with model state errors. But my reply always returns 500 Server error. How can I report back model state errors without returning Json with whatever result. I would still like to return partial view that I can directly append to some HTML element. Edit I would also like to avoid returning error partial view. This would look like a success on the client. Having the client parse the result to see whether it's an actual success is prone to errors. Designers may change the partial view output and this alone would break the functionality. So I want to throw an exception, but with the correct error message returned to the ajax client.

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  • Trigger an action to increment all rows of an int column which are greater than or equal to the inserted row

    - by Dev
    I am performing some insertion to an SQL table with has three columns and several rows of data The three columns are Id,Product,ProductOrder with the following data Id Product ProductOrder 1 Dell 1 2 HP 3 3 lenovo 2 4 Apple 10 Now, I would like a trigger which fires an action and increments all the ProductOrders by 1which are greater than or equal to the inserted ProductOrder. For example, I am inserting a record with Id=5 Product=Sony, ProductOrder=2 Then it should look for all the products with ProductOrder greater than or equal to 2 and increment them by 1. So, the resultant data in the SQL table should be as follows Id Product ProductOrder 1 Dell 1 2 HP 4 3 lenovo 3 4 Apple 11 5 Sony 2 From above we can see that ProductOrder which are equal or greater than the inserted are incremented by 1 like HP,Lenovo,Apple May I know a way to implement this?

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  • T-SQL MERGE - finding out which action it took

    - by IanC
    I need to know if a MERGE statement performed an INSERT. In my scenario, the insert is either 0 or 1 rows. Test code: DECLARE @t table (C1 int, C2 int) DECLARE @C1 INT, @C2 INT set @c1 = 1 set @c2 = 1 MERGE @t as tgt USING (SELECT @C1, @C2) AS src (C1, C2) ON (tgt.C1 = src.C1) WHEN MATCHED AND tgt.C2 != src.C2 THEN UPDATE SET tgt.C2 = src.C2 WHEN NOT MATCHED BY TARGET THEN INSERT VALUES (src.C1, src. C2) OUTPUT deleted.*, $action, inserted.*; SELECT inserted.* The last line doesn't compile (no scope, unlike a trigger). I can't get access to @action, or the output. Actually, I don't want any output meta data. How can I do this?

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  • Pass a variable into a trigger

    - by Codesleuth
    I have a trigger which deals with some data for logging purposes like so: CREATE TRIGGER trgDataUpdated ON tblData FOR UPDATE AS BEGIN INSERT INTO tblLog ( ParentID, OldValue, NewValue, UserID ) SELECT deleted.ParentID, deleted.Value, inserted.Value, @intUserID -- how can I pass this in? FROM inserted INNER JOIN deleted ON inserted.ID = deleted.ID END How can I pass in the variable @intUserID into the above trigger, as in the following code: DECLARE @intUserID int SET @intUserID = 10 UPDATE tblData SET Value = @x PS: I know I can't literally pass in @intUserID to the trigger, it was just used for illustration purposes.

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  • How to lock a table for inserting in sql?

    - by Nandini
    hi, i have a web application in which i have a page named 'Data'.Many people will try to insert data into the table at a given time.So the reference no other than the primary key will get duplicated which should not be permitted.For inserting the data into the DB table, i am using a stored procedure in SQL.In my vb.net web application, i am using Business layer with enterprise library for calling the stored procedure.Now i want to lock the table for inserting so that when multiple user inserts, there wont be any complication.How can i do this?Please advice Regards

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