Looking To Tune Query...

Sep 15, 2006

If anyone is able to provide advice for tuning the below query in sql
server, it is much appreciated. In addition any index suggestions are
also appreciated as I have access to the tables. Thank you.

select a.id, isnull(b.advisement_satisfaction_yes, 0) as
advisement_satisfaction_yes,
isnull(c.advisement_satisfaction_no, 0) as advisement_satisfaction_no,
case
when isnull(b.advisement_satisfaction_yes, 0) >
isnull(c.advisement_satisfaction_no, 0) then 'YES'
when isnull(b.advisement_satisfaction_yes, 0) <
isnull(c.advisement_satisfaction_no, 0) then 'NO'
when isnull(b.advisement_satisfaction_yes, 0) =
isnull(c.advisement_satisfaction_no, 0) then 'TIE'
end as Satisfied_With_Advisement

from a
left Join

(select id, count(answer_text) as Advisement_Satisfaction_yes from a
where question = 'The level of Academic Advisement I received from the
University staff during this course was appropriate.'
and answer_text = 'yes'
GROUP BY id) b

on a.id = b.id

left join

(select id, count(answer_text) as Advisement_Satisfaction_NO from a
where question = 'The level of Academic Advisement I received from the
University staff during this course was appropriate.'
and answer_text = 'NO'
GROUP BY id) c

on a.id = b.id

where question = 'The level of Academic Advisement I received from the
University staff during this course was appropriate.'

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How To Tune My Query

Sep 21, 2005

I have written a query which fetches data from a table with huge amount of data. This query is actually being used in a stored-procedure and it takes a lot of time, hence slows down my SP.

Here is the query that I'm builiding in the stored-procedure:
-------------------------------------------------------------
SET @selectLeadsInPeriodString = ' SELECT LM_Dealer, LM_Brand, SUM(LM_ImpressionCount)
FROM LM_ImpressionCount_Dealer'
IF(@timeCriterion IS NULL OR LTRIM(RTRIM(@timeCriterion)) = '' OR LTRIM(RTRIM(@timeCriterion)) = 'NULL')
SET @selectLeadsInPeriodString = @selectLeadsInPeriodString +
' WHERE (CONVERT(varchar,[LM_ImpressionCount_Dealer].[LM_ImpressionDate],102) >= ''' +
CONVERT(varchar,@startDateTime,102) +
''' AND CONVERT(varchar,[LM_ImpressionCount_Dealer].[LM_ImpressionDate],102) <= ''' +
CONVERT(varchar,@endDateTime,102) + ''')'
ELSE IF(@timeCriterion = 'CurrentMonth')
SET @selectLeadsInPeriodString = @selectLeadsInPeriodString +
' WHERE MONTH([LM_ImpressionCount_Dealer].[LM_ImpressionDate]) = MONTH(GETDATE())'
ELSE IF(@timeCriterion = 'PreviousMonth')
SET @selectLeadsInPeriodString = @selectLeadsInPeriodString +
' WHERE MONTH([LM_ImpressionCount_Dealer].[LM_ImpressionDate]) = MONTH(GETDATE()) - 1'
ELSE IF(@timeCriterion = 'YearToDate')
SET @selectLeadsInPeriodString = @selectLeadsInPeriodString +
' WHERE ([LM_ImpressionCount_Dealer].[LM_ImpressionDate] >= cast((''1/1/''+cast(year(getdate()) AS varchar(4))) AS datetime)
AND CONVERT(varchar,[LM_ImpressionCount_Dealer].[LM_ImpressionDate],102) <= CONVERT(varchar,GETDATE(),102))'

IF(@brand IS NOT NULL AND LTRIM(RTRIM(@brand)) <> '')
SET @selectLeadsInPeriodString = @selectLeadsInPeriodString +
' AND [LM_ImpressionCount_Dealer].[LM_Brand] = ''' + @brand + ''''

SET @selectLeadsInPeriodString = @selectLeadsInPeriodString + ' GROUP BY LM_Dealer, LM_Brand'

The variables used in the query formation above are passed as input parameters to the SP.
The table being queried has columns 'LM_Dealer', 'LM_Brand', 'LM_ImpressionCount' and 'LM_ImpressionDate'.
Also, the table has a non-clustered index on the column LM_ImpressionDate.

