SQL vs NoSQL

Nel video sui Database, hai visto la differenza tra SQL e NoSQL. Hai visto che SQL usa schemi di database per definire le relazioni e che NoSQL ti permette di lavorare con dati meno strutturati.

Potresti anche ricordare alcuni esempi open source di database SQL e NoSQL e i loro casi d’uso.

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Introduzione al Data Engineering

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Introduzione al Data Engineering

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In this first chapter, you will be exposed to the world of data engineering! Explore the differences between a data engineer and a data scientist, get an overview of the various tools data engineers use and expand your understanding of how cloud technology plays a role in data engineering.

Exercise 1: What is data engineering?Exercise 2: Tasks of the data engineer Exercise 3: Data engineer or data scientist?Exercise 4: Data engineering problems Exercise 5: Tools of the data engineer Exercise 6: Kinds of databases Exercise 7: Processing tasks Exercise 8: Scheduling tools Exercise 9: Cloud providers Exercise 10: Why cloud computing?Exercise 11: Big players in cloud computing Exercise 12: Cloud services

Now that you know the primary differences between a data engineer and a data scientist, get ready to explore the data engineer's toolbox! Learn in detail about different types of databases data engineers use, how parallel computing is a cornerstone of the data engineer's toolkit, and how to schedule data processing jobs using scheduling frameworks.

Exercise 1: Database Exercise 2: SQL vs NoSQL

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Exercise 3: Lo schema del database Exercise 4: Join basate su relazioni Exercise 5: Diagramma dello star schema Exercise 6: Che cos'è il calcolo parallelo Exercise 7: Perché il calcolo parallelo?Exercise 8: Da attività a sottoattività Exercise 9: Uso di un DataFrame Exercise 10: Framework per il calcolo parallelo Exercise 11: Spark, Hadoop e Hive Exercise 12: Un groupby in PySpark Exercise 13: Esecuzione di file PySpark Exercise 14: Framework per la pianificazione dei workflow Exercise 15: Airflow, Luigi e cron Exercise 16: DAG in Airflow

Having been exposed to the toolbox of data engineers, it's now time to jump into the bread and butter of a data engineer's workflow! With ETL, you will learn how to extract raw data from various sources, transform this raw data into actionable insights, and load it into relevant databases ready for consumption!

Exercise 1: Extract Exercise 2: Data sources Exercise 3: Fetch from an API Exercise 4: Read from a database Exercise 5: Transform Exercise 6: Splitting the rental rate Exercise 7: Prepare for transformations Exercise 8: Joining with ratings Exercise 9: Loading Exercise 10: OLAP or OLTP Exercise 11: Writing to a file Exercise 12: Load into Postgres Exercise 13: Putting it all together Exercise 14: Defining a DAG Exercise 15: Setting up Airflow Exercise 16: Interpreting the DAG

Cap off all that you've learned in the previous three chapters by completing a real-world data engineering use case from DataCamp! You will perform and schedule an ETL process that transforms raw course rating data, into actionable course recommendations for DataCamp students!

Exercise 1: Course ratings Exercise 2: Exploring the schema Exercise 3: Querying the table Exercise 4: Average rating per course Exercise 5: From ratings to recommendations Exercise 6: Filter out corrupt data Exercise 7: Using the recommender transformation Exercise 8: Scheduling daily jobs Exercise 9: The target table Exercise 10: Defining the DAG Exercise 11: Enable the DAG Exercise 12: Querying the recommendations Exercise 13: Congratulations