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Hi Friends,
I have a input data like,
class_id Marks
101 50
101 60
101 40
102 90
102 35
And i want my output data like
class_id Marks Rank
101 50 2
101 60 1
101 40 3
102 90 1
102 35 2
how to do this in datastage?
- 8 Answers
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Answer / ankit gosain
Hi friends,
This question is a trick and as i found in every answer
given previously, there is a slight miss-queue.
Check out my solution for this question:
I/p File(Primary)
!
I/p
file---->Sort---->Sort---->transformer---->join/lookup---->O/p
File
(1). In the first sort stage, make class_id and marks fields
as keys, sort by descending and then create a Key change column.
(2). In second sort stage, make class_id only as a key
(don't sort previously sorted) and create a cluster key
change column.
(3). You will get the o/p as given below:
Class_Id, Marks, KeyChange, ClusterKeyChange
102,90,1,1
102,35,1,0
101,60,1,1
101,50,1,0
101,40,1,0
(4). In transformer stage take a integer type variable say
var1 and create one column say Rank.
Now, derive Var1 as :
if ClusterKeyChange=1 then 1 else Var1
And, derive Rank as :
if ClusterKeyChange=1 then 1 elseif (ClusterKeyChange=0 and
KeyChange=0) then Var1 else Var1+1
(5). Take only class_id, marks & rank as an o/p of the
transformer, so that you will have the o/p as given below:
Class_id, Marks, Rank
102,90,1
102,35,2
101,60,1
101,50,2
101,40,3
(6). Now finally, apply join/lookup and take this o/p as a
Reference data and Primary data will be the Source I/p File.
Take Class_id and Marks as keys and derive Rank to the o/p,
so that you will get the finally o/p as given below:
class_id Marks Rank
101 50 2
101 60 1
101 40 3
102 90 1
102 35 2
If you have any other doubt, you can mail me at
ankitgosain@gmail.com
Cheers,
Ankit :)
| Is This Answer Correct ? | 7 Yes | 1 No |
Answer / shar
If you think ur solution is correct just try out with below
input and recheck ur solution..
class_id,Marks
101,50
101,60
101,60
101,50
101,40
102,90
102,90
102,35
102,35
| Is This Answer Correct ? | 4 Yes | 0 No |
Answer / indu
Input->Sort1->Sort2->Trnsformer->Output
Sort1-->Declare class_id and Marks as key column and sort
in descding order.
Sort2-->Declare class_id and Marks as key column(Sort Mode
to Dont sort previously sorted for both) and set clustered
key change column to true.
Otuput for Sort 2 will be
class_id Marks Rank
102 90 1
102 35 0
101 60 1
101 50 0
101 40 0
In the Transformer declare stage variable temp and
initialize to o
Derive temp--> If Rnak=1 then Rank else temp+1
Derive output columns as --->
class_id ---> class_id
Marks ----> Marks
Rank----> temp
| Is This Answer Correct ? | 13 Yes | 10 No |
Answer / ankit gosain
Hi friends,
This question is a trick and as i found in every answer
given previously, there is a slight miss-queue.
Check out my solution for this question:
I/p File(Primary)
!
I/p
file---->Sort---->Sort---->transformer---->join/lookup---->O/p
File
(1). In the first sort stage, make class_id and marks fields
as keys, sort by descending and then create a Key change column.
(2). In second sort stage, make class_id only as a key
(don't sort previously sorted) and create a cluster key
change column.
(3). You will get the o/p as given below:
Class_Id, Marks, KeyChange, ClusterKeyChange
102,90,1,1
102,35,1,0
101,60,1,1
101,50,1,0
101,40,1,0
(4). In transformer stage take a integer type variable say
var1 and create one column say Rank.
Now, derive Var1 as :
if ClusterKeyChange=1 then 1 else Var1
And, derive Rank as :
if ClusterKeyChange=1 then 1 elseif (ClusterKeyChange=0 and
KeyChange=0) then Var1 else Var1+1
(5). Take only class_id, marks & rank as an o/p of the
transformer, so that you will have the o/p as given below:
Class_id, Marks, Rank
102,90,1
102,35,2
101,60,1
101,50,2
101,40,3
(6). Now finally, apply join/lookup and take this o/p as a
Reference data and Primary data will be the Source I/p File.
Take Class_id and Marks as keys and derive Rank to the o/p,
so that you will get the finally o/p as given below:
class_id Marks Rank
101 50 2
101 60 1
101 40 3
102 90 1
102 35 2
If you have any other doubt, you can mail me at
ankitgosain@gmail.com
Cheers,
Ankit :)
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / ankit gosain
Hi friends,
This question is a trick and as i found in every answer
given previously, there is a slight miss-queue.
Check out my solution for this question:
I/p File(Primary)
!
I/p
file---->Sort---->Sort---->transformer---->join/lookup---->O/p
File
(1). In the first sort stage, make class_id and marks fields
as keys, sort by descending and then create a Key change column.
(2). In second sort stage, make class_id only as a key
(don't sort previously sorted) and create a cluster key
change column.
(3). You will get the o/p as given below:
Class_Id, Marks, KeyChange, ClusterKeyChange
102,90,1,1
102,35,1,0
101,60,1,1
101,50,1,0
101,40,1,0
(4). In transformer stage take a integer type variable say
var1 and create one column say Rank.
Now, derive Var1 as :
if ClusterKeyChange=1 then 1 else Var1
And, derive Rank as :
if ClusterKeyChange=1 then 1 elseif (ClusterKeyChange=0 and
KeyChange=0) then Var1 else Var1+1
(5). Take only class_id, marks & rank as an o/p of the
transformer, so that you will have the o/p as given below:
Class_id, Marks, Rank
102,90,1
102,35,2
101,60,1
101,50,2
101,40,3
(6). Now finally, apply join/lookup and take this o/p as a
Reference data and Primary data will be the Source I/p File.
Take Class_id and Marks as keys and derive Rank to the o/p,
so that you will get the finally o/p as given below:
class_id Marks Rank
101 50 2
101 60 1
101 40 3
102 90 1
102 35 2
If you have any other doubt, you can mail me at
ankitgosain@gmail.com
Cheers,
Ankit :)
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / abhay agrawal
Source--Tx--Target
In Tx have 5 Stage Variables:
PreSID
CurrSID
PreMarks
CurrMarks
Rank
CurrSID=>PreSID
Input Sid=>CurrSID
CurrMarks=>PreMarks
Input Mark=>CurrMarks
If CurrSID=PreSID then If CurrMarks=PreMarks then Rank Else Rank+1 Else 1=>Rank
Take Rank as output column, let me know if any clarificationneeded.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / anki_sri
Src>> Sort1 >> Sort2 >> Transfrmr >> Trgt
Sort1 --> sort with class_id and marks as well.
Sort2 --> declare key as id and select Dont Sort(Previously Sorted) and set create cluster key change column as True.
Transfrmr --> set two stage variables.
StageVar1=If Clusterkeychange=1 then Clusterkeychange else StageVar+1
StageVar=StageVar1
Create a new row as rank in transfrmr output and map StageVar1 to rank
| Is This Answer Correct ? | 3 Yes | 8 No |
Answer / amulya kumar panda
you are use
transformer if (Marks > 50 or 40 <Marks ) then rank=2 else
if Marks > 60 then rank=1 else rank=4
| Is This Answer Correct ? | 1 Yes | 7 No |
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