Dynamic Queries

Dec 8, 2006

Hi,


This question has been asked probably million times, but it sems that I cannod find right answer on search engines.


I need to send parameters to my stored procedure, but not only parameters. For example in where clause I have something like:

where myID = 12


I need to be able to filter results on myID, but one time I need it to be eqal to 12 and other time I need it to be different (<>)  from 12. Some time I even need to add another condition like myID2 = 1. Can I solve this without additional procedures?



 I believe that I saw solution in 3-Tier ArchitectureTutorial Series few weeks ago but it seems that something changed, and I cannot find it anymore. Can anyone help?

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SUM Of Dynamic Queries

Mar 29, 2005

I am trying to get the sum of two dynamic queriesThat is:EXEC('SELECT COUNT(id) as subtotal1...) + EXEC('SELECT COUNT(id) as subtotal2...)If I assign to a variable, say @total, I get errors or NULLs.  Is there a workaround?Thanks in advance for your comments

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Dynamic Queries

Mar 19, 2007

Hi,

I have a parameter in the url to the report. According to that parameter, I need to change the query. For example, url = http://localhost/reportserver?param1=A

if Param1=A, then I need to use query1 for the report

if param1 = B, then I need to use query2 for the report.

I would like to know if I can do this. If not, is there any other way to build query dynamically in the report.

thanks

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Running Dynamic Queries

Jan 1, 2006

I'm creating a search function right now and I'm running into a problem where my search function doesn't know what fields the user will search for, and therefore doesn't know whether or not to put quote marks around specific values or not.

For example, somebody might search for somebody else with year of birth in which case I might have a query:

SELECT userid FROM users WHERE yob = 1970

but somebody else might search for a name, in which case I need

SELECT userid FROM users WHERE first_name = 'Andrew'

or somebody else might search for both and need

SELECT userid FROM users WHERE yob = 1970 AND first_name = 'Andrew'

I'm accomplishing this by having the function (this is in PHP) take an array as an argument, where the key is the MySQL column and the value is the required value for that column. So in the 3rd example, it would be a 2-item array:

yob => 1970
first_name => 'Andrew'

And then cycling through that and dynamically creating a MySQL query based on the received array.

So... my problem is finding a way to specify when quote marks are required and when they're not. Is there any way to just have MySQL default to the format of the column? Also, if anybody thinks this isn't the right way to create a search function, let me know because I'm new at this .

Thanks!

PS: Right now what I'm doing is I'm creating arrays that include names of columns that do and don't need quote marks. Then in construcing the MySQL statement I'm checking to see which array a column is in, and making the quote decision based on that.

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Best Way To Construct Dynamic Queries

Apr 17, 2008

I am working with a form that I wish to construct a dynamic query from the results of. The forum has a date range and two radio buttons. Each radio button enables a list of items that can be clicked. So for example, if we assume the question,

"What is your favorite food, and what toppings do you like on it?" where the radio buttons are foods, the list boxes are toppings. Assuming the user can choose a Hamburger or a Salad with generic toppings, their choices are as such:

They can choose a Hamburger, with every topping
They can choose a Hamburger with a single topping.
They can choose a Hamburger with multiple toppings.
They can choose a Salad with the same combinations as above.
They cannot choose both a Hamburger and a Salad - mutually exclusive items.

Then, I wish to construct a query that, based on the conditions above, retrieves information relavent to their criteria, such a the number of food items to choose from, their price, etc. - basic information. What is the most efficient way to do this? Should I write a stored procedure with numerous conditionals and all available parameters, constructing the sproc as such:





Code Snippet

CREATE PROCEDURE GetFoodInfo
@from datetime,
@to datetime,
@FoodType varchar(20),

@toppings varchar(20)

AS

BEGIN
DECLARE @query varchar(300)
SET @query = 'SELECT COUNT(DISTINCT ' + @FoodType + ') '


IF @FoodType = 'Hamburger'
SET @query = @query + 'FROM Hamburgers '

ELSE
SET @query = @query + 'FROM Salads '

IF @toppings <> 'ALL'

SET @query = @query ' WHERE Toppings = ' + @toppings



EXEC (@query)

Apologies of this syntax is incorrect, but you get the general idea. Of course, this is a small example - in reality, I would have 5-10 conditional requirements Or, should I generate a stored procedure (or simple query) for each operation? For example, assuming each is a stored procedure:

GetHamburgers <-- would get Hamburgers with all toppings
GetHamburgersWithToppings
GetSalads
GetSaladsWithToppings

What is the best method for what I wish to achieve? What is fastest? Is there a better way than I have listed? Thank you.