With all this information, can anyone suggest as to how I can optimize the query above.

Thanks in advance.

-Dex

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How To Tune Query??

Sep 30, 2005

I think this is very silly question
but It is hard for me :eek:

SELECT email, host FROM WAITING_AUTH WHERE email NOT IN
(SELECT email FROM MEMBER)
AND host NOT IN (SELECT host FROM MEMBER)

thanks~ Have a nice weekend

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Apr 24, 2008

Hi,
I have a query as mentioned below:

SELECT BillCurrencyID,DistD,Amount,PartnerFlag1
FROM Factsales_tab_Dtls (NOLOCK)
WHERE (sales_year =2007 OR sales_year=2008)
AND Country ='US'

1) Table Factsales_tab_Dtls is having more than 5.5 million of records.

2) It is having 32 columns.

3)There's nonclusetered index on columns sales_year & country
4)The query takes longer time for execution

Please help me fine-tune the query

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Feb 6, 2006

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hi here has a question for the mssql,

a problem occurs when i run a large database, the running speed is very slow.

for example, if i want to seek the record of 1500 employees with 15 per person(average) within 1 year(12 months), that mean i have to find record for 1500 * 15 * 12 time.

so, could i find a way to solve this problem? is this call tune the sql server/index/view?

what different of tune the sql server with index and view?

thanks for giving me advice.

:)

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Hi,

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Any tips regarding how I can tune things up? What should I look for and how do I go about it. Deleting LOG etc. etc???

Please guide.

Thanks.

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Mar 23, 1999

ENVIRONMENT:
I have SQL Server6.5 running under a dedicated NT Server. NT configuration includes dual pentium 200Mhz processors, 256MB RAM and RAID system.
The Database size is 1GB with actual data size about 500MB.

PROBLEM:
I have an application which uses lots of joins to get the results. My select query is running too slow even when I run it on the server.

I updated the statistics and rebuild all the indexes on the tables used by the query.

Any suggestions on using SQL Trace and tuning the server/database are welcome.

Srini

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Apr 18, 2002

How can l trim the code and make the procedure run faster ???????????????

CREATE Procedure Disbursements_Cats
(@startdate datetime,@enddate datetime)
As
Begin
SELECT Transaction_Record.loan_No AS loan_no,
Transaction_Record.transaction_Date AS Transaction_Date,
Transaction_Record.transaction_type AS Transaction_type,
Transaction_Record.transaction_Amount AS Transaction_Amount,

Product.product AS Product,
Product_Type.product_Type AS product_type,
Product_Type.loan_Type AS Loan_type,

Customer.first_name AS first_name,
Customer.initials AS initials,
Customer.second_name AS Second_Name,
Customer.surname AS surname,
Customer_identification.idno AS ID_No,

Bank.Bank_name AS Bank_Name,
Bank_detail.Account_no AS Account,
Bank_detail.Branch AS Branch

FROM Transaction_Record CROSS JOIN
Bank_detail CROSS JOIN Bank CROSS JOIN
Customer CROSS JOIN Product CROSS JOIN
Loan_Type CROSS JOIN Product_Type CROSS JOIN Customer_identification
End;
GO

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Hello,

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Thanks
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Apr 18, 2008



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For example, we have a table, tblSecret, and the view, vwSecret, is,

SELECT

Id,
ParentId,
Description,
SecretData
FROM tblSecret
WHERE udfExpensiveApiCall(Id) = 1

The udfExpensiveApiCall will return 1 if the current user is allowed to access the SecretData else 0. The CLR UDF call is very expensive in terms of execution time and resources required.

Currently, there are millions rows in the tblSecret.

My objective is to tune the view such that when the view is JOINed, the udfExpensiveApiCall will be called the least number of time.


SELECT

ParentId,
SecertData
FROM vwParent
LEFT JOIN vwSecret ON vwSecret.ParentId = vwParent.ParentId
WHERE vwParent.StartDate > '1/1/2008'

AND vwSecret.Description LIKE '%WHATEVER%'

Is there any way to specify the execution cost of the CLR UDF, udfExpensiveApiCall, such that the execution plan will call the UDF while it is absolutely necessary?

Is there any query hint will help?

