Professional Data Engineer

Build and operate the data processing systems behind analytics and ML on Google Cloud, including BigQuery, Dataflow, and Pub/Sub, and track your readiness for the Professional Data Engineer exam.

Advanced

Prepare and test your skills

Advanced

Prepare and test your skills

Concept

data denormalization

Topic in 3 exam domains

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Also called: denormalization

A data modeling strategy that adds columns to a single table to reduce or remove joins, improving read performance at the expense of storage savings.

Where this appears on the exam

3 subdomains in 2 of 5 domains

Domain 3
Storing the data
~20% of exam
1. 3.2Planning for using a data warehouse
  - Designing the data model
  - Deciding the degree of data normalization
Domain 4
Preparing and using data for analysis
~15% of exam
1. 4.1Preparing data for visualization
  - Troubleshooting poor performing queries

How learners score on this topic

Last updated October 23, 2026

Professional Data Engineer

Build and operate the data processing systems behind analytics and ML on Google Cloud, including BigQuery, Dataflow, and Pub/Sub, and track your readiness for the Professional Data Engineer exam.

Advanced

Prepare and test your skills

Advanced

Prepare and test your skills

Concept

data denormalization

Topic in 3 exam domains

X LinkedIn Facebook Reddit

Also called: denormalization

A data modeling strategy that adds columns to a single table to reduce or remove joins, improving read performance at the expense of storage savings.

Where this appears on the exam

3 subdomains in 2 of 5 domains

Domain 3
Storing the data
~20% of exam
1. 3.2Planning for using a data warehouse
  - Designing the data model
  - Deciding the degree of data normalization
Domain 4
Preparing and using data for analysis
~15% of exam
1. 4.1Preparing data for visualization
  - Troubleshooting poor performing queries

How learners score on this topic

Last updated October 23, 2026