Explain the aggregator transformation?
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what is correlated query?
Which gives the more performance when compare to fixed width and delimited file ? and why?
why sequence generator should not directly connected to joiner transformation ?
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What is a joiner transformation?
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to improve the performance of aggregator we use sorted input option and use sorter t/r befor aggregator. But here we are increasing one more cache in our mapping i.e; sorter. So how can u convince that you are increasing the performance.?
What differs when we choose the sorted input for aggregator transformation?