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SQL Joins Explained blog header covering LEFT JOIN INNER JOIN OUTER JOIN guide 2025 by Tom Mitchell
SQL Joins Explained: LEFT JOIN, INNER JOIN, OUTER JOIN Guide 2025 data career skills data engineering database fundementals query optimisation sql Aug 21, 2025

Tom Mitchell

Data Engineering & Analytics Consultant

Sharing everything I've learned from 8+ years building data solutions at companies like Revolut and ASOS.