SSIS Merge Join

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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Complex SSIS Lookup/Merge Join Using NK And Dates

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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Aug 10, 2006

Hi,
 I am pretty new to SSIS. I am transferring some rows from 2 source tables to 1 destination table.
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Thanks in advance
Sat
 

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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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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:
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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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Jun 5, 2006

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Nov 7, 2006

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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

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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,

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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,

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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.
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Nov 4, 2005

Hi, folks:

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Apr 30, 2008



Hello,
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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
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    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:
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 A.X  join B.X  order 2
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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
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Please help-me...
Thanks,
André

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Nov 21, 2006

Hi guys! I'm trying to figure out how to join 3 tables, but I can't seem to find a solution. What I want to do is to put table 1, table 2 and table 3 into table_merged.
table_merged = table 1 + table 2 + table 3
 Is it possible to merge tables even if they have different fields?
 
Please help.
Onegai shimasu... 
 
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Mar 27, 2006

i'm merge joining 2 data sources, one is oracle and the other is excel...the problem is in the oracle source, it's a sql statement like:

select hdr.div_ord_no, hdr.mtr_no, hdr.prod_cd
from qctrl_div_ord_header hdr,
(select max(sub.eff_dt_from) min_eff_dt_from, div_ord_no
from qctrl_div_ord_header sub
group by div_ord_no
) tmp
where hdr.eff_dt_from = tmp.min_eff_dt_from
and hdr.div_ord_no = tmp.div_ord_no

having that sql statement, merging will come out with 0 rows

however, having a simple query like:

select hdr.div_ord_no, hdr.mtr_no, hdr.prod_cd
from qctrl_div_ord_header hdr

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i believe this is a problem with SSIS, anyway around this?

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Oct 9, 2006

Hi,

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My original data looks like this:






Pk_ID

Choice1

Choice2

Feedback1

Feedback2


10

a

b

x

y

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Pk_newID

fk_ID

Choice

Feedback


563

10

a

x


564

10

b

y

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fk_ID

Choice

Feedback


563

10

a

x


564

10

a

y


565

10

b

x


566

10

b

y

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Thanks

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Jan 10, 2008

I am trying to use the merge join example in the following link. To import new records only.

http://www.sqlis.com/311.aspx

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I created a dummy table in SQL and executed the same join and I always get the right answer. What the heck could be wrong?

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Please help this is driving me nuts.

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Mar 30, 2007

Hi, I'm using a Merge Join Component of Inner Join type to retrieve from the right pipeline some records to append to the ones coming from left pipeline according to the join citerias defined on the compnent.
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In the following I'll try to do an axample.

LF pipeline:
Column0 Column1 Column2
1 aaaa aa11
2 bbbb bb11
3 cccc cc11
4 dddd dd11

RT pipeline:
ColumnA ColumnB
1 aa22
4 dd22

On exiting from the MergeJoin, defining €œColumn0€? for LT as join key and €œColumnA€? for RT and as output data all the columns of the LT pipeline and the only ColumnB from the RT pipeline it should be obtained the following records:

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4 dddd dd11 dd22

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3 cccc cc11

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What I need to know is which are these last lines because I need to manage them.
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Oct 19, 2007


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Nov 7, 2006

I've run into something that looks like a bug to me but I wanted to run it by the board:

Merge join 2 sorted tables.

Table1: ColumnA : Sort Order 1, ColumnB Sort Order 2

Table2 : ColumnA: Sort Order 1, ColumnB Sort Order 2, ColumnC not sorted

Merge Join the two tables on ColumnA and ColumnB...

Choose the following as output columns

A + B + C = works

C = works

A + C = works

B + C = NOT work.. error message: The column with the SortKeyPosition value of 0 is not valid. It should be 2. 


Basically if you choose one or more of the sorted columns in the output at least one of them has to be the column with Sort position 1 or you'll get that error. 

Is this a bug or intentional?  If you do not have sort column 1 in the output that output could no longer be considered sorted... so perhaps the error is related to that (instead of error I'd expect some warning about the sorting).  Interesting that it lets you choose C only becuase that also makes the output unsorted.

 

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Mar 15, 2006

Hello,
I've got a problem with the merge join operator.

I'm trying to Join two tables using a left outer join.

Here are my tables :

TABLE AGENT
AGENT_CODE; REGION_ID; COUNTRY_ID
AA;01;01;
BB;01;01;
CC;01;02;
CC;02;02;
DD;01;01;

600 records in this table.

TABLE DELEGUE
AGENT_CODE; FIRST_NAME; LAST_NAME
AA; Maradona;Diego;
BB; Maradona;Diego;
DD; Zidane;Zinedine;

145 records in this table.

This is what i expect in my left outer join:
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AA;01;01;Maradona;Diego;
BB;01;01;Maradona;Diego;
CC;01;02;NULL;NULL
CC;02;02;NULL;NULL;
DD;01;01;Zidane;Zinedine

600 records in the destination table, with only 145 Not null first_name and last_name



The
issorted property has been set to true in the 2 sources tables, the
numkeyscolumns property is set to 1, and the join keys are both checked.
When i execute the sql query using the editor in sql server, the result is good, i've got what i've expected.
But
when i run the dataflow, the destination has got 600 records, but the
columns FIRST_NAME and LAST_NAME are not null only 8 times, the 592
other lines are NULL.
Could someone explain to me why i lost 145-8=137 FIRST_NAME and 145-8=137 LAST NAME ?
Thank you in advance.

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Nov 7, 2006

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I saw the merge join in SSIS and used it to get data from two of the tables and stick them in the destination and it all worked fine.

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Nov 16, 2006

Hi, All,



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May 5, 2006

All,

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Hi,

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Hi,
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I am only concerned about 3 common fields (Name, Date and Wages)

I have joined EmpName with MgrName, Hiredate with Date_Started, but when I select Wages in correspondence to Salary, it shows me the following error

===================================

Error at Manager_Detail [Merge data with adjustments (Salary) [11668]]: The metadata for "input column "Wages" (13852)" does not match the metadata for the associated output column.

Error at Manager_Detail [Merge data with adjustments (Salary) [11668]]: Failed to set property "OutputColumnLineageID" on "input column "Wages" (13852)".

(Microsoft Visual Studio)


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