Sql Query Groupings

May 23, 2007

I have a requirement in the application that. I have columns in the following format:- 
Col1       Col2       Col3
1              A1           A2
1              A1           B2
2              B1           C2
1              A1           D3 
These type of contents the table have contents . What I require id if for any row if ‘Col1’ and ‘Col2’ values are same then the n the query should show only one record with ‘Col3’ values concatenated as comma separated array.
For the above e.g. the result should be. 
Col1       Col2       Col3
1              A1           A2, B2, D3
2              B1           C2

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Dynamically Creating Excel Worksheets Based On Groupings From Query In SSIS

Apr 24, 2008

Is there anyway to dynamically create Excel Worksheets based on a group identity results from a query?

Thanks!

SkySeek.

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Week Groupings

Jul 26, 2007

Hi all,

I have this code below and it appears to work, but I wondered if there was a better way.

Basically I have a table with some sales. The amount sold is stored in a varchar (for a very stupid reason) called ticketNo, the date of the sale is stored in txDate (thankfully this is a date).

We need to report out the total amount sold for a period in weekly groupings with the week starting on Monday. If a week starts within the period specified but does not finish we extend the period to include the whole week.

As I said the code below appears to work (no I have not tested extensively), but it looks like it will be pretty resouce intensive.

Any suggestions?

declare @minTxDate DateTime
declare @maxTxDate DateTime

set @minTxDate = '02-Jul-2007'
set @maxTxDate = '31-Aug-2007'

declare @StartOfYear DateTime
declare @LocalMaxTxDate DateTime
declare @WeekDay int
declare @StartWeek int
declare @EndWeek int

set @StartOfYear = '01-Jan-' + Convert(varchar(4),Year(getDate()))
set @WeekDay = DatePart(weekday,@StartOfYear)
set @StartWeek = DatePart(week, @minTxDate)
set @EndWeek = DatePart(week, @maxTxDate)

set @LocalMaxTxDate = DateAdd(d,10,@maxTxDate)

set DATEFIRST 1
select
DateAdd(d,((DatePart(week, tmpSale.txDate)-1)*7)+@WeekDay-1, @StartOfYear) 'FirstDayOfWeek',
DatePart(week, tmpSale.txDate) 'WeekOfSale',
COALESCE(sum (Convert(decimal, ticketNo)),0) 'TonnesSold'
from
(select
Sale.txDate,
Sale.ticketNo
from Sale
where Sale.txDate between @minTxDate and @LocalMaxTxDate)
tmpSale
where DatePart(week, tmpSale.txDate) between @StartWeek and @EndWeek
group by DatePart(week, tmpSale.txDate),
DateAdd(d,((DatePart(week, tmpSale.txDate)-1)*7)+@WeekDay-1, @StartOfYear)

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Ranking With Groupings

Sep 4, 2015

how I could achieve a ranking number, where I have some grouping involved.I want to have the groups in sets of 4, but if I get to a new person the ranking increases, even if I haven't filled the group. For example:

Name Year Sales Ranking
-------------------- ----------- ----------- --------------------
John Smith 2009 1296 1
John Smith 2010 1296 1
John Smith 2011 1296 1
John Smith 2012 1296 1
John Smith 2013 1296 2

[code]....

So, when I get to John's 5 year, the Rank increased. I then only had two more rows before I get to Nina, but the Rank number goes up, as the details are for a different person from the prior user.

Select *, DENSE_RANK() over (Order by Name) + ((RANK() over (Partition by Name Order by Year) - 1) /4) as Ranking
from #Test
Order by Name, Year

Drop Table #TestThis works for John, but Nina then has a Ranking of 2 for her only year, where as she should be 3. Steve also then has a value one too low for all of his ranks.

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Groupings In Matrix Layout?

Mar 28, 2006

Hello,



I am trying to come up with a Matrix report using RS 2005 that looks like this one below. I have row data: question, columns data: Ethnicity and Gender, detail data: Gender average response and Ethnicity average reponse. I utlilized Report Wizard to create a report in a Matrix format , however I wasn't able to have Gender and Ethnicity column on the same line. The report wizard groups columns so Gender is a subset of Ethnicity or Ethnicity is a subset of Gender. How can is solve this issuee so that Gender and Ethnicity data is presented in a Matrix format and Gender and Ethnicity are not part of each other.

Thank you!
















