Problem Using Merge Join Transformation In Sql Server 2005(SSIS)
Aug 10, 2006
Hi,
I am pretty new to SSIS. I am transferring some rows from 2 source tables to 1 destination table.
The 2 source tables have 1000 rows.They act as the 2 inputs to a merge join transformation where i perform the join between the 2 tables based on a couple of fields. But for some reason the output of the merge join gives me about 1018 rows .Shouldnt the destination also have only 1000 rows?
How do i solve tis problem?
Thanks in advance
Sat
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May 22, 2015
I have two xml source and i need only left restricted data.
how can i perform left restricted join?
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Apr 17, 2008
Hi,
i have 2 input files,those are sorted on account no field , i use to merge these 2 files data into 1 file.i took merge join trans.... with inner join but i didn't get the output fields ,plz help me regarding this issue.......
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Nov 10, 2006
I have serached through this forum, and I could not find the solution.
My SSIS data flow is a simple one. Extracting two tables from Oracle using OLE DB Source , join them together using merge join and loading into a table in SQL server by SQL Server Destination.
I haven't gone through this simple procedure because Merge join always hangs there. Down to further investigation, I found one input (randomly one of two inputs) is always stuck. Sometimes the input is empty, sometimes is about half way.
Is there workround to see what is happening there and to fix this problem?
TIA
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Aug 4, 2009
I am using SSIS in SQL Server Enterprise 2005. I have two OLE DB data sources from two disparate databases (IBM DB2 and Microsoft SQL Server), some columns from each of which are to be included in the merged output results. I have noted the various requirements in the forum postings with regard to sorting the OLE DB sources and specifying the output source columns as being sorted, as well as the requirement that the join fields in the two sources be close/exact matches. Yet, when I run this in VS, while the work area reflects the expected number of rows being input into the Merge Join transformation, no count is reflected as output from that transformation into the final destination table.Specifically, my two data sources (IBM DB2 and MS SQL) are configured as follows:
IBM DB2 contains an SQL statement that uses Cast operations to create the result columns.and an ORDER BY clause to ensure that the output is sorted by the desired two columns.. The OLE DB source property setting for IsSorted is set to true; the Output Columns folder column definitions for "key_ source_dtsy" and "key_source_dtrt" have their SortKeyPosition properties set to 1 and 2, respectively. Those field are both defined as data type DT_STR, with lengths of 4 and 2, respectively. Below is the Path metadata from the Data Flow Path editor from the path from this source:
IBM DB2 source"Name"Â "Data Type"Â "Precision"Â "Scale"Â "Length"Â "Code Page"Â "Sort Key Position"Â "Comparison Flags"Â "Source
Component""ID_CODE"Â "DT_STR"Â "0"Â "0"Â "10"Â "1252"Â "0"Â ""Â "Source F0005 User Defined Codes""CODE_DESCR_1"Â "DT_STR"Â "0"Â "0"Â "30"Â "1252"Â "0"Â ""Â "Source F0005 User Defined Codes""CODE_DESCR_2"Â "DT_STR"Â "0"Â "0"Â "30"Â "1252"Â "0"Â ""Â "Source F0005 User Defined Codes""key_source_dtsy"Â "DT_STR"Â "0"Â "0"Â "4"Â "1252"Â "1"Â ""Â "Source F0005 User Defined Codes""key_source_dtrt"Â "DT_STR"Â "0"Â "0"Â "2"Â "1252"Â "2"Â ""Â "Source F0005
User Defined Codes:
MS SQL contains an SQL statement that takes the columns as they are in the MS SQL table (no Cast operations needed); it also uses an ORDER BY clause to ensure the output is sorted by the join columns. The OLE DB source property setting for IsSorted is set to true; the Output Columns folder columns for "key_source_dtsy" and "key_source_dtrt" have their SortKeyPosition properties set to 1 and 2, respectively. Those field are both defined as data type DT_STR, with lengths of 4 and 2, respectively. Below is the Path metadata from the Data Flow Path editor from the path from this source:
