In the rapidly evolving landscape of data, data engineering stands as the backbone of every data‑driven organization. As businesses increasingly rely on data fo...
In many software systems, not all data lives inside a database. Sometimes it’s stored in structured files such as CSV, TSV, or spreadsheets, and in practice the...
1. Joins in PySpark — The Heart of ETL Pipelines A join merges two DataFrames based on keys, similar to SQL. Basic Join python df.joindf2, df.id == df2.id, 'in...
What is a DataFrame? A DataFrame in Spark is a distributed, column‑based, optimized table‑like structure used for efficient data processing. - Feels like SQL -...
Data’s all around us — from CRM systems and cloud apps to spreadsheets and data warehouses. When teams are wrangling numbers across 15+ platforms and spending m...
!Cover image for Clean Code in ETL:How Python, Go, and SQL Each Teach You to Think Differentlyhttps://media2.dev.to/dynamic/image/width=1000,height=420,fit=cove...
Intro I can't jump right into the pipeline without a brief intro and highlighting the most obvious differentiating factor that Dagster has – Assets. In Dagst...
