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  • how to create a linq query using join and max

    - by geoff swartz
    I have 2 tables in my linq dbml. One is people with a uniqueid called peopleid and the other is a vertical with a foreign key for peopleid and a uniqueid called id. I need to create a type of linq query that does a left outer join on people and gets the latest record in the vertical table based off the max(id) column. Can anyone suggest what this should look like? Thanks.

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  • How do I change a child's parent in NHibernate when cascade is delete-all-orphan?

    - by Daniel T.
    I have two entities in a bi-directional one-to-many relationship: public class Storage { public IList<Box> Boxes { get; set; } } public class Box { public Storage CurrentStorage { get; set; } } And the mapping: <class name="Storage"> <bag name="Boxes" cascade="all-delete-orphan" inverse="true"> <key column="Storage_Id" /> <one-to-many class="Box" /> </bag> </class> <class name="Box"> <many-to-one name="CurrentStorage" column="Storage_Id" /> </class> A Storage can have many Boxes, but a Box can only belong to one Storage. I have them mapped so that the one-to-many has a cascade of all-delete-orphan. My problem arises when I try to change a Box's Storage. Assuming I already ran this code: var storage1 = new Storage(); var storage2 = new Storage(); storage1.Boxes.Add(new Box()); Session.Create(storage1); Session.Create(storage2); The following code will give me an exception: // get the first and only box in the DB var existingBox = Database.GetBox().First(); // remove the box from storage1 existingBox.CurrentStorage.Boxes.Remove(existingBox); // add the box to storage2 after it's been removed from storage1 var storage2 = Database.GetStorage().Second(); storage2.Boxes.Add(existingBox); Session.Flush(); // commit changes to DB I get the following exception: NHibernate.ObjectDeletedException : deleted object would be re-saved by cascade (remove deleted object from associations) This exception occurs because I have the cascade set to all-delete-orphan. The first Storage detected that I removed the Box from its collection and marks it for deletion. However, when I added it to the second Storage (in the same session), it attempts to save the box again and the ObjectDeletedException is thrown. My question is, how do I get the Box to change its parent Storage without encountering this exception? I know one possible solution is to change the cascade to just all, but then I lose the ability to have NHibernate automatically delete a Box by simply removing it from a Storage and not re-associating it with another one. Or is this the only way to do it and I have to manually call Session.Delete on the box in order to remove it?

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  • Which Oracle table uses a sequence?

    - by Jaú
    Having a sequence, I need to find out which table.column gets its values. As far as I know, Oracle doesn't keep track of this relationship. So, looking up for the sequence in source code would be the only way. Is that right? Anyone knows of some way to find out this sequence-table relationship?

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  • CodePage ID to CodaPage name: GetEncoding equivalent in Delphi?

    - by Steve
    Hello all, I'm looking for a Win32 equivalent of the .Net Encoding.GetEncoding Method to be used in Delphi7. What I would like to achieve is to convert a Codepage ID (ie.: 28592) to a Codapage name (iso-8859-2 in this case). I've found a Win32 function called GetCPInfoEx, but that returns a long CodePage name, and I need the short one, like the ones listed on this page: (see Name column) http://msdn.microsoft.com/en-us/library/system.text.encoding.aspx Thank you!

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  • versioning in Fluent NHibernate

    - by csetzkorn
    In my NHibernate mapping files I used: <version name="Version" column="Version" /> to implement versioning. How do I achieve this using fnhibernate? What should go in here? public class blaMap : IAutoMappingOverride<bla> { public void Override(AutoMapping<bla> mapping) { ???? } } thanks. christian

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  • WPF Inner Property Binding not updating.

    - by Matthew Kruskamp
    I have an INotifyProperty item that I have bound to a wpf control. <local:ScrollingSelector DataContext="{Binding Path=SelectedScreen.VisualizationTypes}" Grid.ColumnSpan="2" Grid.Column="3" Margin="0,0,0,0" Grid.Row="1"/> If I change the SelectedScreen property to a different control the binding still assumes the first control. Why is this? Is there an easy work-around?