Again, this is a small example, but I hope someone can help.

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Select Into Using Dynamic Queries

May 5, 2008

I need to create a temporary table using dynamic queries and then i have to use the temporary table for data manipulatuion.

Can someone help me out on this.

EG
sp_executesql N'Select top 1 * into #tmp from table1'
select * from #tmp

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Help Using Dynamic Queries In Temp Table

Nov 20, 2006

The dynamic sql is used for link server. Can someone help. Im getting an error
CREATE PROCEDURE GSCLink
( @LinkCompany nvarchar(50), @Page int, @RecsPerPage int )
AS
SET NOCOUNT ON
--Create temp table
CREATE TABLE #TempTable
( ID int IDENTITY, Company nvarchar(50), AcctID int, IsActive bit )
INSERT INTO #TempTable (Name, AccountID, Active)
--dynamic sql
DECLARE @sql nvarchar(4000)
SET @sql = 'SELECT a.Name, a.AccountID, a.Active
                   FROM CRMSBALINK.' + @LinkCompany + '.dbo.AccountTable a
                   LEFT OUTER JOIN CRM2OA.dbo.GSCCustomer b
                   ON a.AccountID = b.oaAccountID
                   WHERE oaAccountID IS NULL
                   ORDER BY Name ASC'
EXEC sp_executesql @sql
--Find out the first and last record
DECLARE @FirstRec int
DECLARE @LastRec int
SELECT @FirstRec = (@Page - 1) * @RecsPerPage
SELECT @LastRec = (@Page * @RecsPerPage + 1)
--Return the set of paged records, plus an indication of more records or not
SELECT *, (SELECT COUNT(*) FROM #TempTable TI WHERE TI.ID >= @LastRec) AS MoreRecords
FROM #TempTable
WHERE ID > @FirstRec AND ID < @LastRec
 
Error:
Msg 156, Level 15, State 1, Procedure GSCLink, Line 22
Incorrect syntax near the keyword 'DECLARE'.
 
 

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Help In Writing Queries For The Dynamic Values

Mar 18, 2008

Hello, I really have a problem writing queries for the dynamic values.  i follow the below mentioned method to write the queries but its really confusing. ex:  str = "SELECT SO.Description,SO.DiscountPct,SO.Type,SO.Category,SO.StartDate,SO.EndDate,SO.MinQty,SO.MaxQty," +                       "S.Name AS ProductSubCategory,P.Name AS ProductName, C.Name AS ProductCategory FROM Production.Product P " +                       "INNER JOIN Production.ProductSubcategory S ON P.ProductSubcategoryID = S.ProductSubcategoryID " +                       "INNER JOIN Production.ProductCategory C ON S.ProductCategoryID = C.ProductCategoryID " +                       "INNER JOIN Sales.SpecialOfferProduct SOP ON P.ProductID = SOP.ProductID " +                       "INNER JOIN Sales.SpecialOffer SO ON SOP.SpecialOfferID = SO.SpecialOfferID " +                       "WHERE '" + txtStartDate.Text + "' between SO.StartDate AND SO.EndDate AND '" + txtEndDate.Text + "' BETWEEN SO.StartDate AND SO.EndDate " +                       "AND SO.Description Like '" + txtSpecialDesc.Text + "%'";  can anybody help me in writing the queries for dynamic values in an easy way. Thank you Sandeep Chavva  

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Help With Stored Procedures / Dynamic Queries

Jun 12, 2006

Hello, I'm trying to create a Stored Procedure who receives the table name as a parameter, then uses a cursor to obtain every column name and then builds a string like SELECT col1, col2, ... from TABLE

In fact that would be the same as SELECT * FROM table; but I can't do this, because I'll be using this stored procedure to loop through many tables that has different quantity of columns with a DTS, and if a specify the *, then the DTS wouldn't let me do the select with tables with different quantity of fields.

