.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
david stephan
Gaurav Pal
Post New Web Links

Merge Join Failue

Posted By:      Posted Date: October 08, 2010    Points: 0   Category :Sql Server

I'm working with SQL 2008 SSIS.  I'm trying to join two tables on email fields.  For test purposes I have copied some of the email addresses from table A to table B to insue I have matching values.  The OLE DB Source components each use a SQL query that sorts the output by the email addresses in ascending order.   For each of the two source components I've set the IsSorted property to True and set the Output Columns SortKeyPosition property to 1.  Within the SQL query I've also added trim functions to eliminate any possible extra spaces.  Since for testing purposes table B's email addresses are copies of email addresses in table A there is no issue with case.   When linking the two outputs using the Merge Join flow component I do not get any matches.

I've tried sorting using a Sort component rather than within the OLD DB Source query, but it seems to lock up on one of my flows (about 1.5 million records) and won't proceed.

At this point I don't know what else to try. 

View Complete Post

More Related Resource Links

repeating merge joins using full outer join - should be possible without sort, but cannot get the co

Hello,   I am trying to combine several source tables with Merge Join.  For the Moment I have three source tables all already sorted in the source query and the is sorted property with the correct keys set. (its an aggregate query with group by and sort by the key columns) Then I do a merge join between two of the tables - with a full outer join. Then I just want to do another merge join with the output of the next result. but as the merge join do not combine the key columns into one column I need to add a derived column which substitute null values on the left side of the join with values from the right side of the join. The second merge then says only the left columns of the first merge join is sorted, but not the comined columns. If i Replace with a derived column the left side primary key columsn with the combinded key columns the next merge join says the input is not sorrted? But the output must be sorted. So how do I get the next merge join working without the ssis sort transformation? the data is sorted, but the component does not recognize the sorted data? I do not want to use (can use) the sort because there are flowing >= 500 Mio. records through the pipeline. Any help appreciated.   Hanneshttp://www.hmayer.net/

Merge Join: Full Outer Join - keep key values in case of no-match

I'm using the Merge Join to join several different incoming flows into one flow.  I've configured the joins to use a Full Outer Join because I need all records from all sources. In the case of a no-match, I want the component to keep the values of join key fields instead of setting them to NULL.  How can I achieve that?  (Activating the checkbox doesn't help, because that adds a new field to the output instead of re-using the existing one.)

Problem with Merge Join and condition splt trasnformations in SSIS 2008

  Hey, While working SSIS in 2008 we have encountering some weird problems with Merge, Merge Join and Condition Spilt transformations, here are the details... Condition Split and Merge Join and Condition Split: Please check the below diagram(not really just tried) for the complete details. Just FYI data is in sorted order   condition Split -> 420000      | 18                                                          | 419982  Merge Join(left)  -- src1(6000)      |10  Condition Split      |9     |1   the merge join transformation is not returning the complete 18 rows to the next transformation that's why we are missing 8 rows. But if we adds a sort transformation (getting warning as data is already sorted) before merge then complete 18 rows were passing to the condition split. Also tried modifing the source query just to return 18 rows then also it was passing the 18 rows to next trasnformation except with full load.       Merge: We have two sorted data sources and first one has 40000 records and second source have 12000 records and after the Merge transformation we have Condition Split transfor

Merge Join vs. T-Sql Inner Join?



I noticed this has been posted before - but could not get it working with the information on that post so here goes:

I have a T-Sql query that INNER JOINs 2 tables on one field - this returns 6,383 records.

(the one table contains 6,383 records and the other table 12 records)

However when I try to implement a data flow task with two data sources (one for each table) and sort the and then try to use the Merge Join transformation to sort and join them on the exact same field the result is 11,073 records.

What is going on here? logically this does not make sense to me ...

I.W Coetzer

Removing columns after Merge Join ?



I have the scenario (using a third party component) where certain columns must not be present as input.

I am doing a Full Outer - Merge Join.

This results in:



but now in some cases the LeftPK may be  null in other cases the RightPK may be null,

so i'm creating a derived column to check:

ISNULL(LeftPK) ? RightPK : LeftPK

and call this the TruePK

this all works however now i'm left with 3 columns

LeftPK; RightPK; TruePK

Is there some kind of transform (other than script task) that i can use to get rid of Left and Right PK columns before sending input to next third party component?

I.W Coetzer

Merge join and IsSorted for joining more than 2 inputs


I have an XML file like this:


 <e1 myvalue="test">



   <detail value1="hello" value2="world" />

   <detail value1="

Merge join in SSIS

how to use merge join in SSIS?

Merge Join in SSIS 2005 Vs 2008



I have a process which reads from 2 tables (using two connection managers) and "merge join" them to a third table by using left outer join.