MS SQL source"Name"Â "Data Type"Â "Precision"Â "Scale"Â "Length"Â "Code Page"Â "Sort Key Position"Â "Comparison Flags"Â "Source Component""id_code_name"Â "DT_I2"Â "0"Â "0"Â "0"Â "0"Â "0"Â ""Â "Source CodeName in db dwVdFY""key_source_dtsy"Â "DT_STR"Â "0"Â "0"Â "4"Â "1252"Â "1"Â ""Â "Source CodeName in db dwVdFY""key_source_dtrt"Â "DT_STR"Â "0"Â "0"Â "2"Â "1252"Â "2"Â ""Â "Source CodeName in db dwVdFY"
The Merge Join transformation specifies an INNER JOIN using the columns named "key_source_dtsy" and "key_source_dtrt" from the respective data sources.I know there are alternative ways of accomplishing my intent (Lookup, port MS SQL table to IBM DB2 so join can occur in SELECT statement, etc.; however, I'd like to use this functionality and assume that it should work.Â
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Aug 27, 2012
Can the collation used by SSIS be changed or influenced during install or run time? We have found that our databases, that use a mandatory "LATIN1_GENERAL_BIN", have incorrect SSIS Merge Join output. Changing our database collation in testing didn't make a difference. What matters is the data. Which Windows collation is SSIS using?
Example Data:
FIRSTNAME
FIRSTNAME
FIRSTS-A-NAME
FIRSTS_A_NAME
FIRST_NAME
FIRST_NAME
FIRSTname
FIRSTname
FIRS_NAME
put in a Sort task before the Merge Join task as setting advanced properties isn't enough (as described by Eric Johnson here --> [URL] ......
We are using 64-bit SQL Server 2008 R2 w/ SP1 in Windows Server 2008 R2 ENT w/ SP1.
UPDATE from ETL team: Explicitly ordering the source with "COLLATE Latin1_General_CS_AS" seems to have the same effect as using a separate sort task. We don't feel that we can rely on our findings, however, unless we have documentation that this collation is what is behind SSIS.
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Jul 12, 2006
hi all,
My issue is the inner join transformation in SSIS.
See i ll explain my problem clearly now.....
Actually i m just checkin if the inner join performed in business intelligence studio usin the inner join transformation and the inner join performed in the management studio using queries are same. Logically both the resultset should match isn't but in my case it is not so. It is very important for me to figure out where the problem is because i m goin to use lotsa inner join transformations in my current project.
I ll appreciate if someone can help me to figure out this problem. May be you can also tell me the detailed steps in adding the inner join transformation and also how it works.
Thank you,
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Mar 6, 2008
I am working on an ssis package and i find an problem while using the merge join for merging 2 OLEDB Data sources .
data source 1 is : - The table formed my an sal server comand , that out put is given to a multicast since i want to sare that output amoung 2o other tables.
So the the left input for the merge join is OLEDB source , which contains direct data from source table
I am usong Inner join on one column
The problem is i am not getting the expected rows as out put of merge .
I tried to join the two tables in sqlserver query window and i am getting expected result
What could be the problem
The first table is
Reservations.ReservationManual
second table is Out put of the following query
Select Distinct B.ReservationID as R
from Property.Main A ,Reservations.Reservations B ,Reservations.ReservationRooms C
Where
A.propertyID = B.PropertyId And
C.ReservationID = B.ReservationID And
getdate() >=C.Until +A.ReservationOffLineDays
i am not getting the expected result here in SSIS package merge join
But if i try to execute the following in query editer in management studio i am getting the expected result !!
