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Won't work! Either suffix is L3 and terminal is L4, or vice versa. On the former, you break on every record. On the latter, you miss the multiple ranges. One way around this problem would be to use this technique and then post-process the ranges. It would take a bit of work, but if as you read through the summarized file you found one range was inside another, you could do a little I/O to break the larger range. It could get messy, though, and depending on your data might actually add overhead. Joe > From: Booth Martin > > Or use an Input primary on the new logical, breaking on the key fields, > and writing a summary record at L1 time. Fast, very fast.
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