Could you help me please, because my code isn't working:

CREATE PROCEDURE dbo.stp_Test
(
@tablename AS VARCHAR(50)
)

AS

DECLARE @columnname varchar(50)
DECLARE @strsql Nvarchar(500)
DECLARE @query varchar(4000)

SET NOCOUNT ON

DECLARE c1 CURSOR FOR
SELECT column_name FROM information_schema.columns
WHERE table_name = @tablename
OPEN c1
FETCH NEXT FROM c1 INTO @columnname
WHILE @@fetch_status = 0
BEGIN
IF (@strsql is null)
BEGIN
SET @strsql=@columnname
END
ELSE
BEGIN
SET @strsql = @strsql + ',' + @columnname
END

FETCH NEXT FROM c1 INTO @columnname
END
CLOSE c1
DEALLOCATE c1

SELECT @query = 'SELECT ' + @strsql + ' FROM ' + @tablename
EXEC @query

SET NOCOUNT OFF
GO

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Gererating Dynamic Queries During Run Time

Jun 26, 2007

How to Gererating Dynamic Queries During Run Time and execute the results



Thanks in advance

Suresh







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Problem With Dynamic Queries In SQL Tasks

Mar 19, 2008

Hello, i have dynamic queries for example:

DECLARE @query nvarchar(250);
DECLARE @table nvarchar(100);
SET @table = 'table_name';

SET @query=
N'update '+@table+'
set column = 0
where column is null';
EXECUTE sp_executesql @query

SET @query=
N'update '+@table+'
set column2 = 0
where column2 is null';
EXECUTE sp_executesql @query

It is very simple example. My question is: it is possible somehow put these queries in SQL Tasks?
Because if i do like this i get error "The Declare cursor SQL construct or statement is not supported."
Maybe there is other way to solve my problem? Or maybe syntax should be changed?
Thanks for advice

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Using Stored Procedures Are You Safe From Sql Injection If Your Not Using Dynamic Queries ?

Mar 12, 2008

Im reviewing my stored procedures for a new application and got to thinking about protecting against sql injection. I think im pretty safe since im using stored procedures and none of them use any 'exec' commands within them, but im not sure.
I was reading this article, and again all the examples that list a stored procedure, have an 'exec' command somewhere that is the culprit. So, in my case lets say I was doing something like this:

Im generally using regularexpression validation controls on the client side of the application and limiting the max length of the input there as well.


Am I safe, or do I need further input checking within the procedure ?




Code Snippet

CREATE PROCEDURE [dbo].[get_Uploads]
@app varchar(50)
--Init variables
SET @error_number = 0

BEGIN TRY
SELECT [Logid],[Filename],[Label],[UploadDate],[App]
FROM UploadLog au
WHERE [App]=@app
END TRY
BEGIN CATCH
SET @error_number = -2
END CATCH

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Dynamic Queries With Data Reader Source Adapter

Apr 16, 2008

I am a business user trying to build an incremental ETL package with SSIS. I have a working prototype on SQL Server 2005 where I select the max(ID) from the last successful run and pass that value into a variable. Then, in my Data Flow step, I select an OLE DB source adapter and use this variable in a custom select statement.

Here's my challenge....the live data is actually in a Postgres DB so I have to use a Data Reader Source adapter. When I try to pass my variable to this adapter the job bombs out. Does anyone know how to dynamically update the query text inside a Data Reader source adapter using variables or otherwise?

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Best Practice To Pull Data From Sql Server 2000 To Sql Server 2005 With Dynamic Queries

May 3, 2007

Hi There,

I need to pull data using input from one table in sql server 2005. I have to query against the sql server 2000 database and pull data into sql server 2005. I have a list of ids that I have to pass to a query to get the desired data. What is the best practice for this. Can I use SSIS or do I need to build an app in C#? Can somebody please reply back?

Thanks a lot!!

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Importing Excel Sheet Which Have Dynamic Column Name And Dynamic Number Of Columns

Aug 25, 2007

Hi Craig/Kamal,

I got your email address from your web cast. I really enjoyed the web cast and found it to be
very informative.

Our company is planning to use SSIS (VS 2005 / SQL Server 2005). I have a quick question
regarding the product. I have looked for the information on the web, but was not able to find
relevant information.

