Answer
A join condition defines how tables relate, usually through primary and foreign key columns.
Quick Answer
A join condition specifies how tables are related in a JOIN. ON clause: explicit condition (e.g., ON orders.user_id = users.id). USING clause: when the column name is the same in both tables (USING(user_id)). Natural join condition: automatically matches same-named columns (implicit, avoid in production - fragile). Always specify explicit join conditions with ON for clarity and correctness.
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SugharaIQ Editorial Team
Verified Answer
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Source: SugharaIQ