Answer
INNER JOIN returns only matching rows, while FULL OUTER JOIN returns all rows from both tables with NULLs for non-matching data.
Quick Answer
INNER JOIN returns only rows with matching values in both tables (intersection). LEFT JOIN returns all rows from the left table plus matched rows from the right (unmatched right rows are NULL). RIGHT JOIN is the reverse. FULL OUTER JOIN returns all rows from both tables - matched where possible, NULL where not. Most commonly used: INNER JOIN for related data, LEFT JOIN to include optional relations.
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SugharaIQ Editorial Team
Verified Answer
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Source: SugharaIQ