Portfolio project guide
SQL Projects for Data Analysts
SQL portfolio project ideas that prove joins, window functions, cohort analysis, data quality, and business insight.
Data analyst candidates who want stronger SQL evidence on their resume.
SQL
Joins
Window functions
Cohorts
Data quality
Business metrics
Sales funnel SQL analysis
A funnel report with conversion rates, segment comparisons, and recommendations.
Shows SQL skill and business interpretation.
Customer retention SQL case study
A cohort model with retention curves, churn signals, and data caveats.
Demonstrates window functions, aggregation, and storytelling.
Data quality audit
A set of SQL checks for duplicates, missing values, invalid states, and reconciliation.
Shows practical quality control that teams need in production analytics.
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