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Data Modeling and Relationships Flashcards
Microsoft Power BI Data Analyst Flashcards
| Front | Back |
| How does context affect DAX calculations | Filters and relationships in your data model determine which data is included in DAX calculations |
| How does DAX improve data analysis | By allowing complex calculations, aggregations, and custom measures to be created |
| What are the four main types of relationships in data modeling | One-to-One, One-to-Many, Many-to-One, Many-to-Many |
| What does "Many-to-Many" relationships allow | Data in both tables to relate to multiple rows in the other table |
| What does cardinality in relationships specify | The number of elements in one table that relate to elements in another table |
| What does the CALCULATE function in DAX achieve | Modifies filter context for calculations |
| What does the DISTINCT function in DAX return | A unique list of values from a column or table |
| What does the RELATED function in DAX do | Retrieves a value from a related table based on the model relationships |
| What does the term "referential integrity" mean | Ensuring that relationships between tables remain consistent |
| What is a calculated column in DAX | A column with values computed using a formula for each row in a table |
| What is a data model | A structured framework for organizing and relating data to support analysis and reporting |
| What is a foreign key | A field in one table that links to the primary key in another table |
| What is a lookup table in data modeling | A table used to store reference data to simplify the relationships in a model |
| What is a measure in DAX | A calculation used to summarize or analyze data in your data model |
| What is a primary key | A unique identifier for each record in a table |
| What is DAX | Data Analysis Expressions, a formula language for creating calculations and measures in data models |
| What is the difference between implicit and explicit measures in DAX | Implicit measures are automatically created; explicit measures are user-defined |
| What is the purpose of relationships in data models | To connect tables so you can analyze data across multiple tables |
| When should you use a One-to-Many relationship | When one record in one table is associated with multiple records in another table |
| When should you use measures instead of calculated columns | When dealing with aggregations or values that depend on filters |
Front
What is the purpose of relationships in data models
Click the card to flip
Back
To connect tables so you can analyze data across multiple tables
Front
What is DAX
Back
Data Analysis Expressions, a formula language for creating calculations and measures in data models
Front
What are the four main types of relationships in data modeling
Back
One-to-One, One-to-Many, Many-to-One, Many-to-Many
Front
What is a primary key
Back
A unique identifier for each record in a table
Front
When should you use measures instead of calculated columns
Back
When dealing with aggregations or values that depend on filters
Front
What does the CALCULATE function in DAX achieve
Back
Modifies filter context for calculations
Front
What is a calculated column in DAX
Back
A column with values computed using a formula for each row in a table
Front
What does the term "referential integrity" mean
Back
Ensuring that relationships between tables remain consistent
Front
How does DAX improve data analysis
Back
By allowing complex calculations, aggregations, and custom measures to be created
Front
What does the RELATED function in DAX do
Back
Retrieves a value from a related table based on the model relationships
Front
When should you use a One-to-Many relationship
Back
When one record in one table is associated with multiple records in another table
Front
What is a measure in DAX
Back
A calculation used to summarize or analyze data in your data model
Front
How does context affect DAX calculations
Back
Filters and relationships in your data model determine which data is included in DAX calculations
Front
What does the DISTINCT function in DAX return
Back
A unique list of values from a column or table
Front
What does "Many-to-Many" relationships allow
Back
Data in both tables to relate to multiple rows in the other table
Front
What is a lookup table in data modeling
Back
A table used to store reference data to simplify the relationships in a model
Front
What is the difference between implicit and explicit measures in DAX
Back
Implicit measures are automatically created; explicit measures are user-defined
Front
What does cardinality in relationships specify
Back
The number of elements in one table that relate to elements in another table
Front
What is a data model
Back
A structured framework for organizing and relating data to support analysis and reporting
Front
What is a foreign key
Back
A field in one table that links to the primary key in another table
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This deck addresses the creation of data models, relationships, cardinality, and DAX basics to enhance data analysis capabilities.