Answer / rajeshchunduri

In lookup stage reject link gets data of unmatched primary.
wear as in merge secondry unmatched data comes to reject
link. merge supports n-1 reject links

Answer / xxx

In Lookup reject link we can capture the source rejected
data.

In merge reject link we can capture updated table rejected
data.

Answer / kiran

Reject link is a reject link in both merge and lookup
stage. I guess the interviewer is not sure about this
question. The difference between lookup and mergre stages
in terms of reject links is lookup allows single reject
while merge allows as many reject links as the update links
in the source. so Lookup---> single reject link, Merger--->
Multiple reject links.

Answer / dilip anand k

Look up has one Primary input and several reference inputs
and it supports an optional reject link that captures the
unmatched data looked up in the primary. (Rejected data in
the primary input and not the referential links)

Merge stage has one Master input and several update
datasets and it has a reject link for each update link
specified. So if we have ‘n’ no of update datasets then the
stage supports ‘n’ no. of reject links to capture the
unmatched records of the update link.

Answer / ashok

lookup support only one reject link.
merge support zero or n-1 reject links.

Answer / sravanthi agarwal w/o.sai sat

In Lookup stage we can capture the primary reject data
(input link to the lookup) and its only 1 link..


In case of Merge stage we can capture secondary rejected
data(depends on update links to the merge stage) and its
depends on update link count.....

Answer / vijaya

Hi

The lookup stage contain one primary link and another
ref.link the reject link will have unmatched records of
primary link.where as in merge stage contain one master link
all update links the reject link will have unmatched records
of update link.

Answer / shar

Well
The prime difference is
lookup reject link can collect all unmatched primary mismatched data.
Where as
in merge stage, using reject link(s) it will allow us to identify from which update datasets records got rejected.
n in addition to this as we know
lookup supports only one reject link and merge supports as many no. of updates so many no. of reject links.
thats it.

Answer / narayana

what is the difference between lookup stage reject link and
merge stage reject link in datastage Parallel jobs? interm
of output in Merge Reject link and Look Up Reject link ?

eno ename 1 qaz 1 wsx 1 edc 2 zxc 2 asd 3 qwe 3 wer 3 tru 4 rgj Output: eno ename count 1 qaz,wsx,edc 3 2 zxc,asd 2 3 qwe,wer,tru 3 4 rgj 1 I want the above output to be solved by DataStage as well and I have to write SQL query for the same output.

4 Answers   Wipro,

Is it possible to query a hash file?

0 Answers   IBM,

What is a merge in datastage?

0 Answers  

There are two file are there .1st file contains 5 records and 2nd file contain 10 records in target they want 50 records.how can achieve this

0 Answers   IBM,

What are the prerequisites for join stage

2 Answers  

Difference between server jobs & parallel jobs?

0 Answers  

Does datastage support slowly changing dimensions ?

0 Answers  

Can aggregator and transformer stages use to sort the data? How ?

2 Answers  

what is stage is used for below Input columns: dept|mgr|employee|salary Output columns: mgr|count of employee per mgr|avg salary per dept note: each dept has one mgr and each mgr has many employees

0 Answers  

I HAVE EMP TABLE, 4 COLS R THERE COL1,COL2,COL3,COL4 ID-- 101,102,103,104 SAL-- 1000,4000,2000,5000 DATE-- COLUMN. I WANT TO DISPLAY THE DATA PREVIOUS MONTH HIGEST SAL ?

2 Answers   Wipro,

How can we run same job in 1 day 2 times

4 Answers   IBM,

can we use sequential file as a lookup

7 Answers   Cognizant, Wipro,