January 2019
Beginner
556 pages
14h 19m
English
Content preview from Learning PostgreSQL 11 - Third Edition
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Aggregation
Storing individual entries in a data warehouse could be too expensive. The number of HTTP requests for a big web application could be huge, and nobody would care for the individual entries in such a dataset. The individual records are used to troubleshoot the system, but in this case it wouldn't make sense to keep them for longer than several days.
The table that contains the information about the HTTP API calls could have fields that contain the following information:
- The amount of bytes sent
- The response time
- The URL of the API endpoint
- the date and time of the request
- A user ID
In this case, the amount of bytes sent and the response time would be measures, and the URL of the API endpoint, HTTP status code, user ID, and ...
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