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  • SQL Joins on varchar fields timing out

    - by CL4NCY
    Hi, I have a join which deletes rows that match another table but the joining fields have to be a large varchar (250 chars). I know this isn't ideal but I can't think of a better way. Here's my query: DELETE P FROM dbo.FeedPhotos AS P INNER JOIN dbo.ListingPhotos AS P1 ON P.photo = P1.feedImage INNER JOIN dbo.Listings AS L ON P.accountID = L.accountID WHERE P.feedID = @feedID This query is constantly timing out even though there are less than 1000 rows in the ListingPhotos table. Any help would be appreciated.

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  • LINQ to SQL does not update when data has changed in database

    - by aximili
    I have this problem where after a field (say Field3 in table MyTable) is updated on the database, MyTable.Field3 (in C#) is still returning the old value. I suspect there is some caching...? How do I force it to: Read the value from the database? OR Update the value in the MyTable class? Or is there anything I miss? Thank you in advance.

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  • Sql Shorthand For Dates

    - by vigilant
    Is there a way to write a query equivalent to select * from log_table where dt >= 'nov-27-2009' and dt < 'nov-28-2009'; but where you could specify only 1 date and say you want the results for that entire day until the next one. I'm just making this up, but something of the form: select * from log_table where dt = 'nov-27-2009':+1;

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  • Why better isolation level means better performance in MS SQL Server

    - by Oleg Zhylin
    When measuring performance on my query I came up with a dependency between isolation level and elapsed time that was surprising to me READUNCOMMITTED - 409024 READCOMMITTED - 368021 REPEATABLEREAD - 358019 SERIALIZABLE - 348019 Left column is table hint, and the right column is elapsed time in microseconds (sys.dm_exec_query_stats.total_elapsed_time). Why better isolation level gives better performance? This is a development machine and no concurrency whatsoever happens. I would expect READUNCOMMITTED to be the fasted due to less locking overhead.

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  • SQL Join Problem

    - by Harley
    Table one contains ID|Name 1 Mary 2 John Table two contains ID|Color 1 Red 1 Blue 2 Green 2 Blue 2 Black I want to end up with is ID|Name|Red|Blue|Green|Black 1 Mary    Y      Y 2 John            Y        Y       Y Thanks for and help.

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  • Adjust SQL query to DB2

    - by Guy Roth
    Part of a complex query that our app is running contains the lines: ...(inner query) SELECT ... NULL as column_A, NULL as column_B, ... FROM ... This syntax of creating columns with null values is not allowed in DB2 altough it is totally OK in MSSQL and Oracle DBs. Technically I can change it to: '' as column_A, '' as column_B, But this doesn't have exactly the same meaning and can damage our calculation results. How can I create columns with null values in DB2 using other syntax??

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  • .NET and Closing SQL Server connections

    - by user307076
    I am having a hard time figuring out why the following constructor will not close connnections. When I view the active connections. Here is the code that I have. Public Sub New(ByVal UserID As Integer) Dim oConn As New SqlConnection(ConfigurationManager.ConnectionStrings("connStr").ToString()) Dim cmd As New SqlCommand("stored proc", oConn) Dim sdr As SqlDataReader cmd.CommandType = CommandType.StoredProcedure cmd.Parameters.AddWithValue("@userID", UserID) oConn.Open() sdr = cmd.ExecuteReader() Try If Not sdr.HasRows Then sdr.Close() If Not oConn Is Nothing Then If oConn.State <> ConnectionState.Closed Then oConn.Close() End If End If cmd.Dispose() Exit Sub End If 'User has account in WATS, proceed to load account information While sdr.Read _firstname = Convert.ToString(sdr("First Name")) _lastname = Convert.ToString(sdr("Last Name")) End While Catch ex As Exception 'Throw New Exception("User Error: " + ex.Message) Finally sdr.Close() If Not oConn Is Nothing Then If oConn.State <> ConnectionState.Closed Then oConn.Close() End If End If cmd.Dispose() End Try End Sub

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  • linq-to-sql combine child expressions

    - by VictorS
    I need to create and combine several expressions for child entity into one to use it on "Any" operator of a parent. Code now looks like this: Expresion<Child, bool> startDateExpression = t => t.start_date >= startDate; Expression<Child, bool> endDateExpression = t => t.end_date <= endDate; .... ParameterExpression param = startDateExpression.Parameters[0]; Expression<Func<T, bool>> Combined = Expression.Lambda<Func<Child, bool>>( Expression.AndAlso(startDateExpression.Body, startDateExpression.Body), param); //but now I am trying to use combined expression on parent //this line fails just to give an idea on what I am trying to do: //filter type is IQueryable<Parent>; var filter = filter.Where(p =>p.Children.Any(Combined)); How can I do that? Is there better(more elegant way way of doing it?

