Answer by eroomydna for MySQL performance of applying unique constraint...
The duration of the creation of the index will be directly related to the size of the index. I don't think it would be wildly different for the 2 options provided. Under the hood MySQL is going to copy...
View ArticleMySQL performance of applying unique constraint single column vs combination...
I have a large MySQL InnoDB table containing around 137 million rows.I need to add a unique constraint to the table. We have two options:1) A combination index on three columns, one of which will be...
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