source contains 2 columns comes to target 4 columns how
Answer / fayaz
by using copyfile we can easily create 4 columns in targetfile.
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my soure table is emp having columns sal,deptno in the deptno 10,20,30deptno row are there expected out put is min(sal) of 10th deptno,max(sal) of 20th deptno,mean(sal) of 30th deptno using aggregation stage
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