Any recommendation?

Thanks,
Simon Chan

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any one have any good idea(s)? please share to us here


:)

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Thanks in advance.

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i have a report that runs on a huge table rpt.AgentMeasures  , it has 10 months worth of data (150 million records as of today and will keep increasing).  i have pasted my proc below , the other tables that are joined to this huge table do not have more then 3k records.This report will be accessed by multiple users (expecting 20 ppl). as of now this reports runs for 5 mins if i pull for 1 month worth of data. if it is wise to use temp tables.

ALTER proc [rpt].[Get_Metrics]
@MinDate DATETIME,
@MaxDate DATETIME,
@Medium Varchar(max),
@footPrint varchar(max),

[code]...

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Dec 19, 2003

I'm running a query, actually its an insert that works when using the TSQL below.

However when I try to use the debugger to step through and using the exact same values as those below I get the following error:

[Microsoft][ODBC SQL Server Driver]Invalid character value for cast specification

Its Killing me because everything else works, but this. Can somebody help.


DECLARE @NoteID INT,-- NULL OUTPUT,
@Note_Description NVARCHAR(3000),-- = NULL,
@Date DateTime,-- = NULL OUTPUT,
@ByWho NVARCHAR(30),-- = NULL,
@FK_Action_Performed NVARCHAR(40),-- = NULL,
@FK_UserID INT,-- = NULL,
@FK_JobID INT,-- = NULL,
@Job_Date DateTime,-- = NULL,
@Start DateTime,-- = NULL,
@Finish DateTime,-- = NULL,

@BeenRead NVARCHAR(10),-- = NULL

@FK_UserIDList NVARCHAR(4000)-- = NULL


--SET @NoteID = 409 --NULL OUTPUT,
SET @Note_Description = 'Tetsing'
--SET @Date DateTime = NULL OUTPUT,
SET @ByWho = 'GeorgeAgaian'
SET @FK_Action_Performed = 'Worked hard'
SET @FK_UserID = 5
SET @FK_JobID = 29
SET @Job_Date = 28/01/03
SET @Start = '1:00:20 PM'
SET @Finish = '1:00:20 PM'
SET @BeenRead = 'UnRead'

SET @FK_UserIDList = '1,2,3'


--AS

--SET NOCOUNT ON


SET NOCOUNT ON

SET XACT_ABORT ON

BEGIN TRANSACTION

SET @Date = GETDATE()

-- Insert Values into the customer table
INSERT Note (Note_Description,
Date,
ByWho,
FK_Action_Performed,
FK_UserID,
FK_JobID,
Job_Date,
Start,
Finish)

SELECT --@NoteID,
@Note_Description,
@Date,
@ByWho,
@FK_Action_Performed,
@FK_UserID,
@FK_JobID,

@Job_Date,
@Start,
@Finish

-- Get the new Customer Identifier, return as OUTPUT param
SELECT @NoteID = @@IDENTITY


-- Insert new notes for all the users that the note pertains to, in this case this will be by the assigned
-- users.
IF @FK_UserIDList IS NOT NULL
EXECUTE spInsertNotesByAssignedUsers @NoteID, @FK_UserIDList

-- Insert New Address record
-- Retrieve Address reference into @AddressId
-- EXEC spInsertForUserNote
-- @FK_UserID,
--@NoteID,
-- @BeenRead
-- @Fax,
-- @PKId,
-- @AddressId OUTPUT

COMMIT TRANSACTION

--------------------------------------------------
GO

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FROM testsupplierSCNCR
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but in query analizer I get the result of

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May 24, 2007

SQL Server 2005 9.0.3161 on Win 2k3 R2



I receive the following error:



"Error: 8624, Severity: 16, State: 1 Internal Query Processor Error: The query processor could not produce a query plan. For more information, contact Customer Support Services."



I have traced this to an insert statement that executes as part of a stored procedure.



INSERT INTO ledger (journal__id, account__id,account_recv_info__id,amount)

VALUES (@journal_id, @acct_id, @acct_recv_id, @amount)



There is also an auto-increment column called id. There are FK contraints on all of the columns ending in "__id". I have found that if I remove the contraint on account__id the procedure will execute without error. None of the other constraints seem to make a difference. Of course I don't want to remove this key because it is important to the database integrity and should not be causing problems, but apparently it confuses the optimizer.



