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The "increased SELECT performance" is due to the INDEX implicitly generated by the FK. You could add the index without adding the FK.

Rick James
– Rick James

2023-10-10 15:51:26 +00:00
Commented Oct 10, 2023 at 15:51
Please do not reference a SQL Server Q&A when answering a MySQL question; there are took many differences between them.

Rick James
– Rick James

2023-10-10 16:01:43 +00:00
Commented Oct 10, 2023 at 16:01

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