Power BI Fundamentals
Create visualizations and reports
View and edit data tables
Define relationships between tables
Write DAX queries directly
Tabular Model Definition Language
Import Excel workbooks seamlessly into Power BI for analysis.
- Support for .xlsx and .xls formats
- Multiple sheet import
- Automatic data type detection
- Live connection option
Load comma-separated and text files with ease.
- Delimiter customization
- Header row detection
- Encoding support
- Quick data preview
Connect to SQL Server and other databases directly.
- Direct query mode
- Import mode option
- SQL query builder
- Real-time data access
ETL Process
Traditional approach: Transform data before loading
ELT Process
Modern approach: Load first, then transform
- Data is cleaned before loading
- Reduced storage requirements
- Better data quality control
- Ideal for structured data
- Traditional data warehousing
- Faster data loading process
- Flexible transformation options
- Better for big data scenarios
- Cloud-native approach
- Scalable architecture
Power BI supports both ETL and ELT!
- Power Query for ETL transformations
- Direct Query for ELT approach
- Import mode for data caching
- Composite models available
✨ Five Powerful Views
Power BI offers five distinct views - Report, Table, Model, DAX Query, and TMDL - each serving specific purposes in data analysis and visualization.
📊 Multiple Data Sources
Connect to diverse data sources including Excel, CSV, PDF, SQL databases, and cloud services for comprehensive analysis.
⚙️ ETL vs ELT
Understanding the difference between ETL (Extract-Transform-Load) and ELT (Extract-Load-Transform) is crucial for efficient data processing.
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