This process is implemented on SSIS 2005 and SSIS 2008 identically, however, for some reason I get less records at the third table at the 2008 process.

When implementing this merge join on Sql Server 2008 and Sql Server 2005 I get the same result as I got at the SSIS 2005 process - so it seems like the problem is at the SSIS 2008 process.
I've checked the merge join properties - they look similar on 2005 and 2008.
Does anyone knows if the 2008 merge join object should be configured differently than the 2005 merge join?
I have nulls on some the fields that connect the two tables - do you think it's got to do with it?
What else can I check?

Mail Merge




I am after creating a mail merge documents from datasource and .dot template file on server side. Can you give me an idea how i will achive this?


Thanks in advance.



Syed Hussain



Merge SQL to Excel--Need .Net button to open on fly and have current SQL data!


           Hello all,
I do not know if this is the proper place to ask this, but my question is...
I have a SQL DB and I want to convert it to Excel Sheet (I did this using the wizard)!
In my aspx page I have a button.  So when I press this button I want the Excel sheet to open!  But I need the Excel sheet to show me the up to date information that is in the SQL DB.  

Join Two Tables and Prepare Report



            I have a select query which is executing well. Now, I want to add one more field to that query. That field is not in the current query table, It is in the another table.

How do I join those two tables and get that field value in the existing select query.?


Linq join fields for return data


  how would I join fields together?

           return (from c in storedb.Product_Categories

                         where c.Category_Name.Contains(searchText)
                         orderby c.Category_Name
                         select new {
                                    c.Category_Key && " ;" && c.Category_Name // HOW CAN I DO THIS.....

How to merge 3 separated color (Red, Green and Blue) saved as grayscale images images into colored i


Hi friends, I have separated Red, Green and Blue color from a bitmap image and stored it in grayscale (obviously).  Now I want to know how can I merge it so that I can get the exact previous colour, when I am merging them by reading its color values but it is giving  me grayscale image :( . Please help me out with some working sample code. Thanking in anticipation.

I am using the following code:

 public bool mergeToRGBandWriteBitmap(string sourceRFile, string sourceGFile, string sourceBFile, string targetFile)
            bool isSuccessfullywritten = false;
                Bitmap bitmapRed = (Bitmap)Image.FromFile(sourceRFile);
                Bitmap bitmapGreen = (Bitmap)Image.FromFile(sourceGFile);
                Bitmap bitmapBlue = (Bitmap)Image.FromFile(sourceBFile);
   Bitmap afterMerge = mergeRGB(bitmapRed, bitmapGreen

How to join two sharepoint list in c# by CAML query?

Hii All,
   I am using wss 3.0 and i have one site and site has 4 to 5 lists. lists are interconnected with lookup column and same column. I need to display some column fron one list and some from another.. i need to join that lists by where condition like project =project..

So how can i join??

Thank You

Cannot properly join lists in SPD 2007


Ok, I have been reading all sorts of posts and such for about a week and still have no come up with any concrete answers.


I cannot properly join lists in SP 07. I say properly because I never get the option to select a field to associate one with the other. 

I select "Create new linked data source" from Data Source Library; Pane opens; Left Click "Configure Linked Data Source"; Add 4 to 5 lists from "Current Site"; Select Next; Select Join option but Next is greyed out. Is this supposed to be greyed out because they are lists? Can lists be joined? I see alot of examples on joining databases and excel pages but not too many on lists.

If I select next from the last point, open the linked sources and select my newly created linked source and click to show data, I can see all of the information in there. Problem is I don't believe the lists are really joined by anything since I never received an option for it. 

I also have been reading up on joined subviews but I never receive an option for  joined subview. Is the joined subview the way to go for lists? If so how?


I know these boards are fairly active and any information or help would be greatly appreciated.

merge word document



I recently created a team site on the SharePoint for projects management and our team will use the word document for inserting the information about the project that they work on it,

My case is:

for each project have multiple documents and i created a user control by VS.2005, this user control contain a drop down list contain all projects and merge button, when the user choose any project and click merge i will use the Work dll to merge all document that related to the project and export to the user.

This is my code

private void mergeDocument()


ApplicationClass WordApp =

insert into in combination with inner join


Hi All,

I have my data split in 3 tables for cascading dropdownlists.

How can I make an update statement of this select statement?

SELECT distinct BIER.Naam as naam1, BIER_L2.L2_Naam as naam2, BIER_L3.L3_Naam as naam3
	from BIER, BIER_L2, BIER_L3
	where BIER_L2.L2_ID = BIER.L2_ID and BIER_L2.L3_ID = BIER_L3.L3_ID 



ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend