how can find maximum salary by using Remove duplicate stage?
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For RMD Stage we need Grouping Keys, Add one extra hard coded Column to each Input records in previous stage.
DUMMY=1
In RMD Stage,
HASH partition on DUMMY, Sort DESC on Salary
and select DUMMY as Key in properties tab.
"Duplicate to Retain"=First.
then you will get only Highest Salart only from RMD Stage
| Is This Answer Correct ? | 5 Yes | 0 No |
Answer / narayana.3ds
R.D Stage remove the duplicates every one knows but u can
find max salary......
Give the key of salary order by descending other
option u can put=first
| Is This Answer Correct ? | 5 Yes | 2 No |
Answer / phani kumar
By using Sort stage, sort the data in Descending order, then
use remove duplicates stage, set option as first occurrence
of records. Then we will get max sal record first.
| Is This Answer Correct ? | 2 Yes | 1 No |
Answer / akila
In case an explicit sort stage is used like inteh reply
above, the sort will be done on emp_id(key field) and the
salary. But remove duplicate will be done only on emp_id. I
guess that this might result in a warning like 'sort and
remove duplicates keys do not match'.
| Is This Answer Correct ? | 0 Yes | 0 No |
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Drop duplicate records ... SOURCE LIKE .......... ID flag1 flag2 100 N Y 100 N N 100 Y N 101 Y Y 101 N Y 102 Y N 103 N N 104 Y Y 105 N N 106 N Y 102 N Y 105 Y Y in above file if any id having both the flags as "N" then that corresponding id records should be dropped, in above case o/p should be as ID flag1 flag2 101 Y Y 101 N Y 102 Y N 102 N Y 104 Y Y 106 N Y Steps to do : 1) Identified the id’s that got duplicated (both the flag values having vales “N”) 2) Look up with these id’s to existing id’s to drop .
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