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Learning and Sharing 2026-09-15T17:17:01Z Blog https://dataanalystinterview.com/data-analyst/data-analyst-portfolio-funnel-case-study/ 2026-09-15T19:22:56Z Data Analyst Interview en Write a Data Analyst Portfolio Case Study 2026-09-14T07:14:35Z Blog https://dataanalystinterview.com/data-analyst/pandas-merge-duplicate-revenue-validation/ 2026-09-15T19:23:01Z Data Analyst Interview en Pandas Merge Validation: Avoid Duplicate Revenue 2026-09-14T07:14:30Z Blog https://dataanalystinterview.com/data-analyst/investigate-revenue-drop-sql-worked-example/ 2026-09-15T19:23:07Z Data Analyst Interview en Investigate a Revenue Drop with SQL 2026-09-14T07:14:24Z Blog