We are getting Source data from two of our client in the form of Excel Sheet. These Excel sheets
Are generated using reporting services. On examining the excel sheet, I found out that the name
Of the columns contain data itself, so the names are not static such as Jan 2007 Sales, Feb 2007 Sales etc etc.
And even the number of columns are not static. It depends upon the range of date selected by the user.

I wanted to know, if there is a way to import Excel sheet using Integration Services by defining the position
Of column, instead of column name and I am not sure if there is a way for me to import excel with dynamic
Number of columns.

Your help in this respect is highly appreciated!

Thanks,


Hi Anthony, I am glad the Web cast was helpful.

Kamal and I have both moved on to other teams in MSFT and I am a little rusty in that area, though in general dynamic numbers of columns in any format is always tricky. I am just assuming its not feasible for you to try and get the source for SSIS a little closer to home, e.g. rather than using Excel output from Reporting Services, use the same/some form of the query/data source that RS is using.

I suggest you post a question on the SSIS forum on MSDN and you should get some good answers.
http://forums.microsoft.com/msdn/showforum.aspx?forumid=80&siteid=1
http://forums.microsoft.com/msdn/showforum.aspx?forumid=80&siteid=1

Thanks



Craig Guyer
SQL Server Reporting Services

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SSRS 2005 - Email Report On Execution To Dynamic List With Dynamic Parameters = No Schedule

Nov 23, 2007

Hi,
I have a need to display on screen AND email a pdf report to email addresses specified at run time, executing the report with a parameter specified by the user. I have looked into data driven subscriptions, but it seems this is based on scheduling. Unfortunately for the majority of the project I will only have access to SQL 2005 Standard Edition (Production system is Enterprise), so I cannot investigate thoroughly.

So, is this possible using data driven subscriptions? Scenario is:

1. User enters parameter used for query, as well as email addresses.
2. Report is generated and displayed on screen.
3. Report is emailed to addresses specified by user.

Any tips on how to get this working?

Thanks

Mark Smith

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Merge Replication W/ Dynamic Row Filter - Not 'dynamic' After First Initial Sync?

May 2, 2007

If anyone could confirm...

SQL Server 2000 SP4 to multiple SQL Server 2005 Mobile Edition on PDAs. My DB on SQL2k is published with a single dynamic row filter using host_name() on my 'parent' table and also join filters from parent to child tables. The row filter uses joins to other tables elsewhere that are not published to evaluate what data is allowed through the filter.

E.g. Published parent table that contains suppliers names, etc. while child table is suppliers' products. The filter queries host_name(s) linked to suppliers in unpublished table elsewhere.

First initial sync with snapshot is correct and as I expected - PDA receives only the data from parent (and thus child tables) that matches the row filter for the host_name provided.

However - in my scenario host_name <--> suppliers may later be updated E.g. more suppliers assigned to a PDA for use or vice versa. But when I merge the mobile DB, the new data is not downloaded? Tried re-running snapshot, etc., no change.

Question: I thought the filters would remain dynamic and be applied on each sync?

I run a 'harmless' update on parent table using TSQL e.g. "update table set 'X' = 'X'" and re-sync. Now the new parent records are downloaded - but the child records are not!

Question: I wonder why if parent records are supplied, why not child records?

If I delete existing DB and sync new, I get the updated snapshot and all is well - until more data added back at server...

Any help would be greatly appreciated. Is it possible (or not) to have dynamic filters run during second or subsequent merge?

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T-SQL (SS2K8) :: How To Add Inline TVF With Dynamic Columns From CRL Dynamic Pivot

Mar 9, 2015

I have tried building an Inline TVF, as I assume this is how it would be used on the DB; however, I am receiving the following error on my code, I must be missing a step somewhere, as I've never done this before. I'm lost on how to implement this clr function on my db?

Error:
Msg 156, Level 15, State 1, Procedure clrDynamicPivot, Line 18
Incorrect syntax near the keyword 'external'.
CREATE FUNCTION clrDynamicPivot
(
-- Add the parameters for the function here
@query nvarchar(4000),
@pivotColumn nvarchar(4000),

[code]....

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Mar 24, 2007

I have a Stored Procedure for processing a Bill of Material.

One column on the Assembly Table is a Function Name that contains some busniess rules.

OK, now I'm doing a Proof of Concept and I'm stumped.

Huuuuh!