F
M
Asian
Multi-cultural
Non-resident
Unknown
White
Black
Hispanic
Native American

a. Worked on a paper or project that required integrating ideas or information from various sources
3.95
3.99
3.54
4.50
3.28
4.20
4.18
4.04
3.92
3.90

b. Used library resources
4.26
4.09
4.12
4.33
4.10
4.33
4.26
4.22
4.10
4.10

c. Prepared multiple drafts of a paper or assignment before turning it in
3.97
3.76
3.80
4.50
3.58
3.86
3.95
4.09
4.00
4.00

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Mar 17, 2007

When defaulted to Visible or Invisible, +/- displays correctly. But when using the Expression, + is always showing as the default even when a group is expanded. Is this expected? TIA.



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Sep 28, 2006

Hello,
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I applied the fuzzy lookup in a table (tblValues). As source table i have the tblValues, and as reference table in Fuzzy Lookup i have the tblValues as well, resulting null values in all fields/columns.

Do i have to create my own reference table? If yes, how do i do that and what values will i have in this table?I didn't understand how the reference table must be in order the algorithm to work. Any suggestions?

Thank you in advance!

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Sep 18, 2007

Dear people,
I have a problem with a report where users want to see transacctions grouped by Account number and type(e.g: incomes and payments).

And so I use a table object where I put 2 groups:
1) Group by Account Number: Field!Account.Value
2) Group by Transaction Type: Field!Type.Value
I put in the detaill row group by: Field!Type.Value and Field!Account.Value.

When I execute the report only show the first row per transaction type, but the dataset has some rows per transaction type.

Please help me with this problem, thanks...

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Mar 16, 2006

I€™ve created with the help of some great people an SSIS 2005 package which does the follow so far:
 
1)       Takes an incoming txt file.  Example txt file: http://www.webfound.net/split.txt    
 
The txt file going from top to bottom is sort of grouped like this
     Header Row (designated by €˜HD€™)
          Corresponding Detail Rows for the Header Row
           €¦..
     Next Header Row
          Corresponding Detail Rows
 
     €¦and so on  
 
       http://www.webfound.net/rows.jpg
 
2)       Header Rows are split into one table, Maintenance Detail Rows into another, and Payment Detail Rows into a third table.  A uniqueID has been created for each header and it€™s related detail rows to form a PK/FK relationship as there was non prior to the import, only the relation was in order of header / related rows below it when we first started.  The reason I split this out is so I can massage it later with stored proc filters, whatever€¦
 
Now I€™m trying to somehow bring back the data in those table together like it was initially using a query so that I can cut out each of the Header / Detail Row sections into their own txt file.  So, if you look at the original txt file, each new header and it€™s related detail rows (example of a cut piece would be http://www.webfound.net/rows.jpg) need to be cut out and put into their own separate txt file. 
 
This is where I€™m stuck.  How to create a query to combine it all back into an OLE DB Souce component, then somehow read that souce and split out the sections into their own individual txt files.
 
The filenames of the txt files will vary and be based on one of the column values already in the header table.
 
Here is a print screen of my package so far:
 
http://www.webfound.net/tasks.jpg
 
http://www.webfound.net/Import_MaintenanceFile_Task_components.jpg
 
http://www.webfound.net/DataFlow_Task_components.jpg
 
Let me know if you need more info.  Examples of the actual data in the tables are here:
 
http://www.webfound.net/mnt_headerRows.txt
http://www.webfound.net/mnt_MaintenanceRows.txt
http://www.webfound.net/mnt_PaymentRows.txt
 
Here's a print screen of the table schema:
http://www.webfound.net/schema.jpg

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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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May 28, 2008

ok can someone tell me why i get two different answers for the same query. (looking for last day of month for a given date)

SELECT DATEADD(ms, - 3, DATEADD(mm, DATEDIFF(m, 0, CAST('12/20/2006' AS datetime)) + 1, 0)) AS Expr1
FROM testsupplierSCNCR
I am getting the result of 01/01/2007

but in query analizer I get the result of

12/31/2006

Why the different dates

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Jan 22, 2001

Hi,

I get this error dialog when I try to open all the rows of any table from Enterprise manager..

Any help would be really appreciated..

Thanks,
-Srini.

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Error: 8624 Internal Query Processor Error: The Query Processor Could Not Produce A Query Plan.