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  • SQL Server SELECT stored procedure according to combobox.selectedvalue

    - by Jay
    In order to fill a datagridview according to the selectedvalue of a combobox I've tried creating a stored procedure. However, as I'm not 100% sure what I'm doing, depending on the WHERE statement at the end of my stored procedure, it either returns everything within the table or nothing at all. This is what's in my class: Public Function GetAankoopDetails(ByRef DisplayMember As String, ByRef ValueMember As String) As DataTable DisplayMember = "AankoopDetailsID" ValueMember = "AankoopDetailsID" If DS.Tables.Count > 0 Then DS.Tables.Remove(DT) End If DT = DAC.ExecuteDataTable(My.Resources.S_AankoopDetails, _Result, _ DAC.Parameter(Const_AankoopID, AankoopID), _ DAC.Parameter("@ReturnValue", 0)) DS.Tables.Add(DT) Return DT End Function Public Function GetAankoopDetails() As DataTable If DS.Tables.Count > 0 Then DS.Tables.Remove(DT) End If DT = DAC.ExecuteDataTable(My.Resources.S_AankoopDetails, _Result, _ DAC.Parameter(Const_AankoopID, AankoopID), _ DAC.Parameter("@ReturnValue", 0)) DS.Tables.Add(DT) Return DT End Function This is the function in the code behind the form I've written in order to fill the datagridview: Private Sub GridAankoopDetails_Fill() Try Me.Cursor = Cursors.WaitCursor dgvAankoopDetails.DataSource = Nothing _clsAankoopDetails.AankoopDetailsID = cboKeuze.SelectedValue dgvAankoopDetails.DataSource = _clsAankoopDetails.GetAankoopDetails Catch ex As Exception MessageBox.Show("An error occurred while trying to fill the data grid: " & ex.Message, "Oops!", MessageBoxButtons.OK) Finally Me.Cursor = Cursors.Default End Try End Sub And finally, this is my stored procedure: (do note that I'm not sure what I'm doing here) USE [Budget] GO /****** Object: StoredProcedure [dbo].[S_AankoopDetails] Script Date: 04/12/2010 03:10:52 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO ALTER PROCEDURE [dbo].[S_AankoopDetails] ( @AankoopID int, @ReturnValue int output ) AS declare @Value int set @Value =@@rowcount if @Value = 0 begin SELECT dbo.tblAankoopDetails.AankoopDetailsID, dbo.tblAankoopDetails.AankoopID, dbo.tblAankoopDetails.ArtikelID, dbo.tblAankoopDetails.Aantal, dbo.tblAankoopDetails.Prijs, dbo.tblAankoopDetails.Korting, dbo.tblAankoopDetails.SoortKorting, dbo.tblAankoopDetails.UitgavenDeelGroepID FROM dbo.tblAankoopDetails INNER JOIN dbo.tblAankoop ON dbo.tblAankoopDetails.AankoopID = dbo.tblAankoop.AankoopID INNER JOIN dbo.tblArtikel ON dbo.tblAankoopDetails.ArtikelID = dbo.tblArtikel.ArtikelID INNER JOIN dbo.tblUitgavenDeelGroep ON dbo.tblAankoopDetails.UitgavenDeelGroepID = dbo.tblUitgavenDeelGroep.UitgavenDeelGroepID WHERE dbo.tblAankoopDetails.Deleted = 0 and dbo.tblAankoopDetails.AankoopID = @AankoopID ORDER BY AankoopID if @@rowcount >0 begin set @ReturnValue=999 end else begin set @ReturnValue=997 end end if @Value >0 begin --Dit wil zeggen dat ik een gebruiker wil ingeven die reeds bestaat. (998) set @ReturnValue=998 end Does anyone know what I need to do to resolve this?

