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While admittedly this could be seen as a mistake in SQL, you can differentiate by looking at whether b.id is NULL or not.
by sorkin2 9y ago
While admittedly this could be seen as a mistake in SQL, you can differentiate by looking at whether b.id is NULL or not.
- marcus_holmes 9y agotrue, but that's not the point the OP was making, I think :)