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This answer helped me understand it best. Thank you.
– DiddleDot
Commented Mar 17, 2021 at 16:09
Thanks so much to explain this issue. Now I understand better what is wrong in my query!
– Synkronice
Commented May 24, 2022 at 18:28
and if there are no ambiguous fields, because after a "LEFT JOIN" only one record goes? Then why I get this?
– John Smith
Commented Sep 11, 2022 at 14:18
1

@JohnSmith did not quite get what you mean, but I think for your specific table data you get only one record, so if you had more (different) data, you would get multiple results? I think Mysql does not care (predict) if you will have one or many results, it's the query and the fields that comes after SELECT that are ambiguous.
– Ahmad Mobaraki
Commented Sep 11, 2022 at 14:33
yes, it could be. Thanks.
– John Smith
Commented Sep 11, 2022 at 14:48

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