Topic analysis

SQL patterns I use to catch transaction fraud

Program integrity analyst Fixel Smith outlines six practical SQL patterns to detect transaction fraud across sectors like government benefits, credit cards, and e-commerce, including checks for transaction velocity, geographic impossibility, unusual amounts, merchant anomalies, off-hours spending, and composable window function primitives. The post also covers best practices for handling false positives, data privacy, query cost optimization, and notes that combining multiple patterns improves fraud detection accuracy.