declare @temp as table
(ResID Varchar(50)
)
Insert into @temp
(ResID)
Select Distinct B.ReservationID as R
from Property.Main A ,Reservations.Reservations B ,Reservations.ReservationRooms C
Where
A.propertyID = B.PropertyId And
C.ReservationID = B.ReservationID And
getdate() >=C.Until +A.ReservationOffLineDays
select * from Reservations.ReservationManual A , @temp b
Where A.reservationID = b.resID
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Feb 7, 2006
I had this (what seems to be a) simple question asked today and I'm afraid I didn't like my answer. Does anyone know the proper answer to this one:
Any ideas on how I can constrain a lookup or merge join based on the dimension row's effective and expired dates so three criteria are needed as follows:
1. DataStagingSource.ModifyDate < DataWarehouseDimension.RowExpiredDate AND
2. DataStagingSource.ModifyDate >= DataWarehouseDimension.RowEffectiveDate AND
3. DataStagingSource.NaturalKey = DataWarehouseDimension.NaturalKey
-- Brian
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Jan 20, 2006
Setup:
I need to run an Insert query which pulls data from a table located on server A database AA Table AAA conditional on (or JOINED with) Table BBB in database BB sever B. In SQL 2000 it could be done as:
From Server A:
sp_addlinkedserver B
INSERT dbo.ResultsTable
SELECT SourceTable.* FROM B.BB.dbo.BBB SourceTable
INNER JOIN A.AA.dbo.AAA ConditionTable ON SourceTable.RecID = ConditionTable.RecID
sp_dropserver B
In SSIS one of the possible solutions is to use a package which does the following:
OPEN A + OPEN B-> SORT A + SORT B->MERGE JOIN A and B->OUTPUT RESULT
The problem with this approach is that it's extremely slow for large datafiles (50M records each)
Questions:
1) In the procedure above could the SORT step be avoided?
2) Is there another approach to run cross-servers JOIN in SSIS?
Thank you
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Aug 10, 2007
Scenario:
OLEDB source 1
SELECT ...
,[MANUAL DCD ID] <-- this column set to sort order = 1
...
FROM [dbo].[XLSDCI] ORDER BY [MANUAL DCD ID] ASC
OLEDB source 2
SELECT ...
,[Bo Tkt Num] <-- this column set to sort order = 1
...
FROM ....[dbo].[FFFenics] ORDER BY [Bo Tkt Num] ASC
These two tasks are followed immediately by a MERGE JOIN
All columns in source1 are ticked, all column in source2 are ticked, join key is shown above.
join type is left outer join (source 1 -> source 2)
result of source1 (..dcd column)
...
4-400-8000119
4-400-8000120
4-400-8000121
4-400-8000122 <--row not joining
4-400-8000123
4-400-8000124
...
result of source2 (..tkt num column)
...
4-400-1000118
4-400-1000119
4-400-1000120
4-400-1000121
4-400-1000122 <--row not joining
4-400-1000123
4-400-1000124
4-400-1000125
...
All other rows are joining as expected.
Why is it failing for this one row?
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Feb 5, 2007
I've gote 2 Tables with about 50.000 rows and I left outer join them with MERGE JOIN.
The result are 9999 rows. Has anybody got the same problem. Maybe it's a bug!?
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Jun 5, 2006
I have a merge join (full outer join) task in a data flow. The left input comes from a flat file source and then a script transformation which does some custom grouping. The right input comes from an oledb source. The script transformation output is asynchronous (SynchronousInputID=0). The left input has many more rows (200,000+) than the right input (2,500). I run it from VS 2005 by right-click/execute on the data flow task. The merge join remains yellow and the task never finishes. I do see a row count above the flat file destination that reaches a certain number and seems to get stuck there. When I test with a smaller file on the left it works OK. Any suggestions?
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Apr 23, 2008
I am trying to use a merge transformation task and receiving an error that I don't know how to troubleshoot further. Could I please have some advice on what else to look at to try to resolve the problem.
The error message text is: Error at Data Flow Task [Merge [1245]]: The metadata for "input column "LOCATION" (5451)" does not match the metadata for the associated output column
I have looked at the metadata and cannot see any differences: the following is output from the data flow path.
