Master MySQL Joins: Inner, Left, and Right Join Explained with Real Data
This tutorial demonstrates how MySQL inner, left, and right joins combine related tables, using student and score examples to show query syntax, result differences, and how missing data is handled with NULL values.
Key Takeaways
Inner join: shows only rows with matching keys in both tables.
Left join: shows all rows from the left table; missing right‑side data becomes NULL.
Right join: shows all rows from the right table; missing left‑side data becomes NULL.
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