Also, the strange thing is that I can get the procedure to execute without error when I run it directly through management studio, but I receive the error when executing from .NET code or anything using ODBC (Access).

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Mar 28, 2007

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dbo.DERIVATIVES ON dbo.MODELS.MODEL_ID = dbo.DERIVATIVES.MODEL_ID INNER JOIN
dbo.[VALUES] ON dbo.DERIVATIVES.DERIVATIVE_ID = dbo.[VALUES].DERIVATIVE_ID INNER JOIN
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CASE WHEN @VAL3 IS NOT NULL THEN 1 ELSE 0 END +
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ORDER BY count(*) DESC

 Here is the page source
 
<%@ Page Language="VB" MasterPageFile="~/MasterPage.master" Title="Untitled Page" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:DevConnectionString1 %>"
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<SelectParameters>
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<asp:ControlParameter ControlID="TextBox1" Name="VAL1" PropertyName="Text" />
<asp:Parameter Name="ATT_ID2" />
<asp:Parameter Name="VAL2" />
<asp:Parameter Name="ATT_ID3" />
<asp:Parameter Name="VAL3" />
<asp:Parameter Name="ATT_ID4" />
<asp:Parameter Name="VAL4" />
</SelectParameters>
</asp:SqlDataSource>
<asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="<%$ ConnectionStrings:DevConnectionString1 %>"
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<br />
<asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="SqlDataSource2"
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</asp:DropDownList>
<asp:TextBox ID="TextBox1" runat="server" AutoPostBack="True"></asp:TextBox><br />
<br />
<br />
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="DERIVATIVE_ID"
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<Columns>
<asp:BoundField DataField="DERIVATIVE_ID" HeaderText="DERIVATIVE_ID" InsertVisible="False"
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<asp:BoundField DataField="Matches" HeaderText="Matches" ReadOnly="True" SortExpression="Matches" />
</Columns>
</asp:GridView>
</asp:Content>
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(Visual Web Devleoper 2005 Express and SQL Server Management Studio Express)
 

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• We are using the last version of Excel Add-in

• We try to reinstall the MDS feature

• If I backup/restore MDS database to other server it works

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===================================
Sequence contains no elements
------------------------------
Program Location:
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   at Microsoft.MasterDataServices.ExcelAddInCore.AsyncProviderBase`1.EndOperation(IAsyncResult ar)

[code]....

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set nocount on
go
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if object_id('tempdb.dbo

[code]....

This succeeds when the invalid column name is a valid column name in the outer query. So in this situation the sub-query would fail when run by itself but succeed with an incorrectly applied filter when run as a sub-query. The danger here is that if a SQL Server user runs DML in a production database with such a sub-query which then the results are likely not the expected results with potentially unintended actions applied against the data. how many SQL Server users have had incorrectly applied DML or incorrect query results and don't even know it....?

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Hello everybody,



I'm developing a report using the following structure :



declare @sql as nvarchar(4000)

declare @where as nvarchar(2000)



set @sql = 'select ....'



If <conditional1>

begin

set @where = 'some where'

end



If <conditional2>

begin

set @where = 'some where'

end



set @sql = @sql + @where



exec(@sql)



I run it in query analyser and works fine, but when I try to run in Reporting Services, Visual studio stops responding and the cpu reaches 100 %.



I realize that when I cut off the if clauses, then it works at Reporting services.

Does anybody know what is happening?

Why the query works in query analyser and doesn't work in Reporting Service ?



Thanks,



Maurício

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I want my output to be

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FROM...
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Mar 25, 2008

Hi all,
In the Programmability/Stored Procedure of Northwind Database in my SQL Server Management Studio Express (SSMSE), I have the following sql:


USE [Northwind]

GO

/****** Object: StoredProcedure [dbo].[SalesByCategory] Script Date: 03/25/2008 08:31:09 ******/

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

CREATE PROCEDURE [dbo].[SalesByCategory]

@CategoryName nvarchar(15), @OrdYear nvarchar(4) = '1998'

AS

IF @OrdYear != '1996' AND @OrdYear != '1997' AND @OrdYear != '1998'

