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create a job to get the previous row salary for the current row.if there is no previous row exists for the current row,then the previous row salary should be displayed as null?
empid salary previoussalary
10 1000 null
20 2000 1000
30 3000 2000
40 4000 3000
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Answer / venkata ramana
Input:Seq file
empid,salary
10,1000
20,2000
30,3000
40,4000
Sequential file stage--->Trasformar Stage---->Dataset Stage
Transformation Logic:
InputTab-->Partition--> select "same"---> Select "Perform Sort" on key "empid"
Declaration of Stage Variables:
PrevSal Varchar ( Set right Intial value ' ' i.e Null value)
CurSal Varchar
Derivation Stage Variables
---------- ---------------
CurSal PrevSal
Linkname.Salary CurSal
Derivation Column name
--------- -----------
Linkname.empid empid
Linkname.Salary Salary
PrevSal previoussalary
Output DataSet result:-
empid salary previoussalary
10 1000 null
20 2000 1000
30 3000 2000
40 4000 3000
| Is This Answer Correct ? | 7 Yes | 3 No |
Answer / indu
inputfile-->transformer-->outputfile
create stage variables
current salary
previous salary(intialize this to null)
derive them as below:
current salary-->previous salary
previous salary---> salary
in the output file derive previous salary as below
previoussalary--->current salary
| Is This Answer Correct ? | 3 Yes | 2 No |
Answer / indu
input file-->transformer--> output file
declare stage varibales
current salary
previous salary and initialize the previous salary to null
current salary--> previous salary
previous salary->salary
in the output file derive previousalary as
previoussalary-->current salary (stage variable)
| Is This Answer Correct ? | 3 Yes | 2 No |
Answer / anil
1. Input file-> Transformer -> Peek
2. Keep Tranformer in sequential mode or Make partition as same
3. Two stage variables
StgPrevSalary
StgCurrSalary
Derivations - StgVariables
StgCurrSalary- StgPrevSalary
Sal- StgCurrSalary
Output
Emp
StgCurrSalary
StgPrevSalary
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / indu
input file->transformer-> output file
in transformer declare stage variables as below:
current salaray
salary
previous salary
Initialize previous salary to null
current salary ---> previous salary
previous salary----> salary
In the output file derive the previous salary as
previousalary--->previous slary (stage variable)
| Is This Answer Correct ? | 0 Yes | 0 No |
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