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What is difference between join, merge and lookup stage?


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In the source seq file have 2 columns, i.e input: col1,col2 1,1 2,rajesh 3,15000 4,2 5,suresh 6,16000 7,3 8,veeru 9,17000 I want in the output like: eno,ename,sal 1,rajesh,15000 2,suresh,16000 3,veeru,17000 any one answer this scenario

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