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  • get values from table as key value pairs with jquery

    - by liz
    I have a table: <table class="datatable" id="hosprates"> <caption> hospitalization rates test</caption> <thead> <tr> <th scope="col">Funding Source</th> <th scope="col">Alameda County</th> <th scope="col">California</th> </tr> </thead> <tbody> <tr> <th scope="row">Medi-Cal</th> <td>34.3</td> <td>32.3</td> </tr> <tr> <th scope="row">Private</th> <td>32.2</td> <td>34.2</td> </tr> <tr> <th scope="row">Other</th> <td>22.7</td> <td>21.7</td> </tr> </tbody> </table> i want to retrieve column 1 and column 2 values per row as pairs that end up looking like this [funding,number],[funding,number] i did this so far, but when i alert it, it only shows [object, object]... var myfunding = $('#hosprates tbody tr').each(function(){ var funding = new Object(); funding.name = $('#hosprates tbody tr td:nth-child(1)').map(function() { return $(this).text().match(/\S+/)[0]; }).get(); funding.value= $('#hosprates tbody tr td:nth-child(2)').map(function() { return $(this).text().match(/\S+/)[0]; }).get(); }); alert (myfunding);

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  • Fast find near users using PostGIS

    - by opedge
    I have 5 tables: - users - information about user with current location_id (fk to geo_location_data) - geo_location_data - information about location, with PostGIS geography(POINT, 4326) column - user_friends - relationships between users. I want to find near friends for current user, but it takes a lot of time of executing select query to know if user is a friend and after that execute select using ST_DWithin.. May be something wrong in domain model or in queries?

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  • XML security in world wide web

    - by nikky
    Hi, Im a newbie in XML and i have some questions Can XML be used in stead of normal database (store data in a tuple and column) in website? XML is built to share information easier (from my understanding) such as can share cross platform and in different language used so Is it secure to store secure data in XML? thank you so much

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  • TSQL: Variable scope and EXEC()

    - by Joel
    declare @test varchar(20) set @test = 'VALUE' exec(' select '+@test+' ') This returns: Invalid column name 'VALUE'. Is there an alternate method to display the variable value on the select statement?

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  • Compare term to current date in HQL (with .Net)

    - by Jan-Frederik Carl
    Hello, I want to compare a column value to the current date, using HQL. I tried IQuery someQuery = session.CreateQuery(String.Format( @"Select s.Id From InventoryProductStateItem s where s.ValidFrom < current_date()")); This throws the exception "Incorrect syntax near keyword current_date()" Can someone help me?

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  • transforming from 'Y' or 'N' to bit

    - by rap-uvic
    Hello, I have a table which has a column called Direct of type char(1). It's values are either 'Y' or 'N' or NULL. I am creating a view and I want the value to be transformed to either 0 or 1 of type bit. Right now it's of type INT. How do I go about doing this? Following is the code: CASE WHEN Direct = 'Y' THEN (SELECT 1) WHEN Direct <> 'Y' THEN (SELECT 0) END AS DirectDebit

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  • How does this Singleton Web Class persists session data, even though session is not updated in the p

    - by Micah Burnett
    Ok, I've got this singleton-like web class which uses session to maintain state. I initially thought I was going to have to manipulate the session variables on each "set" so that the new values were updated in the session. However I tried using it as-is, and somehow, it remembers state. For example, if run this code on one page: UserContext.Current.User.FirstName = "Micah"; And run this code in a different browser tab, FirstName is displayed correctly: Response.Write(UserContext.Current.User.FirstName); Can someone tell me (prove) how this data is getting persisted in the session? Here is the class: using System; using System.Collections.Generic; using System.Linq; using System.Web; public class UserContext { private UserContext() { } public static UserContext Current { get { if (System.Web.HttpContext.Current.Session["UserContext"] == null) { UserContext uc = new UserContext(); uc.User = new User(); System.Web.HttpContext.Current.Session["UserContext"] = uc; } return (UserContext)System.Web.HttpContext.Current.Session["UserContext"]; } } private string HospitalField; public string Hospital { get { return HospitalField; } set { HospitalField = value; ContractField = null; ModelType = null; } } private string ContractField; public string Contract { get { return ContractField; } set { ContractField = value; ModelType = string.Empty; } } private string ModelTypeField; public string ModelType { get { return ModelTypeField; } set { ModelTypeField = value; } } private User UserField; public User User { get { return UserField; } set { UserField = value; } } public void DoSomething() { } } public class User { public int UserId { get; set; } public string FirstName { get; set; } }

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  • mysql datetime performance

    - by praksant
    Hi, since in mysql datetime field is represented as string (i'm not sure how it works internally), wouldn't be from performance point of view faster to store date as unix timestamp? I don't need to use any mysql native date functions, i'm going for performance of sorting and selecting data. if there was an index for that column, would be difference between int and datetime? Thank you

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  • DataGridViewComboBoxCell inactive item painting

    - by Tired
    Hi All, We're trying to alter the DataGridViewComboBoxCell so that when the user expands the dropdown menu, inactive items are displayed in grey text. I've found out how to do this by creating a new object, which inherits from DataGridViewComboBoxEditingControl. The problem with this, is that I'm not sure how to tell the comboBoxCell, or column, to use this EditingControl, when the user clicks on the cell. Any ideas?

