Why data modeling connects related tables in Power BI - Quick Recap

Recall & Review

beginner

What is the main purpose of connecting related tables in data modeling?

To combine data from different tables so you can analyze and report on it together easily.

beginner

What type of relationship usually connects tables in Power BI data models?

A one-to-many relationship, where one table has unique values and the other has many matching rows.

intermediate

How does connecting tables improve report accuracy?

It ensures data from different tables matches correctly, so calculations and filters work as expected.

beginner

What happens if tables are not connected in a data model?

You can’t easily combine or filter data across those tables, leading to incomplete or incorrect reports.

intermediate

Why is it important to have a unique key in one table when connecting tables?

Because it acts like an ID that links rows correctly, avoiding confusion or duplicate matches.

What does connecting related tables in Power BI allow you to do?

A Delete duplicate rows automatically

B Combine data for better analysis

C Change data types in tables

D Create new tables from scratch

Connecting tables lets you combine data from different sources to analyze it together.

Which relationship type is most common when connecting tables?

A One-to-many

B One-to-one

C Many-to-many

D No relationship

One-to-many is common because one table usually has unique keys linking to many rows in another.

What is a key benefit of connecting tables in a data model?

A Automatic data cleaning

B Faster data entry

C Improved data filtering and calculations

D More colors in reports

Connections help filters and calculations work correctly across tables.

What can happen if tables are not connected properly?

A Data types will change

B Data will automatically merge

C Tables will delete themselves

D Reports may show wrong or incomplete data

Without connections, data from different tables won’t combine correctly, causing errors.

Why is a unique key important in one table when connecting tables?

A It links rows correctly without duplicates

B It speeds up report loading

C It changes data formats

D It creates new columns automatically

Unique keys act like IDs to match rows correctly between tables.

Explain why connecting related tables is important in data modeling.

Think about how separate pieces of information become useful when linked.

Describe the role of unique keys when connecting tables in Power BI.

Consider how IDs help match records between lists.