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by ohlookabird
1916 days ago
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They might be logically equivalent, but they are not identical if more than two tables are joined. For instance, the current Postgres docs say [1]: > This latter equivalence does not hold exactly when more than two tables appear, because JOIN binds more tightly than comma. For example FROM T1 CROSS JOIN T2 INNER JOIN T3 ON condition is not the same as FROM T1, T2 INNER JOIN T3 ON condition because the condition can reference T1 in the first case but not the second. [1] https://www.postgresql.org/docs/current/queries-table-expres... |
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