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  • SQL 2008: Using separate tables for each datatype to return single row

    - by Thomas C
    Hi all I thought I'd be flexible this time around and let the users decide what contact information the wish to store in their database. In theory it would look as a single row containing, for instance; name, adress, zipcode, Category X, Listitems A. Example FieldType table defining the datatypes available to a user: FieldTypeID, FieldTypeName, TableName 1,"Integer","tblContactInt" 2,"String50","tblContactStr50" ... A user the define his fields in the FieldDefinition table: FieldDefinitionID, FieldTypeID, FieldDefinitionName 11,2,"Name" 12,2,"Adress" 13,1,"Age" Finally we store the actual contact data in separate tables depending on its datatype. Master table, only contains the ContactID tblContact: ContactID 21 22 tblContactStr50: ContactStr50ID,ContactID,FieldDefinitionID,ContactStr50Value 31,21,11,"Person A" 32,21,12,"Adress of person A" 33,22,11,"Person B" tblContactInt: ContactIntID,ContactID,FieldDefinitionID,ContactIntValue 41,22,13,27 Question: Is it possible to return the content of these tables in two rows like this: ContactID,Name,Adress,Age 21,"Person A","Adress of person A",NULL 22,"Person B",NULL,27 I have looked into using the COALESCE and Temp tables, wondering if this is at all possible. Even if it is: maybe I'm only adding complexity whilst sacrificing performance for benefit in datastorage and user definition option. What do you think? Best Regards /Thomas C

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  • Data validate tools (ETL tools) for SQL server

    - by Stan
    I have some data in Excel and need to import into database. Is there any tool that can validate and maybe clean the data? Does Red Gate have such tool? The input will be Excel. Given table constraints, eg. CHECK, UNIQUE KEY, datetime format, NOT NULL. Desire output should be as least shows which lines are having problems, and then fix some trivial error automatically, like fill in default value for NULL columns, automatically correct datetime format. I know using Python can build such a script. But just wonder what's the popular way to do this. Thanks.

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  • Linq to SQL ordered child collection

    - by Matt Connolly
    Is there a way to define a default order column from a child collection? In my case, I have a Form entity that has a collection of FormItem entities called FormItems. FormItem has a property called DisplayOrder (int). I want to make sure that any Form entities I return from a method have that collection properly ordered. Is there a way to do this before returning the result? For example, I tried this but the list is not actually sorted: var form = context.Forms.FirstOrDefault(x => x.IsDeleted == false && x.FormName == formName); if (form != null) { form.FormItems.OrderBy(x => x.DisplayOrder); // I can't even figure out a way to cast this next line so that it will compile // form.FormItems = form.FormItems.OrderBy(x => x.DisplayOrder); } return form; Is there a way to do this without using DataLoadOptions?

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  • Linq sql Attach, Update Check set to Never, but still Concurrency conflicts

    - by remdao
    In the dbml designer I've set Update Check to Never on all properties. But i still get an exception when doing Attach: "An attempt has been made to Attach or Add an entity that is not new, perhaps having been loaded from another DataContext. This is not supported." This approach seems to have worked for others on here, but there must be something I've missed. using(TheDataContext dc = new TheDataContext()) { test = dc.Members.FirstOrDefault(m => m.fltId == 1); } test.Name = "test2"; using(TheDataContext dc = new TheDataContext()) { dc.Members.Attach(test, true); dc.SubmitChanges(); }

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  • SQL housekeeping tasks on Herkoku

    - by Chris Beeson
    Hi, I'm not sure how to do this... I have a database which contains a messages and categories tables. The categories table has a field which has a count of the number of messages related to it. Sometimes however I need to deactivate (active = 0) a message, at the moment this doesn't then update the category table... I will implement this is in the end but for the time I would just like to run a script perhaps daily that goes through all the categories, counts up the messages and updates the field. What the best way of doing this? Thanks in advance Chris

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  • sql-server: how to insert to temporary table?

    - by RedsDevils
    I have one Temporary Table CREATE TABLE #TEMP (TEMP_ID INT IDENTITY(1,1)) And I would like to insert records to that table, How can I?I do as follow: INSERT INTO #TEMP DEFAULT VALUES But sometimes it doesn't work. What it might be?And I would like to know lifetime of temptable in MSSQL. Please Help me! Thanks all!