Name Data TypePrecisionScaleLengthCode PageSort Key PositionSource Component
ACCOUNT DT_STR 0 0 6 1252 1 Sort - FinSysData
PROGRAM DT_STR 0 0 6 1252 2 Sort - FinSysData
LOCATION DT_STR 0 0 6 1252 3 Sort - FinSysData
PROJECT DT_STR 0 0 6 1252 4 Sort - FinSysData
SUBPROJECTDT_STR 0 0 2 1252 5 Sort - FinSysData
ACTIVITY DT_STR 0 0 6 1252 6 Sort - FinSysData
FUNDING DT_STR 0 0 3 1252 7 Sort - FinSysData
CLIENT DT_STR 0 0 6 1252 8 Sort - FinSysData
NTWAGE DT_STR 0 0 3 1252 9 Sort - FinSysData
TYPE DT_STR 0 0 1 1252 10 Sort - FinSysData
PERIOD DT_STR 0 0 6 1252 11 Sort - FinSysData
CO DT_STR 0 0 2 1252 12 Sort - FinSysData
FIN_YEAR DT_I4 0 0 0 0 13 Sort - FinSysData
BALANCES DT_R8 0 0 0 0 14 Sort - FinSysData
Name Data TypePrecisionScaleLengthCode PageSort Key PositionSource Component
ACCOUNT DT_STR 0 0 6 1252 1 Sort - DataWarehouse
PROGRAM DT_STR 0 0 6 1252 2 Sort - DataWarehouse
LOCATION DT_STR 0 0 6 1252 3 Sort - DataWarehouse
Project DT_STR 0 0 6 1252 4 Sort - DataWarehouse
SubProjectDT_STR 0 0 2 1252 5 Sort - DataWarehouse
Activity DT_STR 0 0 6 1252 6 Sort - DataWarehouse
Funding DT_STR 0 0 3 1252 7 Sort - DataWarehouse
Client DT_STR 0 0 6 1252 8 Sort - DataWarehouse
NTWage DT_STR 0 0 3 1252 9 Sort - DataWarehouse
TYPE DT_STR 0 0 1 1252 10 Sort - DataWarehouse
Period DT_STR 0 0 6 1252 11 Sort - DataWarehouse
CO DT_STR 0 0 2 1252 12 Sort - DataWarehouse
Fin_Year DT_I4 0 0 0 0 13 Sort - DataWarehouse
Balance DT_R8 0 0 0 0 14 Sort - DataWarehouse
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Jul 16, 2015
Why Merge Transformation Need to Sorted Inputs?
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Nov 7, 2006
Is there a way to do a super-table join ie two table join with no matching criteria? I am pulling in a sheet from XL and joining to a table in SQLServer. The join should read something like €œfor every row in the sheet I need that row and a code from a table. 100 rows in the sheet merged with 10 codes from the table = 1000 result rows.
This is the simple sql (no join on the tables):
select 1.code, 2.rowdetail
from tblcodes 1, tblelements 2
But how to do this in SSIS?
Thanks - Ken
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May 6, 2008
I read that merge joins work a lot faster than hash joins. How would you convert a hash join into a merge join? (Referring to output on Execution Plan diagrams.)
THANKS
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Nov 21, 2007
Hello,
I have the following Datawarehouse problem (SQL Server 2005 and SSIS 2005):
2 Fact tables and both with some foreign surrogate keys of dimensions (some of them with common dimensions, other with different dimensions).
I have to create another FACT table that is an aggregation and join table between the 2 ones.
How can I do?
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Jul 30, 2015
I have flat file source from which data is imported to a Sql table.The target column is int and input column is string .The column has some numeric values and some blank values.when I tried to convert into int values it fails.
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May 16, 2008
In SQL Server 2000, i'm using Data Transformation Services. What a similar DTS tools in SQL Server 2005.
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Sep 1, 2006
Does anyone have a clue as to why DT_R4, DT_R8 are not allowed as join columns? This means I cannot join tables on AccountNumbers, InvoiceNumbers, etc. What a pain...