I will ultimately have about 100 of these things. My plan was using Dynamic SQL to go execute the function.

Note: The function just returns a bit.

So; here's what I had in mind ...

if isnull(@FnNameYN,'') <> ''
exec spinb_CheckYN @FnNameYN, @InvLineID, @FnBit = @FnBit output




CREATE PROCEDURE dbo.spinb_CheckYN
@FnNameYN varchar(50),
@InvLineID int,
@FnBit bit output
AS

declare @SQL varchar(8000)

set @SQL = '
if dbo.' + @FnNameYN + ' (' + convert(varchar(31),@InvLineID) + ')) = 1
set @FnBit = 1
else
set @FnBit = 0'

exec (@SQL)
GO



Obviously; @FnBit is not defined in @SQL so that execution will not work.
Server: Msg 137, Level 15, State 1, Line 4
Must declare the variable '@FnBit'.
Server: Msg 137, Level 15, State 1, Line 5
Must declare the variable '@FnBit'.


So; is there a way to get a value out of a Dynamic SQL piece of code and get that value INTO my OUTPUT variable?


My many thanks to anyone who can solve this riddle for me.
Thank You!


Sigh: For now, it looks like I'll have a huge string of "IF" statements for each business rule function, as follows:
Hopefully a better solution comes to light.

------ Vertical Build1 - Std Vanes -----------
if @FnNameYN = 'fnb_YN_B1_14'
BEGIN
if dbo.fnb_YN_B1_14 (convert(varchar(31),@InvLineID) ) = 1
set @FnBit = 1
else
set @FnBit = 0
END

------ Vertical Build1 - Scissor Vanes -----------
if @FnNameYN = 'fnb_YN_B1_15'
BEGIN
if dbo.fnb_YN_B1_15 (convert(varchar(31),@InvLineID) ) = 1
set @FnBit = 1
else
set @FnBit = 0
END
.
.
.
etc.

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Oct 24, 2004

I've looked up Books Online on Dynamic Cursor/ Dynamic SQL Statement.

Using the examples given in Books Online returns compilation errors. See below.

Does anyone know how to use Dynamic Cursor/ Dynamic SQL Statement?

James



-- SQL ---------------

EXEC SQL BEGIN DECLARE SECTION;
char szCommand[] = "SELECT au_fname FROM authors WHERE au_lname = ?";
char szLastName[] = "White";
char szFirstName[30];
EXEC SQL END DECLARE SECTION;

EXEC SQL
DECLARE author_cursor CURSOR FOR select_statement;

EXEC SQL
PREPARE select_statement FROM :szCommand;

EXEC SQL OPEN author_cursor USING :szLastName;
EXEC SQL FETCH author_cursor INTO :szFirstName;



--Error--------------------
Server: Msg 170, Level 15, State 1, Line 23
Line 23: Incorrect syntax near ';'.
Server: Msg 1038, Level 15, State 1, Line 24
Cannot use empty object or column names. Use a single space if necessary.
Server: Msg 1038, Level 15, State 1, Line 25
Cannot use empty object or column names. Use a single space if necessary.
Server: Msg 170, Level 15, State 1, Line 27
Line 27: Incorrect syntax near ';'.
Server: Msg 170, Level 15, State 1, Line 30
Line 30: Incorrect syntax near 'select_statement'.
Server: Msg 170, Level 15, State 1, Line 33
Line 33: Incorrect syntax near 'select_statement'.
Server: Msg 102, Level 15, State 1, Line 35
Incorrect syntax near 'author_cursor'.
Server: Msg 170, Level 15, State 1, Line 36
Line 36: Incorrect syntax near ':'.

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Apr 15, 2008

I have a requirment which i have partly accomplished , but could not get through completely

i have a file which comes in a standard format ending with date and seq number ,

suppose , the file name is abc_yyyymmdd_01 , for first copy , if it is copied more then once the sequence number changes to 02 and 03 and keep going on .

then i need to transform those in to new file comma delimited destination file with a name abc_yyyymmdd,txt and others counting file counting record abc_count_yyyymmdd.txt. and move it to a designated folder. and the source file is then moved to archived folder


what i have taken apprach is

script task select source file --------------------> data flow task------------------------------------------> script task to destination file

dataflow task -------------------------> does count and copy in delimited format



what is happening here is i can accomlish a regular source file convert it to delimited destination file --------> and move it to destination folder with script task .