BEGIN

SELECT @OrdYear = '1998'

END

SELECT ProductName,

TotalPurchase=ROUND(SUM(CONVERT(decimal(14,2), OD.Quantity * (1-OD.Discount) * OD.UnitPrice)), 0)

FROM [Order Details] OD, Orders O, Products P, Categories C

WHERE OD.OrderID = O.OrderID

AND OD.ProductID = P.ProductID

AND P.CategoryID = C.CategoryID

AND C.CategoryName = @CategoryName

AND SUBSTRING(CONVERT(nvarchar(22), O.OrderDate, 111), 1, 4) = @OrdYear

GROUP BY ProductName

ORDER BY ProductName

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
From an ADO.NET 2.0 book, I copied the code of ConnectionPoolingForm to my VB 2005 Express. The following is part of the code:

Imports System.Collections.Generic

Imports System.ComponentModel

Imports System.Drawing

Imports System.Text

Imports System.Windows.Forms

Imports System.Data

Imports System.Data.SqlClient

Imports System.Data.Common

Imports System.Diagnostics

Public Class ConnectionPoolingForm

Dim _ProviderFactory As DbProviderFactory = SqlClientFactory.Instance

Public Sub New()

' This call is required by the Windows Form Designer.

InitializeComponent()

' Add any initialization after the InitializeComponent() call.

'Force app to be available for SqlClient perf counting

Using cn As New SqlConnection()

End Using

InitializeMinSize()

InitializePerfCounters()

End Sub

Sub InitializeMinSize()

Me.MinimumSize = Me.Size

End Sub

Dim _SelectedConnection As DbConnection = Nothing

Sub lstConnections_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) Handles lstConnections.SelectedIndexChanged

_SelectedConnection = DirectCast(lstConnections.SelectedItem, DbConnection)

EnableOrDisableButtons(_SelectedConnection)

End Sub

Sub DisableAllButtons()

btnAdd.Enabled = False

btnOpen.Enabled = False

btnQuery.Enabled = False

btnClose.Enabled = False

btnRemove.Enabled = False

btnClearPool.Enabled = False

btnClearAllPools.Enabled = False

End Sub

Sub EnableOrDisableButtons(ByVal cn As DbConnection)

btnAdd.Enabled = True

If cn Is Nothing Then

btnOpen.Enabled = False

btnQuery.Enabled = False

btnClose.Enabled = False

btnRemove.Enabled = False

btnClearPool.Enabled = False

Else

Dim connectionState As ConnectionState = cn.State

btnOpen.Enabled = (connectionState = connectionState.Closed)

btnQuery.Enabled = (connectionState = connectionState.Open)

btnClose.Enabled = btnQuery.Enabled

btnRemove.Enabled = True

If Not (TryCast(cn, SqlConnection) Is Nothing) Then

btnClearPool.Enabled = True

End If

End If

btnClearAllPools.Enabled = True

End Sub

Sub StartWaitUI()

Me.Cursor = Cursors.WaitCursor

DisableAllButtons()

End Sub

Sub EndWaitUI()

Me.Cursor = Cursors.Default

EnableOrDisableButtons(_SelectedConnection)

End Sub

Sub SetStatus(ByVal NewStatus As String)

RefreshPerfCounters()

Me.statusStrip.Items(0).Text = NewStatus

End Sub

Sub btnConnectionString_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnConnectionString.Click

Dim strConn As String = txtConnectionString.Text

Dim bldr As DbConnectionStringBuilder = _ProviderFactory.CreateConnectionStringBuilder()

Try

bldr.ConnectionString = strConn

Catch ex As Exception

MessageBox.Show(ex.Message, "Invalid connection string for " + bldr.GetType().Name, MessageBoxButtons.OK, MessageBoxIcon.Error)

Return

End Try

Dim dlg As New ConnectionStringBuilderDialog()

If dlg.EditConnectionString(_ProviderFactory, bldr) = System.Windows.Forms.DialogResult.OK Then

txtConnectionString.Text = dlg.ConnectionString

SetStatus("Ready")

Else

SetStatus("Operation cancelled")

End If

End Sub

Sub btnAdd_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnAdd.Click

Dim blnError As Boolean = False

Dim strErrorMessage As String = ""