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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Query Works In 'test Query' But Refuses To Show Up In The Datagrid On A Web Page - Urgent!

Mar 28, 2007

Hey, i've written a query to search a database dependant on variables chosen by user etc etc. Opened up a new sqldatasource, entered the query shown below and went on to the test query page. Entered some test variables, everything works as it should do. Try to get it to show in a datagrid on a webpage - nothing. No data shows.
 SELECT dbo.DERIVATIVES.DERIVATIVE_ID, count(*) AS Matches
FROM dbo.MAKES INNER JOIN
dbo.MODELS ON dbo.MAKES.MAKE_ID = dbo.MODELS.MAKE_ID INNER JOIN
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
dbo.ATTRIBUTES ON dbo.[VALUES].ATTRIBUTE_ID = dbo.ATTRIBUTES.ATTRIBUTE_ID
WHERE ((ATTRIBUTES.ATTRIBUTE_ID = @ATT_ID1 and (@VAL1 is null or VALUE = @VAL1)) or
(ATTRIBUTES.ATTRIBUTE_ID = @ATT_ID2 and (@VAL2 is null or VALUE = @VAL2)) or
(ATTRIBUTES.ATTRIBUTE_ID = @ATT_ID3 and (@VAL3 is null or VALUE = @VAL3)) or
(ATTRIBUTES.ATTRIBUTE_ID = @ATT_ID4 and (@VAL4 is null or VALUE = @VAL4)) )
GROUP BY dbo.DERIVATIVES.DERIVATIVE_ID
HAVING count(*) >= CASE WHEN @VAL1 IS NOT NULL THEN 1 ELSE 0 END +
CASE WHEN @VAL2 IS NOT NULL THEN 1 ELSE 0 END +
CASE WHEN @VAL3 IS NOT NULL THEN 1 ELSE 0 END +
CASE WHEN @VAL4 IS NOT NULL THEN 1 ELSE 0 END -2
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 %>"
SelectCommand="&#9;SELECT dbo.DERIVATIVES.DERIVATIVE_ID, count(*) AS Matches&#13;&#10;&#9;FROM dbo.MAKES INNER JOIN&#13;&#10;&#9;&#9;&#9;&#9; dbo.MODELS ON dbo.MAKES.MAKE_ID = dbo.MODELS.MAKE_ID INNER JOIN&#13;&#10;&#9;&#9;&#9;&#9; dbo.DERIVATIVES ON dbo.MODELS.MODEL_ID = dbo.DERIVATIVES.MODEL_ID INNER JOIN&#13;&#10;&#9;&#9;&#9;&#9; dbo.[VALUES] ON dbo.DERIVATIVES.DERIVATIVE_ID = dbo.[VALUES].DERIVATIVE_ID INNER JOIN&#13;&#10;&#9;&#9;&#9;&#9; dbo.ATTRIBUTES ON dbo.[VALUES].ATTRIBUTE_ID = dbo.ATTRIBUTES.ATTRIBUTE_ID&#13;&#10;&#9;WHERE ((ATTRIBUTES.ATTRIBUTE_ID = @ATT_ID1 and (@VAL1 is null or VALUE = @VAL1)) or&#13;&#10;&#9;&#9; (ATTRIBUTES.ATTRIBUTE_ID = @ATT_ID2 and (@VAL2 is null or VALUE = @VAL2)) or&#13;&#10;&#9;&#9; (ATTRIBUTES.ATTRIBUTE_ID = @ATT_ID3 and (@VAL3 is null or VALUE = @VAL3)) or&#13;&#10;&#9;&#9; (ATTRIBUTES.ATTRIBUTE_ID = @ATT_ID4 and (@VAL4 is null or VALUE = @VAL4)) )&#13;&#10;&#9;GROUP BY dbo.DERIVATIVES.DERIVATIVE_ID&#13;&#10;&#9;HAVING count(*) >= CASE WHEN @VAL1 IS NOT NULL THEN 1 ELSE 0 END +&#13;&#10;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9; CASE WHEN @VAL2 IS NOT NULL THEN 1 ELSE 0 END +&#13;&#10;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9; CASE WHEN @VAL3 IS NOT NULL THEN 1 ELSE 0 END +&#13;&#10;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9; CASE WHEN @VAL4 IS NOT NULL THEN 1 ELSE 0 END -2&#13;&#10;&#9;ORDER BY count(*) DESC&#13;&#10;">
<SelectParameters>
<asp:ControlParameter ControlID="DropDownList1" Name="ATT_ID1" PropertyName="SelectedValue" />
<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 %>"
SelectCommand="SELECT * FROM [ATTRIBUTES]"></asp:SqlDataSource>
<br />
<asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="SqlDataSource2"
DataTextField="ATTRIBUTE_NAME" DataValueField="ATTRIBUTE_ID">
</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"
DataSourceID="SqlDataSource1">
<Columns>
<asp:BoundField DataField="DERIVATIVE_ID" HeaderText="DERIVATIVE_ID" InsertVisible="False"
ReadOnly="True" SortExpression="DERIVATIVE_ID" />
<asp:BoundField DataField="Matches" HeaderText="Matches" ReadOnly="True" SortExpression="Matches" />
</Columns>
</asp:GridView>
</asp:Content>
 AFAIK I have configured the source to pick up the dropdownlist value and the textbox value (the text box is autopostback).
 Am i not submitting the data correctly? (It worked with a simple query...just not with this one). I have tried a stored procedure which works when testing just not when its live on a webpage.
 Please help!
 