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Jun 27, 2007
Hi Does anyone have any information on how I can due a XSLT Transformation on XML Data Stored in SQL Server 2005?Thanks for the helpBones
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Jan 24, 2007
Hi,
Is there any way to measure bandwith usage during merge replication between sql server 2005 and sql server mobile 2005 running on a cradled wm5 mobile device.
Attaching the windows performance monitor to the network connection established over usb would work although I was wondering if there was something specific for this case integrated into Sql server 2005 / sql server mobile 2005 / Sql server management studio / third party tools that i could use ?
thnx,
pdns.
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Jul 11, 2007
Hello everybody!
I hope that someone could help me.
I have a problem when i start sincronyzing with the emulator of MSVS2005 to SQL2005 in Windows Vista. I have the same program in the emulator, but sincronyzing with windows XP Pro and no problem...
I configure the connection to use the IUSR.
The source code that i use:
repl.InternetUrl = @"http://laptop/SQLMobileIIS/sqlcesa30.dll";
repl.Publisher = @"laptop";
repl.PublisherDatabase = @"database";
repl.PublisherSecurityMode = SecurityType.NTAuthentication;
repl.Publication = @"Pubdatabase";
repl.Subscriber = @"SQLMobile";
repl.SubscriberConnectionString = @"Data Source='" + nomeFicheiroBD + "';Password='3409'";
The error that returns is:
"Failure to connect to SQLServer with provided connection information. SQL Server does not exist, access is denied because the IIS user is not a valid user on the SQL Server, or the password is incorrect"
Does anybody knows what i can do?
HELP I NEED SOMEBODY TO HELP!
Thanks!
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Apr 10, 2008
I have written following code in my application
I just want to display all the data of a Single table into a Data Grid, I know that we can drag and drop the table on to a form and datagrid is generated, but here I want to retrive those values through my code, how should i do that
I am getting following errors while running the program
Error 1) Error No. 28037, MS SQL Server 2005 Evrywhere Edition
Error: A request to send data to the computer running IIS has failed. For more information see HRESULT
Error 2) Error No. 0, SQL Server 2005 Evrywhere Edition ADO.Net Data Provider
Error: The specified table does not exist [ JobLists ].
Can anybody please tell me, where I went wrong ??? In this code anywhere else????
Note: While adding a Data Source of SQL Server 2005 Mobile Edition, I have added that .sdf file into my project, thats why I have written the Data Source as : .DbFile.sdf
@"Data Source = .DbDotNetCF.sdf";
The code is as follows:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlServerCe;
namespace DeviceApplication1
{
public partial class Form1 : Form
{
string filename = @".DbDotNetCF.sdf";
private DataSet dsJobLists;
public Form1()
{
InitializeComponent();
}
private void DeleteDB()
{
if (System.IO.File.Exists(filename))
{
System.IO.File.Delete(filename);
}
}
private void Sync()
{
SqlCeReplication repl = new SqlCeReplication();
repl.InternetUrl = @"http://localhost/WebsiteDotNetCF/sqlcesa30.dll";
repl.Publisher = @"RAHU";
repl.PublisherDatabase = @"DotNetCF";
repl.PublisherSecurityMode = SecurityType.NTAuthentication;
repl.Publication = @"PubDotNetCF";
repl.Subscriber = @"SubDotNetCF";
repl.SubscriberConnectionString = @"Data Source='" + filename + "';Max Database Size=128;Default Lock Escalation =100;";
try
{
if (!System.IO.File.Exists(filename))
{
repl.AddSubscription(AddOption.CreateDatabase);
}
repl.Synchronize();
}
catch (SqlCeException ex)
{
DisplaySQLCEErrors(ex);
}
finally
{
repl.Dispose();
}
// Display Same Data In Another DataGrid : dataGrid1
SqlCeConnection cn = new SqlCeConnection(@"Data Source='" + filename + "'");
SqlCeDataAdapter daJobLists = new SqlCeDataAdapter("SELECT JobListsID, JobID, PersonID FROM JobLists", cn);
if (dsJobLists == null)
{
dsJobLists = new DataSet();
}
try
{
dsJobLists.Clear();
daJobLists.Fill(dsJobLists, "JobLists");
dataGrid1.DataSource = dsJobLists.Tables["JobLists"];
}
catch (SqlCeException ex)
{
DisplaySQLCEErrors(ex);
}
}
private void DisplaySQLCEErrors(SqlCeException ex)
{
for (int i = 0; i < ex.Errors.Count; i++)
{
MessageBox.Show("Index #" + i.ToString() + ""
+ ex.Errors.Source + ""
+ "Error: " + ex.Errors.Message,
"Error No. " + ex.Errors.NativeError.ToString());
}
}
private void Form1_Load(object sender, EventArgs e)
{
Sync();
DeleteDB();
if (DbDotNetCFDataSetUtil.DesignerUtil.IsRunTime())
{
// TODO: Delete this line of code to remove the default AutoFill for 'dbDotNetCFDataSet.JobLists'.
