Analytical SQL on a 3-year retail dataset — window functions, cohort retention & RFM, with a runnable SQLite database.
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Jun 21, 2026 - Python
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windowfunctions
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Retail SQL analytics engine using MySQL (CTE, LAG, RANK) to generate revenue KPIs, segment insights, and business intelligence from 10K+ transactions.
mysql business-intelligence kpi data-analysis dataengineering database-design dataanalytics windowfunctions
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Feb 24, 2026 - Python
End-to-end educational data engineering pipeline using Python, PySpark, data cleaning, transformations, window functions, and Parquet output.
python big-data etl pyspark data-engineering parquet datapipeline datacleaning windowfunctions apche-spark
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Sep 16, 2026 - Python
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