API>local_db>AWS_RDS - Disclaimer! All data used is for educational purposes only.

Last update: Apr 25, 2022

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Data Analysis ETL-Pipeline

Overview

API>local_db>AWS_RDS

Disclaimer! All data used is for educational purposes only.

ETL pipeline diagram.

Aim of project

By creating a fully working pipeline:

Familiarise with ETL
Improve python (API,pandas), SQL (triggers&procedures) knowledge
Work with a cloud storage service

What does it do?

The data used is electricity prices and weather conditions. The pipeline is fully autonomous: scheduled daily (crontab), electricity price data (.xls) is dowloaded, weather data fetched via an API, and inserted into a local database (Postgres). It is then cleaned and transferred (PL/pgSQL) into 3NF-tables (see ERDs below). Lastly, the clean useful data is migrated to Amazon Web Services' RDS remote database via the foreign-fata wrapper in PL/pgSQL.

Price data ERD.

Weather data ERD

Further improvements/learnings

Switch from time to event-based triggers
Upload data in batches, not 'for each row'
Prevent SQL injection

Owner

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