August 2019
Intermediate to advanced
560 pages
13h 41m
English
Content preview from Advanced Elasticsearch 7.0
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extended_stats_bucket
The purpose of this is to provide an extended statistics metric (the stats and sum_of_squares, variance, std_deviation, and std_deviation_bounds) of the buckets from the aggregation in the previous stage:
- Example: The purpose is to compute the extended statistics of the monthly closing price change in addition to the monthly closing price change for the ACWF ETF in the cf_etf_hist_price index:
"query":{"match": {"symbol":"ACWF"}},"aggs":{"monthly_change": {"date_histogram":{"field": "date","interval": "month","format": "yyyy-MM-dd"},"aggs":{"change_on_month":{"sum":{"field":"change"}}}},"extended_stats_monthly_change":{"extended_stats_bucket": {"buckets_path": "monthly_change>change_on_month"}}
- Resulting buckets ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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