Dim strErrorCaption As String = "Connection attempt failed"

StartWaitUI()

Try

Dim cn As DbConnection = _ProviderFactory.CreateConnection()

cn.ConnectionString = txtConnectionString.Text

cn.Open()

lstConnections.SelectedIndex = lstConnections.Items.Add(cn)

Catch ex As Exception

blnError = True

strErrorMessage = ex.Message

End Try

EndWaitUI()

If blnError Then

SetStatus(strErrorCaption)

MessageBox.Show(strErrorMessage, strErrorCaption, MessageBoxButtons.OK, MessageBoxIcon.Error)

Else

SetStatus("Connection opened succesfully")

End If

End Sub

Sub btnOpen_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnOpen.Click

StartWaitUI()

Try

_SelectedConnection.Open()

EnableOrDisableButtons(_SelectedConnection)

SetStatus("Connection opened succesfully")

EndWaitUI()

Catch ex As Exception

EndWaitUI()

Dim strErrorCaption As String = "Connection attempt failed"

SetStatus(strErrorCaption)

MessageBox.Show(ex.Message, strErrorCaption, MessageBoxButtons.OK, MessageBoxIcon.Error)

End Try

End Sub

Sub btnQuery_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnQuery.Click

Dim queryDialog As New QueryDialog()

If queryDialog.ShowDialog() = System.Windows.Forms.DialogResult.OK Then

Me.Cursor = Cursors.WaitCursor

DisableAllButtons()

Try

Dim cmd As DbCommand = _SelectedConnection.CreateCommand()

cmd.CommandText = queryDialog.txtQuery.Text

Using rdr As DbDataReader = cmd.ExecuteReader()

If rdr.HasRows Then

Dim resultsForm As New QueryResultsForm()

resultsForm.ShowResults(cmd.CommandText, rdr)

SetStatus(String.Format("Query returned {0} row(s)", resultsForm.RowsReturned))

Else

SetStatus(String.Format("Query affected {0} row(s)", rdr.RecordsAffected))

End If

Me.Cursor = Cursors.Default

EnableOrDisableButtons(_SelectedConnection)

End Using

Catch ex As Exception

Me.Cursor = Cursors.Default

EnableOrDisableButtons(_SelectedConnection)

Dim strErrorCaption As String = "Query attempt failed"

SetStatus(strErrorCaption)

MessageBox.Show(ex.Message, strErrorCaption, MessageBoxButtons.OK, MessageBoxIcon.Error)

End Try

Else

SetStatus("Operation cancelled")

End If

End Sub
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
I executed the code successfully and I got a box which asked for "Enter the query string".
I typed in the following: EXEC dbo.SalesByCategory @Seafood. I got the following box: Query attempt failed. Must declare the scalar variable "@Seafood". I am learning how to enter the string for the "SQL query programed in the subQuery_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnQuery.Click" (see the code statements listed above). Please help and tell me what I missed and what I should put into the query string to get the information of the "Seafood" category out.

Thanks in advance,
Scott Chang

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Nov 7, 2007

I have two tables .. in one (containing user data, lets call it u).The important fields are:u.userName, u.userID (uniqueidentifier) and u.workgroupID (uniqueidentifier)The second table (w) has fieldsw.delegateID (uniqueidentifier), w.workgroupID (uniqueidentifier) The SP takes the delegateID and I want to gather all the people from table u where any of the workgroupID's for that delegate match in w.  one delegateID may be tied to multiple workgroupID's. I know I can create a temporary table (@wgs) and do a: INSERT INTO @wgs SELECT workgroupID from w WHERE delegateID = @delegateIDthat creates a result set with all the workgroupID's .. this may be one, none or multipleI then want to get all u.userName, u.userID FROM u WHERE u.workgroupIDThis query works on an individual workgroupID (using another temp table, @users to aggregate the results was my thought, so that's included)         INSERT INTO @users             SELECT u.userName,u.userID                 FROM  tableU u                LEFT JOIN tableW w ON w.workgroupID = u.workgroupID                WHERE u.workgroupID = @workGroupIDI'm trying to avoid looping or using a CURSOR for the performance hit (had to kick the development server after one of the cursor attempts yesterday)Essentially what I'm after is:             SELECT u.userName,u.userID
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