what is diffrence b/w joner and union transfermation
Answers were Sorted based on User's Feedback
Answer / murali
to join source data from two related heterogeneous sources
residing in different locations or file systems. Or, you
can join data from the same source.
If you need to join more than two sources, you can add more
Joiner transformations to the
You cannot use a Joiner transformation in the following
Either input pipeline contains an Update Strategy
You connect a Sequence Generator transformation directly
before the Joiner transformation.
The Union transformation is a multiple input group
transformation that you can use to merge data from multiple
pipelines or pipeline branches into one pipeline branch.
The Union transformation merges sources with matching ports
and outputs the data from one output group with the same
ports as the input groups.
Similar to the UNION ALL statement, the Union
transformation does not remove duplicate rows.
|Is This Answer Correct ?||16 Yes||1 No|
Answer / nagaraju bhatraju
joiner doesn't require marching ports to join ,
both shoud be from heterogenious sources.
union requires two flows with same no of columns and both
columns of the two flows orders should be same to produce
the combined flow .
|Is This Answer Correct ?||18 Yes||4 No|
Answer / dillip
Joiner transformation is horizental transformation
but union is is vertical trans formation
|Is This Answer Correct ?||4 Yes||1 No|
Answer / chandrp
At the maximum a join trasformation can join only 2 tables.
but union transformation will join more than two tables at
|Is This Answer Correct ?||10 Yes||8 No|
Answer / ashu alle
joiner transformation supports homogenious and
union transformation supports only heterogenious data
|Is This Answer Correct ?||1 Yes||7 No|
Answer / singh.
hello Chandrp . ur answer is wrong.
in my view join T/r can join more than 2 tables
try with 3 flat files. then u will get the result.
|Is This Answer Correct ?||3 Yes||21 No|
How can we use mapping variables in informatica?
In a table there are 1 million records there in which 3 records are duplicate how will you find out those 3 records?
write a query to retrieve the latest records from the table sorted by version(scd)
If my source is having 30 million records, so obviously the cache could not be allocated with sufficient memory. What needs to be done in this case?
What is a candidate key?
Hi, In a mapping I have 3 targets and one fixed width file as source. Total 193 records are there . I connected one port in aggregator to all 3 targets. The same value need to be load into these 3 targets . It is loaded like that only but in different order. Why? The order of insertion should be same know for all 3 targets ? Then why the order is changed ? Any one please help me. Advance thanks.
What are the scheduling options to run a sesion?
what is a transforamation?
if the column name in sql override is diff from the column name in source qualifier,what is the impact?
what is normalizer transformation?
Does an informatica transformation support only aggregate expressions?
1 2 3 * 4 5 6 * 7 8 9 how to load records between two stars(*),