What's the most efficient way to select the last n number of rows in a table using mySQL? The table contains millions of rows, and at any given time I don't know how large the table is (it is constantly growing). The table does have a column that is automatically incremented and used as a unique identifier for each row.What's the most efficient way to select the las
阅读背景：
在不改变表结构的情况下，选择表中最后n行最有效的方法是什么?
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