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Subtitle:A Guide for Azure Data Engineers Key Differences Between ETL and ELT Processes in Azure www.visualpath.in +91-7032290546
Introduction to Azure Data Engineering • Azure provides a scalable cloud ecosystem for building modern data pipelines. • ETL and ELT are two primary approaches to ingest, process, and store data. • Understanding their differences is crucial for building efficient solutions. www.visualpath.in +91-7032290546
What is ETL? (Extract, Transform, Load) • Data is extracted from source systems. • Transformed in a staging area (on-prem or cloud). • Loaded into a destination like Azure SQL Database or Synapse Analytics. • Best for complex transformations before loading data. www.visualpath.in +91-7032290546
What is ELT? (Extract, Load, Transform) • Data is extracted from source systems. • Loaded directly into Azure Data Lake or Synapse Analytics. • Transformed inside the target system using native compute power (e.g., T-SQL, Spark). • Ideal for handling large volumes of raw data. www.visualpath.in +91-7032290546
Tooling in Azure for ETL • Azure Data Factory (ADF) for orchestration. • Azure Integration Runtime or SSIS for transformation. • Data loaded into Azure Synapse or SQL DB post-transformation. www.visualpath.in +91-7032290546
Tooling in Azure for ELT • ADF used primarily for orchestration and data movement. • Data stored in Azure Data Lake or Synapse. • Transformations performed using Synapse SQL, Databricks, or Spark pools. www.visualpath.in +91-7032290546
Key Differences: ETL vs ELT www.visualpath.in +91-7032290546
When to Use ETL or ELT in Azure • Use ETL when: • Source data needs cleaning before loading • Regulatory compliance requires transformation before storage • Use ELT when: • Working with large volumes of semi-structured or raw data • Utilizing Synapse or Databricks for scalable compute www.visualpath.in +91-7032290546
Conclusion • ETL and ELT both play key roles in Azure data pipelines. • Choose based on data volume, transformation complexity, and performance needs. • Azure supports both approaches using robust, integrated services. www.visualpath.in +91-7032290546
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