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  • How do I echo $command without breaking the layout

    - by w00t
    Hi. I'm trying to do the following in a bash script: com=`ssh host "ls -lh" ` echo $com It works, but the echo will break the output (instead of getting all lines in a column, I get them all in a row). If I do: ssh host ls -lh in the CLI it will give me the correct output + layout. Any ideas?

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  • MSSQL, varchar data to nvarchar data

    - by Øyvind
    I've got a database with collation Danish_Norwegian_CS_AS and lots of varchar columns. I'd like to convert all this data to unicode, but haven't found a way to convert this data yet. If I've understood correctly, the encoding used is UCS-2 little endian. For example I've got a column containing 'PÃ¥l-Trygve' which is easily converted with C# to 'Pål-Trygve' using Encoding.Default.GetString(Encoding.UTF8.GetBytes("PÃ¥l-Trygve")); Is there a way to do this conversion in the microsoft SQL client?

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  • Upload Excel or CSV file to MySQL with PHP

    - by Tony
    I'm looking to allow users to upload an Excel or CSV file to MySQL for a contact management system. Need to be able to allow users to map their columns so that they are imported into the correct column in the table. Anyone know of a good site or tutorial on this?

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  • Sub-total and total columns

    - by Tass-man
    In Visual Foxpro 9 I am trying to wite an sql with a product "subtotal" column and a report "total" column. The sql code that works is as follows, but when I insert the commented out "Case" code I get errors that seem to increase as I correct the preceeding error. Can any one tell me in which place I should insert the "case" and what is wrong with the code? SELECT qItemSaleLines.ItemID, ; qItems.ItemID, ; qItemSaleLines.SaleID, ; qSales.SaleID, ; qSales.CardRecordID, ; qCustomers.CardRecordID, ; qItems.ItemNumber AS ProdCODE, ; qItems.ItemName AS StkNAME, ; qCustomers.LastName AS CUSTOMER, ; qSales.InvoiceNumber AS SaleINVNo, ; qSales.InvoiceDate AS SaleDATE, ; qItemSaleLines.Quantity AS SaleQTY, ; qItemSaleLines.TaxExclusiveTotal AS SALE, ; qItemSaleLines.CostOfGoodsSoldAmount AS COGS, ; qItemSaleLines.TaxExclusiveTotal - qItemSaleLines.CostOfGoodsSoldAmount AS MARGIN, ; (qItemSaleLines.TaxExclusiveTotal - qItemSaleLines.CostOfGoodsSoldAmount) * / qItemSaleLines.TaxExclusiveTotal AS MPERCENT ; FROM qItemSaleLines, qItems, qSales, qCustomers ; WHERE qSales.CardRecordID = qCustomers.CardRecordID AND qItemSaleLines.SaleID = qSales.SaleID AND ; qItemSaleLines.ItemID = qItems.ItemID AND qSales.InvoiceDate {^2009-06-30} ; ORDER BY qItems.ItemNumber, qSales.InvoiceDate ; *!* (SELECT qItems.ItemID, qItemSaleLines.ItemID, qItemSaleLines.TaxExclusiveTotal, ; *!* CASE WHEN qItems.ItemID = (SELECT TOP 1 qItems.ItemID FROM qItems.ItemID, ; *!* WHERE qItems.ItemID = qItemSaleLines.ItemID, ; *!* ORDER BY qItems.ItemID desc), ; *!* THEN (SELECT SUM(qItemSaleLines.TaxExclusiveTotal) FROM qItemSaleLines.TaxExclusiveTotal,; *!* WHERE qItems.ItemID <= qItemSaleLines.ItemID AND qItems.ItemID = qItemSaleLines.ItemID, ; *!* ELSE ' ' END AS 'PROD-SALE'), ; *!* CASE WHEN qItems.ItemID = (SELECT TOP 1 qItems.ItemID FROM qItems.ItemID, ; *!* ORDER BY qItems.ItemID desc), ; *!* THEN (SELECT SUM(qItemSaleLines.TaxExclusiveTotal) FROM qItemSaleLines.TaxExclusiveTotal, ; *!* ELSE ' ' END AS 'Grand Total') ;

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  • Windows Forms - Report Designer

    - by blu
    Are there solutions available for allowing users to define report layouts within a WinForms app? We are playing with xml, xslt, and Word have some ok results, but are wondering if there are better options. We would like to: Set margins, padding, positioning of elements Declare column based or continuous report elements Does not need to do typesetting

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