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  • pl/sql object types "ORA-06530: Reference to uninitialized composite" error

    - by mutoss
    hi, i have a type as follows: CREATE OR REPLACE TYPE tbusiness_inter_item_bag AS OBJECT ( item_id NUMBER, system_event_cd VARCHAR2 (20), CONSTRUCTOR FUNCTION tbusiness_inter_item_bag RETURN SELF AS RESULT ); CREATE OR REPLACE TYPE BODY tbusiness_inter_item_bag AS CONSTRUCTOR FUNCTION tbusiness_inter_item_bag RETURN SELF AS RESULT AS BEGIN RETURN; END; END; when i execute the following script, i got a "Reference to uninitialized composite" error, which is imho quite suitable. DECLARE item tbusiness_inter_item_bag; BEGIN item.system_event_cd := 'ABC'; END; This also raises the same error: item.item_id := 3; But if i change my object type into: CREATE OR REPLACE TYPE tbusiness_inter_item_bag AS OBJECT ( item_id NUMBER(1), system_event_cd VARCHAR2 (20), CONSTRUCTOR FUNCTION tbusiness_inter_item_bag RETURN SELF AS RESULT ); then the last statement raises no more error (where my "item" is still uninitialized): item.item_id := 3; Shouldn't i get the same ORA-06530 error? ps: Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi

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  • How to refactor this database to allow sync. with smart clients?

    - by Anton Zvgny
    Howdy, I have inherited the following database: http://i46.tinypic.com/einvjr.png (EDIT: I cannot post images, so here goes the link) This currently runs 100% online thru an Asp.Net web app , but some employees will need to have offline access to this database to either get documents or to insert new documents for later synchronization when back to the office. What changes need to be made to this database scheme to support such scenario (sync smart clients with central web database)? Thanks! ps. I'm not an developer/dba, i'm just an mechanic engineer tasked with changing this app, so, take it easy on me :D ps1. We're using MSSQL Server for the online central database and MSSQL Compact for the smart client. ps2. the ImageGuid field of the images table is used to save the images to the file system. The web app takes the guid and create folders according to the first 3 initial letters to persist the image to the file system. ps3. The users of the smart client not always get server data first and then go modifying to sync later the changes. Most of the time they start working completely offline (with a blank local database) and later sync the data to the server. ps4. All the users of the smart client app have an account at the web app.

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  • sql server optional parameters: syntax for between clause

    - by Aseem Gautam
    @FromDate datetime = null @ToDate datetime = null SELECT * FROM TABLE WHERE .... AND [PI].Date BETWEEN @FromDate AND @ToDate When any date is null, the records are not displayed. What is the correct syntax so that I can get all records if any of the dates are null. I have thought of this: @FromDate datetime = '01/01/1901', @ToDate datetime = '12/31/9999' Thanks.

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  • How to create nonclustered index in Create Table.

    - by isthatacode
    Create table FavoriteDish ( FavID int identity (1,1) primary key not null, DishID int references Dishes(DishID) not null , CelebrityName nvarchar(100) nonclustered not null ) This results in - Incorrect syntax near the keyword 'nonclustered'. I referred the MSDN help for create table syntax. I am not sure whats wrong here? Thanks for reading.

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  • Disable all non-clustered indexes

    - by spender
    I select a number of non-clustered indexes from my database with the following: SELECT sys.objects.name tableName, sys.indexes.name indexName FROM sys.indexes JOIN sys.objects ON sys.indexes.object_id = sys.objects.object_id WHERE sys.indexes.type_desc = 'NONCLUSTERED' AND sys.objects.type_desc = 'USER_TABLE' I'd like to run the following over each of the results: ALTER INDEX indexName ON tableName DISABLE How would I go about doing this? Is there a better way?

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  • What should I do with syncobj in SQL Server

    - by hgulyan
    Hi. I run this script to search particular text in sys.columns and I get a lot of "dbo.syncobj_0x3934443438443332" this kind of result. SELECT c.name, s.name + '.' + o.name FROM sys.columns c INNER JOIN sys.objects o ON c.object_id=o.object_id INNER JOIN sys.schemas s ON o.schema_id=s.schema_id WHERE c.name LIKE '%text%' If I get it right, they are replication objects. Is it so? Can i just throw them away from my query just like o.name NOT LIKE '%syncobj%' or there's another way? Thank you.

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