but cannot work the dynamic pick of a source file.


please advise with your comments or solution you have

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Jul 20, 2005

HelloWhen I use a PreparedStatement (in jdbc) with the following query:SELECT store_groups_idFROM store_groupsWHERE store_groups_id IS NOT NULLAND type = ?ORDER BY group_nameIt takes a significantly longer time to run (the time it takes forexecuteQuery() to return ) than if I useSELECT store_groups_idFROM store_groupsWHERE store_groups_id IS NOT NULLAND type = 'M'ORDER BY group_nameAfter tracing the problem down, it appears that this is not preciselya java issue, but rather has to do with the underlying cost of runningparameterized queries.When I open up MS Enterprise Manager and type the same query in - italso takes far longer for the parameterized query to run when I usethe version of the query with bind (?) parameters.This only happens when the table in question is large - I am seeingthis behaviour for a table with > 1,000,000 records. It doesn't makesense to me why a parameterized query would run SLOWER than acompletely ad-hoc query when it is supposed to be more efficient.Furthermore, if one were to say that the reason for this behaviour isthat the query is first getting compliled and then the parameters aregetting sent over - thus resulting in a longer percieved executiontime - I would respond that if this were the case then A) it shouldn'tbe any different if it were run against a large or small table B) thisperformance hit should only be experienced the first time that thequery is run C) the performance hit should only be 2x the time for thenon-parameterized query takes to run - the difference in response timeis more like 4-10 times the time it takes for the non parameterizedversion to run!!!Is this a sql-server specific problem or something that would pertainto other databases as well? I there something about the coorect use ofbind parameters that I overall don't understand?If I can provide some hints in Java then this would be great..otherwise, do I need to turn/off certain settings on the databaseitself?If nothing else works, I will have to either find or write a wrapperaround the Statement object that acts like a prepared statement but inreality sends regular Statement objects to the JDBC driver. I wouldthen put some inteligence in the database layer for deciding whetherto use this special -hack- object or a regular prepared statementdepending on the expected overhead. (Obviously this logic would onlybe written in once place.. etc.. IoC.. ) HOWEVER, I would desperatelywant to avoid doing this.Please help :)

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Mar 2, 2014

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sample file name:

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The expression is looking like this.

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-- user filepath is a variable from ssis package. File name is the output from SQL query. using script task i have assigned the values to @[User::FileName] .

When I debugged the script task the value getting properly but same variable am using for Flafile destination. but its not working.

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Mar 9, 2007

I have created a dynamic SQL program that returns a range of columns (1 -12) based on the date range the user may select. Each dynamic column is month based, however, the date range may overlap from one year to another. Thus, the beginning month for one selection may be October 2005, while another may have the beginning month of January 2007.

Basically, the dynamic SQL is a derived Pivot table. The problem that I need to resolve is how do I now use this dynamic result set in a Report. Please keep in mind that the name of the columns change based on the date range select.

I have come to understand that a dynamic anything is a moving target!



Please advise.

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Aug 9, 2006

Hi,
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i want to write my own query without help of sqlDataSource control from start something like
sqldatasource con=new sqldatasource;
con.connection String=""
then what all things will come........ ???
and please give me some poitners to some articles which help one to do the requested.
 
Regards,
 
 

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Dec 7, 2007

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Dec 18, 2007

 how can i execute  for example



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Jun 18, 2004

hi which is bettere to use a quesry from the code or to use a Stored Procedure and call the SP from the code

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Oct 21, 2004

Hi All,

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SELECT * FROM pages WHERE show = 'yes' ORDER BY id Desc;

Regards,

Rich

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Jan 23, 2006

Hi,I have 5 tables in sql database, naming Book, Category, Subject, UserDownload, User.In Book table, BookID, BookTitle, CategoryIDIn Category table, CategoryID, CategoryNameIn Subject table, SubjectID, SubjectName, CategoryIDIn UserDownload table, UserID, BookIDIn User table, UserID, UserNameI used Book to store information of books. Those books has many categories. In those categories, there is also some subjects.When user downloads book, I update UserDownload table.The result I want to get is, Top Ten Download Subject. How can I get? Please help me.

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Aug 3, 2000

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Feb 7, 2003

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