(Visual Web Devleoper 2005 Express and SQL Server Management Studio Express)
 

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Aug 5, 2014

I have the following code.

SELECT _bvSerialMasterFull.SerialNumber, _bvSerialMasterFull.SNStockLink, _bvSerialMasterFull.SNDateLMove, _bvSerialMasterFull.CurrentLoc,
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_bvSerialNumbersFull.SNTxDate, _bvSerialNumbersFull.SNTxReference, _bvSerialNumbersFull.SNTrCodeID, _bvSerialNumbersFull.SNTransType,
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[code]...

However, as you can see, the original select query is run twice and joined together.What I was hoping for is this to be done in the original query without the need to duplicate the original query.

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Jun 15, 2007

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Thanks in advance



Daniel Buchanan.



If this was the wrong forum to post this on, please move this question to the correct one. I need this answer soon.

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Jul 19, 2015

We have a issue with a MDS server that have been over us for a couple of days, the original error msg from SQL Server Engine is the one "The query processor could not produce a query plan" but the ones we get on the Excel-Addin are "Sequece contains no elements" or "The value cannot be null" T

• Using Microsoft SQL Server 2012 (SP1) - 11.0.3393.0 (X64) for 6months on this server without issues

• Two weeks ago we started to have 2 errors: "Sequence Contains No Elements" | "The Value Cannot Be Null"

• 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

• We updated to SQL 2012 SP2 + CU4 but the error persisted ...

Looking at the MDSTraceLog we are routed to the this msg

SQL Error Debug Info: Number: 8624, Message: Internal Query Processor Error: The query processor could not produce a query plan. For more information, contact Customer Support Services., Server: bbdvsql03inst01, Proc: udpMetadataEntityGetDetailsXML, Line: 28

At line 28 udpMetadataEntityGetDetailsXML is calling udfMetadataEntityGetDetailsXML … and here is where we stopped

** Error found when try to get data from a entity using Excel add-in **
===================================
Sequence contains no elements
------------------------------
Program Location:
   at Microsoft.MasterDataServices.AsyncEssentials.AsyncResultBase.EndInvoke()
   at Microsoft.MasterDataServices.ExcelAddInCore.AsyncProviderBase`1.EndOperation(IAsyncResult ar)

[code]....

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create table #temptable (columname varchar(150), columnheader varchar(150), earliestdate varchar(120), mostrecentdate varchar(120))
insert into #temptable
SELECT ColumnName, headername, '', '' FROM eddsdbo.[ArtifactViewField] WHERE ItemListType = 'DateTime' AND ArtifactTypeID = 10
--column name
declare @cname varchar(30)

[code]...

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-- The 3rd query uses an incorrect column name in a sub-query and succeeds but rows are incorrectly qualified. This is very DANGEROUS!!!
-- The issue exists is in 2008 R2, 2012 and 2014 and is "By Design"

set nocount on
go
if object_id('tempdb.dbo.#t1') IS NOT NULL drop table #t1
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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Apr 30, 2007



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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Jul 30, 2015

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I want my output to be

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FROM...
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<ParameterList>
<ColumnReference Column="@Measure" ParameterCompiledValue="'all'" />
</ParameterList>
</QueryPlan>
</StmtSimple>

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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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