A simple tutorial on how to use the Markdown markup language to showcase your SQL/Data Analytics portfolio on Github.

SQL-based analytical case study on a Rapido ride-hailing dataset, covering user behavior, ride patterns, vehicle performance, and cohort analysis using BigQuery SQL.

A full lifecycle of a database system for a small fast-food restaurant, covering design, deployment, and data analysis. Includes ER diagrams, schema design, and advanced SQL queries. Tools used: MySQL, Docker, and Azure Data Studio. All essential files are provided to replicate the database and conduct analysis.

Gaming, CRM, Fintech ve WFM gibi 6 farklı sektörde; Retention, Churn, Whale Analysis ve RFM Segmentasyonu gibi kritik iş problemlerini SQL ile çözümlediğim kapsamlı bir portfolyo çalışmasıdır.

Analyzing $33B in lending data across 2 Million+ records to identify credit risk patterns using Python, SQL, and Power BI.

SQL Database project based on Online Bookstore System. Includes database schema design, CSV dataset import, SQL queries, data analysis, revenue & inventory insights using PostgreSQL.

End-to-end data analysis project using SQL, Python, and Power BI to predict and mitigate customer churn.

A collection of my SQL projects with insights into real-world datasets.

ostgreSQL database analysis project solving community council queries using advanced SQL techniques including JOINs, aggregations, and window functions

SQL portfolio project analyzing 2,000 barbershop customer visits — customer segmentation, retention/churn, service revenue mix, and Pareto analysis using window functions, CTEs, and conditional aggregation in SQLite.

SQL solutions for Case Study #1 (Danny's Diner) from the 8 Week SQL Challenge

End-to-end SQL project in MySQL: a data warehouse (Medallion Architecture, Bronze/Silver/Gold) built from CRM & ERP data, plus a full analytics layer covering exploration, segmentation, ranking, trends, and customer/product reporting.

SQL-based business analytics on the Online Retail II dataset, answering core customer, revenue, retention, and product performance questions.

Digital Music Store Data Analysis via SQL. Features sequential schema joins, dynamic scalar subqueries, CTEs, and DENSE_RANK() window functions to isolate top spenders and handle multi-genre regional ties cleanly.

Relational database design and architecture project for a sales ecosystem using MySQL.

33 SQL queries (basic → advanced → window functions) solved on a self-designed 6-table dataset — joins, subqueries, pivots, running totals

SQL analysis of the PostgreSQL DVD Rental sample database exploring revenue, customers and rental patterns.

PostgreSQL portfolio project modeling an e-commerce platform — schema design, joins, CTEs, window functions, views, indexing, and analytics queries. Built to demonstrate real SQL skills for Data/Analytics/AI Engineering roles.

Comprehensive analysis of a large-scale employee database using advanced SQL techniques

Engineered a BI framework to drive growth and operational efficiency. Segmented 90+ customers for churn mitigation, audited logistical ROI to optimize shipping costs, and automated margin protection for discontinued inventory. Delivered actionable KPIs for sales attribution and revenue forecasting using 830+ order records.