this.jobListsTableAdapter.Fill(this.dbDotNetCFDataSet.JobLists);
}
}
}
}
I have created a merge replication correctlly( I suppose, there were no errros)
Please help
Your help will be appriciated
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Apr 26, 2004
I have got a query in which a merge join is 99% of the cost .... and I am confused ... is not merge join supposed to be the fastest ??? Anyone seen this before ???
Any ideas why this could be happening ... and sorry ... do not ask me to post the code coz I will not be able to ...
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Mar 3, 2008
Hi, all experts here,
Any advices for when will be a better way of using Merge join instead of other options?
Thank you very much and I am looking forward to hearing from you shortly.
Best regards,
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May 5, 2006
All,
I need to use Merge Join transformation to join two sources. One is from a PIVOT transformation and one of the output columns is ISSORTED, the other is from an OLE DB Source using a query. The Merge Join transformation requires both input source have to be sorted. I cannot find the ISSORTED property on the OLE DB Source!!
I tried to use Derived/ copy transformations but cannot find the property also. How can set the OLE query sorted in order to use the MergeJoin?
Thanks a lot
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Jun 15, 2007
Hello all,
I have a package where I use merge join for two sorted inputs and the output is stored in a raw file.
In another package, the raw file from above package is again merge joined with another sorted input. Now my question is....do we need to sort again the raw file from first package? or is it OK to set the isSorted property to True and define the sort keys?
Thank you.
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Dec 17, 2007
I am new to this SSIS.
I have a simple join query like this
select a.id from tbl_a a, tbl_b b where a.id = b.id and I want insert the result to my temp table.
the query results is 1500 rows.
but when I use merge join in SSIS, it only inserts to my temp table 4 rows.
I use inner join and I already set the IsSorted to true and specify the sort position for the columns in both source tables
In tbl_a, there are one million rows, in tbl_b, there are 2000 rows.
I don't know why the merge join cannot work out my task.Is there other way that I can just run this simple join query in SSIS to copy the data?
Please help, thanks in advance.
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Apr 30, 2008
Hello,
I have a Merge Join transformation and when i sort values in OLEDB source the merge join fails, but if i use a sort transformation it works! Why??
Best regards,
Fred
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Sep 29, 2006
Hi,
I have a SQL Statatment:
SELECT * FROM TABLE1 AS A
JOIN TABLE2 AS B
ON A.X= B.X
AND A.Y= B.Y
When i execute this code in sql server returns 549 lines. I created a package with two oledb sources one for each table, sorted the tables with fields X and Y after placed a Merge Join with the fields:
A.Y join B.Y order 1
A.X join B.X order 2
both fields with the Join Key checked
But my package return 411 lines.
What's happened?? :(
When a i have the code:
SELECT A.X, A.Y, B.X, B.Y
FROM TABLE1 AS A
JOIN TABLE2 AS B
ON A.X= B.X
When i did the join only one field SSIS worked fine, sql server returns 622 and SSIS returns 622 lines.
Please help-me...
Thanks,
André
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